TW201217163A - Multilayered polyolefin resin film for back protection sheet for solar cell - Google Patents

Multilayered polyolefin resin film for back protection sheet for solar cell Download PDF

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TW201217163A
TW201217163A TW100134724A TW100134724A TW201217163A TW 201217163 A TW201217163 A TW 201217163A TW 100134724 A TW100134724 A TW 100134724A TW 100134724 A TW100134724 A TW 100134724A TW 201217163 A TW201217163 A TW 201217163A
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Taiwan
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layer
weight
resin
film
parts
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TW100134724A
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Chinese (zh)
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Kouji Taniguchi
Noboru Nakagaki
Futoshi Okuyama
Shigeru Tanaka
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Toray Advanced Film Co Ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethylene
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H10F19/804—Materials of encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10F—INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION
    • H10F19/00—Integrated devices, or assemblies of multiple devices, comprising at least one photovoltaic cell covered by group H10F10/00, e.g. photovoltaic modules
    • H10F19/80—Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells
    • H10F19/85—Protective back sheets
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Photovoltaic Devices (AREA)

Abstract

A multilayered polyolefin resin film for back protection sheets for solar cells which has a three-layer configuration composed of layer A/layer B/layer C, characterized in that layer A comprises a resin composition comprising 100 parts by weight of polyethylene and 50-500 parts by weight of a polypropylene resin, layer B comprises a polypropylene resin composition containing a colorant added thereto in an amount of 5-50 wt.%, and layer C comprises a polypropylene resin composition. The multilayered polyolefin resin film has excellent heat resistance to such a degree that the film, when heated and press-bonded in, for example, a glass laminating step, is not thinned by the influence of a wiring member such as a bus bar. The film has high adhesive force after thermal adhesion to resins which are in use as sealing materials for power generation cells, such as ethylene/vinyl acetate copolymer resins, has excellent interlaminar adhesion force, and is suitable for use as a material for back protection sheets for solar cells.

Description

201217163 六、發明說明： 【發明所屬之技術領域】 本發明係關於太陽電池背面保護片用聚烯烴系樹脂多層 薄膜。更詳言之，係關於在太陽電池的製造步驟中，當利用 玻璃層壓步驟等進行加熱壓接時，不會有因發電單元或稱為 「匯流排(bus bar)」的集電電極等佈線構件的影響，導致薄 膜變薄變形而使發電單元或匯流排透出之程度的優異耐熱 性、隱藏性，且與當作太陽電池密封材使用的乙烯·醋酸乙 烯酯共聚合樹脂等樹脂間之熱接著力高，適合於太陽電池背 片材料的聚烯烴系樹脂多層薄膜。 【先前技術】 聚乙烯或聚丙烯等聚烯烴系樹脂薄膜，因為具有適度的強 度，且透明性、熱封性、防濕性、耐藥品性、低溫衝擊強度 等均優異，因而廣泛被使用為食品、飲料、醫藥•醫療品、 工業材料、生活材料等的各種包裝材料。又，近年來’供太 陽光發電用之太陽電池模組的背面保護片之構件，從輕量 性、防濕性及高耐電壓特性的觀點而言，係使用聚烯烴系樹 脂薄膜，且對該聚烯烴系樹脂薄膜係要求為了太陽電池模組 的性能提升與長期可靠度之各種特性。 相關對該等聚烯烴系樹脂薄膜的要求特性，係要求與屬於 發電單元之密封材的乙烯•醋酸乙烯酯共聚合樹脂（以下簡 稱「EVA」）間之熱接著性、以及用以抑制因熱接著時的壓 100134724 3 201217163 力而出現變形之耐熱性的相反特性。 例如專利文獻1中揭示：作為太陽電池模組背片，使用在 密度0.940〜0.970g/cm3的聚乙烯系樹脂中添加紫外線阻斷 劑或抗氧化劑的薄膜之方法，但該配方雖與EVA的熱接著 性優異，但耐熱性卻不足，在太陽電池模組的製造步驟中， 受玻璃層壓時的熱與壓力之影響，導致薄膜出現變形，而造 成薄膜部分地變薄’致使出現發電單元或匯流排等的佈線透 出，或耐電壓特性降低的問題。 再者，專利文獻2在改善因太陽電池的電極部之焊料突起 部所衍生的耐貫通性之目的下，有相關含有經積層著聚丙烯 系树月曰與聚乙烯系樹脂之薄膜薄片的太陽電池模組背面保 濩片之記載’但僅將聚丙烯系樹脂與聚乙烯系樹脂利用共擠 出而積層，在積層的界面容易發生剝離，因而使用為太陽電 池模組背面保護片時的限制較大。 在實現較專利文獻2所揭示由聚丙烯系樹脂與聚乙烯系 才对月曰進行積層的薄片具有更優異耐熱性’且與使用作為發電 單疋之密封材的EVA等樹脂間之熱接著力高的薄片之時， 期待能解決改善聚丙烯系樹脂層與聚乙烯系樹脂層間之界 面欲接力問題的聚烯烴系樹脂多層薄膜之開發。又，使用作 為發電單元密封材的EVA，在阻斷紫外線之目的下係添加 有機系紫外線吸收劑、然而’該有機系紫外線吸收劑的添加 里係因製造廠商而有所差異，會有經數年使用而出現有機系 100134724 201217163 紫外線吸收劑失活的問題。因而，太陽電池模 亦期待對紫外線的耐紐。 、片 [先行技術文獻] [專利文獻] [專利文獻1]曰本專利特開平n_261〇85號公報 [專利文獻2]曰本專利特開2〇〇4_223925號公報 【發明内容】 (發明所欲解決之問題） 本發明之課題在於解決上述問題。即，本發明目的 供：作為太陽電池背面保護片，在太陽電池模級:提 中’當利用麵層壓步驟等進行加熱壓接時，具有 匯流排等佈線構件的影響而變形，導致薄膜變薄，^會因雙 排等佈線構件透出之程度的優㈣祕、隱酿，且=流 發電單it之密封材用的職㈣朗之熱接著力/，、二 «接力優異的太陽電池背面保護片用料㈣樹脂多^ (解決問題之手段） 為解決上獅題’本發明的太陽電池背面保護片用聚稀烴 系樹脂多層薄祕* A層/B層/C層等3層職的薄膜，其 中，A層係由相對於聚乙烯1〇〇重量份混合聚丙烯系樹脂 50 500重畺份的樹脂組成物所構成，b層係由著色化劑添 里為5〇重里4之聚丙稀系樹脂組成物所構成，c層係 100134724 201217163 由聚丙烯系樹脂組成物所構成 (發明效果） 本發明的聚烯烴系樹脂多 笪广 增席膜係當利用玻璃層壓击赖 寺進仃加熱壓接時，具有不合 監乂驟 品确π 3 ㈢因叉匯流排等佈線構件的影塑 而皮形，導致薄膜變薄程度 〜曰 的優異耐熱性’且盥當作發電單 兀之密封材用的驗等樹脂間之熱接著力高，層間密接力 亦優異’因而特別適合使用於太陽電池背面保護片材料。 【實施方式】 、下針對本發明’與較佳實施形態—起進行詳細說明。 ^本毛明的聚稀烴系樹脂多層薄膜中，Α層所使用的聚乙稀 係可舉例如高壓法低密度聚乙稀、直鏈狀低密度聚乙烤、高 密度聚乙烯、或該等的混合樹脂。 所谓「直鏈狀低密度聚乙烯」係指乙烯與α-烯烴的共聚 合體（以下簡稱「LLDPE」），較佳係碳原子數4〜20、更佳係 4〜8的α-烯烴之共聚合體，具體係可舉例如與卜丁烯、卜 戊烯、4-甲基_1_戊烯、ι_己烯、丨·庚烯、丨_辛烯、卜壬烯、 1-癸烯等的共聚合體。該等α-烯烴係可單獨使用或組合使 用，從聚合生產性而言，較佳係使用1_ 丁烯、1·己烯、1-辛烯等。 本發明所使用之LLDPE的熔點較佳係110〜130°C之範 圍。藉由使熔點在130°C以下，與EVA的熱接著性優異， 而藉由設為ll〇°C以上，在與EVA進行熱熔接時，不會使 100134724 6 201217163 薄片的厚度減y ’並可保持部分放電電壓，因而較佳。 再者，相關該LLDPP aa — ώ * ° Ε的岔度，較佳係〇.9〇g/Cm3 若密度高於0.94g/em3’則與聚丙稀系樹脂間 ^ 低’在與編或橡膠_的摩擦時，會出 = 導致成為㈣發生的要f較佳係在㈣g/em3^洛 本發明中’ LLDPE中的α_婦煙含量較佳係〇 $〜 。 更佳係2.G〜8.G莫耳％。藉由將α稀烴含量調整為Q =、 耳％，可使LLDPE的密度成為〇.9〇g/cm3以上且〇 9莫3 以下的範圍。 g Cm 本發明所使用之LLDPE白勺融指數（以 rMFRj)j O^io.Og/10 i.〇^.〇g/1〇^4 若MFR小於〇.5g/l〇分’當薄膜製膜時容易與其他層之 出現積層不均情形。又，若MFR大於1〇 〇g/1〇分則容易’ 在澆注時出現操作性不良或因結晶化度增大而造成脆化。 本發明所使用的LLDPE係利用習知依多活性點 (multi-site)觸媒進行的聚合方法、或使用單一活性點觸媒 (Kaminsky觸媒、二茂金屬觸媒）的聚合方法便可進行製造。 咼壓法低密度聚乙烯（以下簡稱r LDPE」）係與LLDPE相 同，利用習知依多活性點觸媒進行的聚合方法、或使用單一 活性點觸媒(Kaminsky觸媒、二茂金屬觸媒）的聚合方法便可 進行製造。 LDPE的松度較佳係〇.9〇〜〇 93g/cm3範圍。藉由將密度設 100134724 7 201217163 為0.90g/cm3以上，可確保優異的薄膜滑動性，在加工時的 薄膜取用性佳，因而較佳。另一方面，藉由設為0.93g/cm3 以下，可容易地顯現出聚乙烯與聚丙烯系樹脂之分散性的提 升效果。 上述LLDPE中混合LDPE之情況，因為會使聚乙稀與聚 丙烯系樹脂的分散性提升，並提升A層内的凝集破壞強度， 因而較佳，相對於聚乙烯全體，LDPE最好混合3〜30重量％。 當本發明的A層係使用密度為0.94〜0.97g/cm3之高密度 聚乙烯（以下簡稱「HDPE」）時，雖薄膜的彈性與耐捲曲優 異，但另一方面會因加工時的輥摩擦導致HDPE脫落而產生 白粉，故會有引發薄膜遭污染或損傷等問題的情況，必須注 意熔點越高於LLDPE與LDPE，越應提高設定與EVA施行 熱接著時的加熱溫度等。 其次，本發明的A層中，相對於聚乙烯100重量份，聚 丙稀系樹脂必須混合50〜500重量份。藉由將聚丙稀系樹脂 混合50〜500重量份，可提升耐熱性，且可提高與B層之密 接力。若聚丙烯系樹脂超過500重量份，則與EVA的密接 性不足，另一方面，若少於50重量份，則耐熱性以及B層 間的密接力提升效果會降低。 本發明所謂「耐熱性」係指使用作為太陽電池背面保護片 時，能承受加工步驟中所實施之130〜170°C的玻璃層壓等。 更具體而言，如前述，在組裝有匯流排等佈線的太陽電池模 100134724 8 201217163 組之製造步财’構鼓陽魏㈣賴 玻璃層壓料的熱朗力而“會口-丁 以上係為重要。藉由保持初•声厚度維持於8〇% 从.^ b 功予度，可形成匯流排等佈線構 件不會透出，且外觀性優異的 t A v y 陽電池杈組。又，絕緣破壞 電壓與部分放電電壓等耐電壓係樹脂的固有值，因為與薄： 厚度間存在比例關係，故為了藉由擔保處理前的厚度而專 初期設計時的電氣特性’耐熱性係極重要。 、 當加工溫度為13(M耽的情況，聚丙稀系樹脂含有 佳係50〜250重量份的範圍、更佳係秦細重量份。又 當加工溫度為刚70。⑽情況時，聚㈣系樹脂含有： 佳係250〜重量份的範圍、其中更佳係〜㈣ = 的範圍。 1/7 聚丙稀系樹脂係可舉例如同元聚丙婦、乙稀•丙婦無規放 聚合體、乙稀•丙職段共聚合體，從耐熱性、滑動性、； 膜操作性、以及與聚乙狀分散性等觀點而言，較佳係乙 烯·丙烯嵌段共聚合體及同元聚丙烯。 當使用乙婦與丙稀的共聚合體時，乙稀含有量較佳係 1〜I5莫耳。/〇的範圍。乙稀含有量少於i莫耳％時對认如石 或LDPE或者該等的混合樹脂之分散性降低，在與金屬輥戈 橡膠親之摩擦時’樹脂容易脫落而成為白粉產生的要因，且 與EVA的接著力會降低。另一方面，若超過15莫耳％，則 在與EVA進行紐接時，會有薄#厚度減少、部分放電電 100134724 9 201217163 壓降低的情況發生。 再者，上述聚丙烯系樹脂於230°C下之MFR較佳係 1.0〜15g/10分的範圍。若MFR小於1.0g/10分，則在製膜步 驟中，會出現薄膜寬度小於喷嘴的吐出寬度（頸縮 (necking))，導致薄膜的安定製造趨於困難，故最好避免。 又，若MFR大於15g/10分，則結晶化速度增加而變脆，故 最好避免。 聚丙烯系樹脂的熔點係從耐熱性、滑動性、薄膜操作性、 耐捲曲性、以及與EVA的熱接著性之觀點而言，較佳為 140°C〜170°C的範圍。藉由將熔點設定在140°C以上，A層 便具有優異的耐熱性，當使用為太陽電池用背片且與EVA 進行熱熔接時，可抑制薄片厚度減少或部分放電電壓降低等 不良情況，因而較佳。藉由將熔點設定在170°C以下，可確 保與EVA的優異密接力，因而較佳。 再者，藉由在聚乙烯中混合非相溶的聚丙烯系樹脂，會在 薄膜表面產生凹凸，亦可帶來滑動性優異的效果。藉此，當 施行製膜、切割時，容易捲繞，加工性優異。另一方面，當 滑動性差的情況，因切割等而混入的空氣不易脫除，會因未 脫除的空氣而導致薄膜形狀出現部分性變形，依情況亦會有 薄膜彼此間發生黏結(blocking)，導致在剝離時遭受損傷的 情況發生。 本發明的A層表面平均粗糙度Ra係0.10〜0.30μηι，因為 100134724 10 201217163 能滿足加工時的薄膜操作機能，故較佳。 本發明的A層中，在改善薄膜取用性、滑動性之目的下， ，可相對於A層的榭脂成分，添加Q卜⑺重量％的平均粒 Ί 5μιη之無機或有機粒子。無機粒子係可使用例如濕式 -氣化紗、乾式二氧切、膠態二氧切 '㈣銘、碳酸詞 等無機粒子，而有機粒子係可使用例如笨乙烯、聚矽氧、丙 稀酉文？基丙稀酸等的交聯有機粒子等。其中，從對樹脂的 分散性觀點而言’較佳係使时酸㈣無機粒子。若平均粒 徑未滿_，則薄膜的滑動性提升效果較低，又若平均粒徑 大於5卿，則粒子會從薄膜脫落而成為污染或損傷的原因， 因而必需注意。 再者，相對於Α層樹脂成分，可添加有機化合物〇 ι〜ι〇 重量％的滑劑。有機化合物的滑_可舉例如硬脂酸醯胺、 硬脂酸鈣等。 其次，本發明的B層係由含有著色化劑的聚丙烤系樹脂 組成物所構成。此處所謂「聚丙歸系樹脂組成物」係由聚丙 烯系樹脂為從同元聚丙烯、乙烯與㈣的無規或嵌段共聚合 體中選擇之至少-種以上的樹脂或該等樹脂與聚乙稀的混 合樹脂所構成’從雜性的觀點而言，聚乙烯含有量較佳係 未滿樹脂成分全體的30重量％。 當聚丙烯系樹脂係使用乙烯與兩歸的共聚合體時，從耐熱 性的觀點而言’較佳係乙稀含有量在15莫耳％以下。 100134724 11 201217163 再者，當欲對薄膜賦予強度的情況，視需要亦可添加結晶 核劑。此情況，較佳係CX晶的結晶核劑，具體係可舉例如山 梨糖醇系、環戊二烯系的結晶核劑。 聚丙烯系樹脂在230°c下的MFR，就從與A層及後述c 層進行共擠出時的積層性觀之，較佳係丨.〇〜15g/1〇分的範 圍。當MFR小於i.OgAO分的情況，在製膜步驟中，從喷 嘴熔融擠出的薄膜會頸縮，導致薄膜寬度方向的厚度不均惡 化，較難安定製膜，因而最好避免。又，當MFR大於15岁1〇 分的情況，結晶化速度會增加並變脆，㈣最好避免。 本發明B層所❹的著色化_可舉例如氧化鈦、硫酸 顏、碳黑、酞菁系化合物等無機系或有機系任一種著色化 劑。其中’最佳為氧化鈦粒子，就結晶型而言，已知有金紅 石型、銳鈦、板鈦礦型等，從優異的白色度、耐候性及 光反射性等特性觀之，較佳為金紅石型。 、f 本發明所使用的氧化鈦會有因光觸媒作用錢樹脂劣化 的可能性，因而在抑制光觸媒作用之目 面被覆處理，雖其組成並無限定，但_佳' '^佳係施打表 或氧化鋅等無機氧化物。相關表面被;劑： :定，用依照公知方法所獲得的氧化二 再者，從氧化鈦粒子的安定化目的而一 加例如受阻胺系等光安定劑。但，此時村在樹脂中添 子二次凝集的方式選定之事係屬重要。不θ導致氧化鈦粒 100134724 12 201217163 本發明所使用之著色化劑粒子的平均粒徑較佳係 0.2〜0加，在提高可見光反射率之目的下，更佳係使用 0.25〜0.3_者。又，當作太陽電池用背面保護片用時，為 了賦予放熱性，較佳倾高紅外光岐料，更佳係平均粒 徑0.35〜〇加者。視需要，藉由混合此2種㈣，便可提 高可見光及紅外光狀射率，因㈣佳。若平均粒徑小於 〇·>，氧化蹄子等雜性度會㈣，成料賴脂劣化 的要因’因㈣好避免。又，若平均粒徑超越0加，則對 樹脂的分散性會惡化，成為_製造時所使用之過濾器出現 阻塞的原因，因而最好避免。 再者’本發明所使狀B層的著色化_加量，雖由其 比重所左右，但必需在5〜5〇重量％的範圍内，其中較佳係 1〇〜3〇重量％的範圍。藉由將添加量設為5重量％以上，便 可獲得充分的白色化與光反射效果，匯流排等佈線材料不會 透出:可形成外觀性優異者。另—方面，將5G重量％設為 上限係因即便添加超過此以上仍不會使白色化、隱藏性有所 k升且著色化劑充分分散於樹脂，亦可確保安定的製膜性。 再者B層中亦可使用製造戎薄膜時所產生的切割屑等作 為回收原料。频而言，將㈣】料骑絲，並在該薄膜 的B層中添加5〜70重量％，因為經濟性優異，因而較佳， 而從維持耐熱性的觀點而言，較佳係此時B層中的聚丙稀 系樹脂係由從同元《烯、乙叫⑽的減絲段共聚合 100134724 13 201217163 虹中4擇之至少-種以上的樹脂、或該等樹脂與聚乙烯的混 合樹脂所構成’聚乙烯的含有量較麵未賴脂成分全體的 30重里％ 4造粒的方法，—般係將經裁斷物施行炫融擠出 後再施行切粒的方法，惟並不僅侷限於該方法。 其_人本♦明的c層係由聚两歸系樹脂組成物所構成， 與B層同樣的’從耐熱性的觀點而言，較佳係以從同元聚 丙浠、乙烯與两稀的無規或嵌段共聚合體等聚丙烯系樹脂中 之i種以上的樹脂為主成分，且聚丙烯系樹脂含有7〇 重量％以上’而從耐熱性、滑動性、薄膜操作性、耐損傷性、 对捲曲性的觀點而言，較佳係單獨為同元聚丙稀。聚丙稀系 樹脂的雜從耐熱性、滑動性、_操作性、卿傷性、及 财捲曲性的觀點心較佳為啊〜⑽的範圍。藉由將 炼點設為15(TC以上，可使耐熱性優異，當作太陽電池用背 片時，不會有因與EVA進行熱炫接時的溫度與壓力，而導 致薄片厚度減少或部分放電電壓降低的情形，因而較佳。炼 點超過17GC者係有高立體規則性同元聚丙烯，此時與b層 間之結晶化度差過大，薄臈的捲曲情形變大，導致捲取性出 現問題，且與其他基材間之接著性亦降低，必需注意。 該聚丙烯系樹脂在230°C下的MFR較佳係1.〇〜i5g/i〇分 的範圍。當MFR小於1.0g/l〇分的情況，在製膜步驟會出 現頸縮情形，導致薄膜的安定製造趨於困難。又，當MFR 大於15g/10分的情況，結晶化速度會增加，導致變脆，任 100134724 14 201217163 一情況在製膜步驟中均必需注意。 再者，當欲對薄膜賦予強度的情況，視需 核劑。此情況，較佳# α曰的钍a加'、、口日日 华糖醇f w 劑，具體係可舉例如山 ▲糖知糸、％戊二料的結晶核劑 相對於樹重侧_：：=丨的添加量係 面之聚烯烴系多層樹脂薄膜使用為太陽電池背 A展：風’時’從防變色、強度維持的觀點而言，最好在 A層、B層及c屌由天石八土 >岛 取好在 芳香族料、/劑。抗氧化_有盼系、 方曰、女“，系、磷系等，因為少量 故較佳係併用2種以上者。例如較 “效果， 祕⑽讀磷系，可 盼糸“化劑。從擠出時的熱安定性、耐候 狀觀點而言，該抗氧化劑較佳係添加住友化學製 S:mill=GP」°添加量相對於S層樹脂較佳為0.05〜0.35 勺範圍若添加量未滿0.05重量％，則效果降低， 之右超過G.35重量％，則會有分散性惡化的情況。 再：，本發明的A層、B層及c層中至少i個以上的層 中，從使料太陽電池背面賴片材料時的防變色、耐候性 提升之觀點而言’亦可含有上述以外的其他添加劑。' j述其他添加劑係可舉例如光安定劑、紫外線吸收劑、熱 安定劑。光安定劑係、可使用可捕捉樹脂中之光劣化開始的活 種俾防止光氣化者。具體而言係可使用從受阻胺系化人 物又阻辰β疋系化合物、及其他等之中選擇之1種或組合2 100134724 15 201217163[Technical Field] The present invention relates to a polyolefin-based resin multilayer film for a solar cell back surface protective sheet. More specifically, in the manufacturing process of a solar cell, when heating and pressure bonding is performed by a glass lamination step or the like, there is no power generation unit or a collector electrode called a "bus bar". The influence of the wiring member causes the film to be thinned and deformed to have excellent heat resistance and concealability to the extent that the power generation unit or the bus bar is permeable, and is interposed between the resin such as ethylene/vinyl acetate copolymer resin used as a solar cell sealing material. The heat of the film is high, and the polyolefin-based resin multilayer film suitable for the solar cell back sheet material. [Prior Art] A polyolefin-based resin film such as polyethylene or polypropylene is widely used because it has moderate strength and is excellent in transparency, heat sealability, moisture resistance, chemical resistance, low-temperature impact strength, and the like. Various packaging materials for food, beverages, pharmaceuticals, medical products, industrial materials, and living materials. In addition, in recent years, the member for the back surface protective sheet of the solar cell module for solar power generation uses a polyolefin resin film from the viewpoints of light weight, moisture resistance, and high withstand voltage characteristics, and This polyolefin-based resin film requires various characteristics for the performance improvement and long-term reliability of the solar cell module. The required properties of the polyolefin-based resin film are required to be thermally bonded to an ethylene-vinyl acetate copolymer resin (hereinafter referred to as "EVA") of a sealing material belonging to a power generation unit, and to suppress heat generation. The next pressure is 100134724 3 201217163 The opposite characteristic of the heat resistance of the deformation occurs. For example, Patent Document 1 discloses a method of adding a film of an ultraviolet blocking agent or an antioxidant to a polyethylene resin having a density of 0.940 to 0.970 g/cm 3 as a solar cell module back sheet, but the formulation is compatible with EVA. The thermal adhesion is excellent, but the heat resistance is insufficient. In the manufacturing process of the solar cell module, the heat and pressure of the glass lamination cause the film to be deformed, and the film is partially thinned. Or the wiring of the bus bar or the like is exposed, or the withstand voltage characteristic is lowered. Further, in the case of improving the penetration resistance by the solder bumps of the electrode portions of the solar cells, the patent document 2 has a solar cell containing a film sheet of a polypropylene tree and a polyethylene resin. "There is a description of the backing sheet of the battery module." However, only the polypropylene resin and the polyethylene resin are laminated by co-extrusion, and peeling is likely to occur at the interface of the laminate. Therefore, the use of the solar cell module back protective sheet is limited. Larger. In order to realize the thermal adhesion between the polypropylene-based resin and the polyethylene-based laminate which is laminated with the polypropylene-based resin and the polyethylene-based laminate, it is more excellent in heat resistance' and the resin such as EVA which is used as a sealing material for the power generation unit. In the case of a high sheet, it is expected to solve the development of a polyolefin-based resin multilayer film which improves the problem of the interface between the polypropylene resin layer and the polyethylene resin layer. In addition, an EVA which is a sealing material for a power generation unit is used, and an organic ultraviolet absorber is added for the purpose of blocking ultraviolet rays. However, the addition of the organic ultraviolet absorber varies depending on the manufacturer, and there are a number of passes. The use of the organic system 100134724 201217163 UV absorber inactivation occurs. Therefore, the solar cell model is also expected to be resistant to ultraviolet rays. [Patent Document 1] [Patent Document 1] Japanese Patent Laid-Open Publication No. JP-A No. Hei. No. Hei. No. Hei. Solution to Problem) An object of the present invention is to solve the above problems. In other words, the object of the present invention is to provide a solar cell back surface protective sheet which is deformed by the influence of a wiring member such as a bus bar when the surface is laminated and heated by a surface lamination step or the like, resulting in a film change. Thin, ^ will be excellent due to the degree of the double-row wiring members (4) secret, hidden brewing, and = flow generation power single it seals for the job (four) Lang hot heat /,, two «excellent solar battery The material for the back protective sheet (4) Resin (^ The solution to the problem) In order to solve the problem of the lion's problem, the solar cell back protective sheet of the present invention has a polythene-based resin multilayer thin layer* A layer/B layer/C layer and the like In the film of the job, the layer A is composed of a resin composition of 50 500 parts by weight of the polypropylene resin mixed with 1 part by weight of the polyethylene, and the layer b is added by the coloring agent to 5 parts. The polypropylene resin composition is composed of a polyacrylic resin composition, and the c layer is 100134724 201217163. The polypropylene resin composition of the present invention is an effect of the invention. When heated and crimped, it has no supervision乂 确 确 确 3 (3) The shape of the wiring member such as the fork bus bar is thinned, resulting in a thin film thickness ~ excellent heat resistance of 曰 'and the use of the resin for the sealing material of the power generation unit The heat is high and the adhesion between the layers is excellent, so it is particularly suitable for use in solar cell back protective sheet materials. [Embodiment] The present invention will be described in detail with reference to the preferred embodiments. In the polythene-based resin multilayer film of the present invention, the polyethylene used in the ruthenium layer may, for example, be a high pressure method low density polyethylene, a linear low density polyethylene baking, a high density polyethylene, or the like. Mixed resin. The "linear low-density polyethylene" means a copolymer of ethylene and an α-olefin (hereinafter referred to as "LLDPE"), and is preferably a copolymer of an α-olefin having 4 to 20 carbon atoms, more preferably 4 to 8 carbon atoms. The complex is specifically, for example, with butene, pentene, 4-methyl-1-pentene, i-hexene, hydrazine heptene, hydrazine-octene, decene, 1-decene, and the like. Copolymer. These α-olefins may be used singly or in combination, and from the viewpoint of polymerization productivity, 1-butene, 1-hexene, 1-octene or the like is preferably used. The melting point of the LLDPE used in the present invention is preferably in the range of 110 to 130 °C. When the melting point is 130 ° C or lower, the thermal adhesion to EVA is excellent, and by setting it to ll 〇 ° C or more, when the heat fusion is performed with EVA, the thickness of the sheet of 100134724 6 201217163 is not reduced by y'. It is preferable to maintain a partial discharge voltage. Furthermore, the correlation of the LLDPP aa - ώ * ° , is preferably 〇.9〇g/Cm3. If the density is higher than 0.94g/em3', it is low with the polypropylene resin. When the friction of _ is out, it will result in the occurrence of (d). It is better to be in the (four) g/em3^ Loben invention. The α_futosan content in LLDPE is preferably 〇$~. More preferably 2.G~8.G mole%. By adjusting the α-lean hydrocarbon content to Q = and ear %, the density of LLDPE can be in the range of 〇9〇g/cm3 or more and 〇9%3 or less. g Cm The melting index of LLDPE used in the present invention (in rMFRj) j O^io.Og/10 i.〇^.〇g/1〇^4 If the MFR is less than 〇.5g/l〇' The film is easily unevenly laminated with other layers. Further, if the MFR is more than 1 〇 〇 g / 1 〇, it is easy to cause operability at the time of pouring or embrittlement due to an increase in the degree of crystallization. The LLDPE used in the present invention can be carried out by a polymerization method using a conventional multi-site catalyst or a polymerization method using a single active point catalyst (Kaminsky catalyst, metallocene catalyst). Manufacturing. The low pressure polyethylene (hereinafter referred to as r LDPE) is the same as LLDPE, using a polymerization method based on a conventional active point catalyst, or using a single active point catalyst (Kaminsky catalyst, metallocene catalyst) The polymerization method can be manufactured. The bulk of the LDPE is preferably in the range of 〇9〇~〇 93g/cm3. By setting the density to 100, 134, 724, and 7, 2012,163 to 0.90 g/cm3 or more, excellent film slidability can be ensured, and film usability at the time of processing is good, which is preferable. On the other hand, when it is 0.93 g/cm3 or less, the effect of improving the dispersibility of the polyethylene and the polypropylene resin can be easily exhibited. In the case where the LDPE is mixed in the above LLDPE, since the dispersibility of the polyethylene resin and the polypropylene resin is improved, and the aggregation failure strength in the layer A is improved, it is preferable to mix the LDPE with respect to the entire polyethylene. 30% by weight. When the layer A of the present invention uses a high-density polyethylene having a density of 0.94 to 0.97 g/cm 3 (hereinafter referred to as "HDPE"), although the film is excellent in elasticity and curl resistance, on the other hand, it is rubbed by the roller during processing. When the HDPE is peeled off and white powder is generated, there is a problem that the film is contaminated or damaged. It is necessary to pay attention to the fact that the higher the melting point is, the higher the melting temperature of the LLDPE and the LDPE, and the higher the heating temperature at the time of setting the heat with the EVA. Next, in the layer A of the present invention, the polypropylene resin must be mixed in an amount of 50 to 500 parts by weight based on 100 parts by weight of the polyethylene. By mixing 50 to 500 parts by weight of the polypropylene resin, the heat resistance can be improved and the adhesion to the layer B can be improved. When the amount of the polypropylene resin is more than 500 parts by weight, the adhesion to the EVA is insufficient. On the other hand, if the amount is less than 50 parts by weight, the heat resistance and the adhesion improving effect between the B layers are lowered. The term "heat resistance" as used in the present invention means a glass laminate or the like which can withstand 130 to 170 ° C which is carried out in the processing step when used as a back sheet for a solar battery. More specifically, as described above, in the solar cell module 100134724 8 201217163 assembled with a wiring such as a bus bar, the manufacturing of the step by step, the structure of the drum, the Yang Wei (four) Lai glass laminate, the heat of the glass laminate It is important to maintain the thickness of the initial sound at 8〇% from the ^^ power degree, and it is possible to form a t A vy positive battery pack which does not have a wiring member such as a bus bar and has excellent appearance. Since the intrinsic value of the withstand voltage resin such as the dielectric breakdown voltage and the partial discharge voltage is proportional to the thickness: thickness, it is extremely important to ensure the electrical characteristics in the initial design in order to ensure the thickness before the treatment. When the processing temperature is 13 (M耽, the polypropylene resin contains a range of 50 to 250 parts by weight, more preferably a fine part by weight. When the processing temperature is just 70. (10), the poly (four) system The resin contains: a range of 250 parts by weight, more preferably a range of ~(4) = 1/7 The polypropylene resin system can be exemplified by a polyacrylonitrile, a vinylpyrene, a random polymer, and a vinyl ether. • C-stage copolymer, from heat resistant From the viewpoints of film workability, polystyrene dispersibility, and the like, ethylene-propylene block copolymer and homo-polypropylene are preferred. When a copolymer of ethylene and propylene is used, The dilute content is preferably in the range of 1 to I5 mol. / 〇. When the ethylene content is less than i mole %, the dispersibility of the stone or LDPE or the mixed resin is lowered, and the metal roller is used. When the rubber is rubbed by the rubber, the resin is easily peeled off and becomes a cause of white powder, and the adhesion to the EVA is lowered. On the other hand, if it exceeds 15 mol%, there is a thin thickness when it is bonded to the EVA. Reduction, partial discharge power 100134724 9 201217163 The pressure drop occurs. Further, the MFR of the polypropylene resin at 230 ° C is preferably in the range of 1.0 to 15 g / 10 minutes. If the MFR is less than 1.0 g / 10 minutes, Then, in the film forming step, the film width is smaller than the discharge width (necking) of the nozzle, and the stability of the film tends to be difficult to manufacture, so it is preferably avoided. Also, if the MFR is greater than 15 g/10 minutes, the crystal is crystallized. The speed is increased and becomes brittle, so it is best to avoid it. The melting point of the resin is preferably in the range of 140 ° C to 170 ° C from the viewpoints of heat resistance, slidability, film handleability, curl resistance, and thermal adhesion to EVA. In the case of 140 ° C or higher, the layer A has excellent heat resistance, and when it is used as a back sheet for a solar cell and is thermally welded to EVA, it is preferable to suppress problems such as reduction in sheet thickness or partial discharge voltage. It is preferable to set the melting point to 170 ° C or less to ensure excellent adhesion to EVA. Further, by mixing an incompatible polypropylene resin in polyethylene, irregularities are formed on the surface of the film. It can bring excellent slidability. Thereby, when performing film formation and cutting, it is easy to wind and it is excellent in workability. On the other hand, when the slidability is poor, the air mixed by the cutting or the like is not easily removed, and the shape of the film is partially deformed due to the unremoved air, and depending on the case, the films may be blocked from each other. , causing damage to the skin during peeling. The surface average roughness Ra of the layer A of the present invention is 0.10 to 0.30 μηι, and since 100134724 10 201217163 can satisfy the film operation function during processing, it is preferable. In the layer A of the present invention, in order to improve film usability and slidability, inorganic or organic particles having an average particle size of 5 μm of Q (7)% by weight may be added to the resin component of the layer A. As the inorganic particle system, for example, inorganic particles such as wet-gasified yarn, dry dioxane, colloidal dioxy-cut, and carbonic acid can be used, and organic particles can be used, for example, stupid ethylene, polyfluorene, and acrylonitrile. Text? Crosslinked organic particles such as acrylic acid. Among them, the acid (four) inorganic particles are preferably used from the viewpoint of dispersibility of the resin. If the average particle diameter is less than _, the effect of improving the slidability of the film is low, and if the average particle diameter is larger than 5 qing, the particles will fall off from the film and become a cause of contamination or damage, so care must be taken. Further, a lubricant of an organic compound 〇 〜 〜 〇 重量 by weight may be added to the enamel resin component. The slip of the organic compound may, for example, be decyl stearate or calcium stearate. Next, the layer B of the present invention is composed of a polypropylene-based resin composition containing a coloring agent. Here, the "polypropylene-based resin composition" is a polypropylene-based resin which is at least one type of resin selected from the group consisting of homo-polypropylene, ethylene, and (iv) random or block copolymer, or such resins and poly The composition of the ethylene mixed resin is preferably 30% by weight of the total resin component from the viewpoint of impurities. When a copolymer of ethylene and ruthenium is used as the polypropylene resin, the ethylene content is preferably 15 mol% or less from the viewpoint of heat resistance. 100134724 11 201217163 Further, when it is desired to impart strength to the film, a nucleating agent may be added as needed. In this case, a crystal nucleating agent of a CX crystal is preferred, and specific examples thereof include a sorbitol-based or cyclopentadiene-based crystal nucleating agent. The MFR of the polypropylene resin at 230 ° C is preferably in the range of 丨 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 15 When the MFR is less than the i.OgAO fraction, in the film forming step, the film which is melt-extruded from the nozzle is necked, resulting in uneven thickness in the width direction of the film, which makes it difficult to customize the film, and thus is preferably avoided. Also, when the MFR is greater than 15 years and 1 minute, the crystallization rate will increase and become brittle, and (4) it is best avoided. The coloring of the layer B of the present invention is exemplified by an inorganic or organic coloring agent such as titanium oxide, sulfuric acid pigment, carbon black or phthalocyanine compound. Among them, 'the best is titanium oxide particles. For the crystal type, rutile type, anatase, brookite type, etc. are known, and it is preferable from the viewpoints of excellent whiteness, weather resistance, and light reflectivity. It is rutile. f The titanium oxide used in the present invention may be deteriorated by the photocatalytic action of the resin, and thus it is coated on the surface of the photocatalyst, and the composition is not limited, but the composition is not limited. Or an inorganic oxide such as zinc oxide. The surface to be treated is an agent which is obtained by a known method. Further, for example, a hindered amine-based light stabilizer is added for the purpose of stabilization of the titanium oxide particles. However, it is important to select the way in which the village is secondarily agglomerated in the resin. The titanium oxide particles are not caused by θ. 100134724 12 201217163 The average particle diameter of the coloring agent particles used in the present invention is preferably 0.2 to 0, and more preferably 0.25 to 0.3% is used for the purpose of improving visible light reflectance. Further, when used as a back protective sheet for a solar cell, in order to impart heat release property, it is preferred to tilt the infrared light, and it is more preferable that the average particle diameter is 0.35 to 〇. If necessary, by mixing these two (four), the visible light and infrared light incident rate can be improved, because (four) is better. If the average particle size is less than 〇·>, the degree of heterogeneity such as oxidized hooves will be (4), and the cause of deterioration of the raw material lyophile is avoided because of (4). Further, when the average particle diameter exceeds 0, the dispersibility to the resin is deteriorated, and the filter used in the production is clogged, so that it is preferably avoided. Further, the coloring_addition amount of the layer B of the present invention is preferably in the range of 5 to 5 % by weight, although it is about the specific gravity, and preferably in the range of 1 to 3 % by weight. . When the amount of addition is 5% by weight or more, a sufficient whitening and light-reflecting effect can be obtained, and a wiring material such as a bus bar does not permeate: it is excellent in appearance. On the other hand, when the addition of more than the above is made, the whitening property and the hiding property are not increased by k, and the coloring agent is sufficiently dispersed in the resin, and the film forming property of stability can be ensured. Further, in the layer B, cutting chips or the like which are generated when the tantalum film is produced may be used as a raw material for recovery. In terms of frequency, it is preferable to add (5) to the B layer of the film and add 5 to 70% by weight to the B layer of the film because it is excellent in economic efficiency, and it is preferable from the viewpoint of maintaining heat resistance. The polypropylene resin in the B layer is a resin obtained by copolymerizing at least one or more kinds from the minus-segment section of the homo-enes, the olefin (E), and the mixed resin of the resin and the polyethylene. The method of granulating the content of the polyethylene in which the content of the polyethylene is 30% by weight of the entire surface of the fat-free component, and the method of granulating and extruding the cut material is generally performed, but is not limited to this method. The c-layer of the human body is composed of a poly-based resin composition, and the same as the B-layer, from the viewpoint of heat resistance, it is preferably a homopolypropylene, ethylene, and a dilute Among the polypropylene-based resins such as random or block copolymers, one or more kinds of resins are main components, and the polypropylene-based resin contains 7 〇 by weight or more of 'heat resistance, slidability, film handleability, and damage resistance. From the viewpoint of curling property, it is preferred to use homopolypropylene alone. The polypropylene resin is preferably in the range of heat resistance, slidability, _operability, blistering property, and cash curl property. By setting the refining point to 15 (TC or more, heat resistance is excellent, and when it is used as a back sheet for solar cells, there is no temperature and pressure when it is thermally coupled with EVA, and the thickness of the sheet is reduced or partially. The case where the discharge voltage is lowered is preferable, and those having a refining point of more than 17 GC have high stereoregular homopolymer polypropylene, and the degree of crystallization between the b layer and the b layer is too large, and the curling condition of the thin crucible becomes large, resulting in the take-up property. There is a problem, and the adhesion to other substrates is also lowered, and it is necessary to pay attention. The MFR of the polypropylene resin at 230 ° C is preferably in the range of 1.〇~i5g/i〇. When the MFR is less than 1.0g In the case of /l splitting, necking may occur in the film forming step, which leads to difficulty in the stable production of the film. Moreover, when the MFR is greater than 15 g/10 minutes, the crystallization speed will increase, resulting in brittleness, 100134724 14 201217163 A situation must be noted in the film forming step. In addition, when it is desired to impart strength to the film, it is necessary to use a nucleating agent. In this case, it is preferable to add 、a plus ', 口日日华糖Alcohol fw agent, specifically, for example, mountain ▲ sugar knows 糸, % 戊二The crystal nucleating agent is added to the weight of the tree _::= 丨. The polyolefin-based multilayer resin film used for the surface of the solar cell is a solar cell back A: when the wind is 'from the viewpoint of discoloration prevention and strength maintenance, the most Fortunately, the A layer, the B layer, and the c屌 are taken from the Tianshi Batu > island in the aromatic materials, / agents. Antioxidant _ there are hope, Fang, female, system, phosphorus, etc., because a small amount It is preferable to use two or more types in combination. For example, the "anti-effect, the secret (10) read phosphorus system, can be expected to be a "chemical agent." From the viewpoint of thermal stability during extrusion and weather resistance, the antioxidant is preferably added to Sumitomo. The chemical S:mill=GP"° addition amount is preferably 0.05 to 0.35 scoop in the range of the S layer resin. If the addition amount is less than 0.05% by weight, the effect is lowered, and if it is more than G.35 wt%, the dispersion is dispersed. Further, in the case where at least i or more of the layers A, B, and c of the present invention are improved in terms of discoloration prevention and weather resistance when the back surface of the solar cell is used. Other additives other than the above may be contained. 'The other additives may be, for example, a light stabilizer, ultraviolet rays. Receptor, heat stabilizer, light stabilizer, can be used to prevent phosgenation of the living species that can prevent photodegradation in the resin. Specifically, it can be used to block the β-lanthanide from the hindered amine. One or a combination of compounds, among others, etc. 2 100134724 15 201217163

種以上者。其中較佳係使用受阻胺系化合物。特別係若在B 層中依0.5〜5.0重量％的範圍混合絲定劑，當著色化劑使 用氧化鈦時便可使該氧化鈦安定化，可料長期耐候性，因 而較佳。若添加量未滿〇 5重量％，則t作光安定劑的效果 不足’反之若超過5.G重量％，則會成為渗出或氧化欽等無 機粒子出現凝集的原因。 上述紫外線吸收劑係可使用會吸收太陽光中的有害紫外 線，並在分子内轉換為無害的熱能，防止樹脂中的光劣化開 始之活I1生種被激發者。具體而言係可使用從二苯基酮系、苯 并二唑系、水揚酸酯系、丙烯腈系、金屬錯鹽系、受阻胺系、 及超U粒子氧化鈦(粒徑：〇 〇1μιη〜〇.〇6μιη)或超微粒子氧化 鋅（粒徑：0.01阿〜0.04㈣等無機系等之紫外線吸收劑所構 成群組中選擇之至少1種以上者。 再者上述熱安疋劑係可舉例如參似二第王丁基笨其) 伽旨、雙[2,4·雙基乙基)_基苯基]乙基醋亞^ 酸、肆似·二第三丁基苯基)[U·聯苯基Μ,4,·二基雙亞鱗酸 醋、及雙(2,4-二第三丁基苯基)季戊四醇二亞構酸醋等鱗系 :、安疋齊J，以及8-減-5,7-二第三丁基“夫喃_2_酮與鄰二甲 苯的反應生成物等内I系熱安定劑。X，該等係可使用！ 種或種類以Jl其中’較佳係併用碌系熱安定劑與内 熱安定劑。 上述紫外線吸收劑、熱蚊劑等混合物的含有量，相對於 100134724 201217163 各層的樹脂組成較佳在0.01〜10.0重量％之範圍内。 再者，本發明的薄膜中視需要亦可添加難燃劑。難燃劑並 無特別的限定，可使用有機難燃劑、無機難燃劑等公知技術 物。有機難燃劑的例子係分子中含有1個以上之氯原子或溴 原子者，例如氯化烷烴、氯化聚乙烯、六氯内-亞甲基-四氫 苯二甲酸、全氯五環癸烷、四氯化酞酸酐等；或參(2,3-二溴 丙基）三聚異氰酸酯等具有芳香環且該芳香環並未直接鍵 結鹵原子的單體或聚合物；或1,1,2,2-四溴乙烷、1,4-二溴丁 烷、1，3-二溴 丁烷、1,5-二溴戊烷、α-溴丁酸乙酯、1，2,5,6,9，10-六溴環癸烷等未具有芳香環者。 再者，無機難燃劑的例子係可舉例如氫氧化鋁、氫氧化鎂 等氫氧化無機鹽；磷酸銨、磷酸鋅等磷酸化物；紅磷、三氧 化銻、膨脹石墨等。 有機難燃劑與無機難燃劑的單獨或混合物之調配量相對 於各層的樹脂較佳為5〜30重量％的範圍。若添加量未滿5 重量％，則不具添加效果，反之若超過30重量％，則會有 分散性惡化或因難燃劑而引發著色的情況。 本發明的薄膜厚度係依照所使用之太陽電池的構造而有 所變化，但從薄膜製造面及與其他基材間之層壓加工性觀 之，較佳係10〜200μιη之範圍，更佳係20〜150μιη之範圍。 本發明的薄膜係由Α層/Β層/C層所構成，其積層比並無 特別的限定，較佳係A層、C層分別為5〜20%、B層則為 100134724 17 201217163 90〜60%範圍。如上述，藉由設為八層/6層/c層，藉由使含 有著色化綱B倾A層與C層所夾置，便可抑制製造時 在噴嘴上附著含有大量粒子的樹脂分㈣，俾可俾免因分解 物的脫落而造成步驟污染或薄祺損傷等品質問題。 本發明薄膜的楊氏模數值’從製膜時的捲取性及層壓等二 次加工時的取用性觀點而言，較佳為3〇〇〜丨〇〇〇Mpa之範圍。 當將本發明薄膜使用為太陽電池背面保護片時，係構成為 A層位於太陽電池之入射面側的狀態。藉由使入射面側所使 用之填充材EVA與A層相接觸，便可具有優異的熱接著性。 再者，在與其他素材間利用接著劑提升接著性之目的下， 車乂佳係對C層施行易接著處理，易接著處理係可舉例如電 暈放電處理、電漿處理、化學處理等方法，其中較佳係低成 本的電暈放電處理。此時的潤濕張力較佳係35〜55mN/m之 範圍。 本發明的薄膜係可經與其他基材利用接著劑、熱熔接等方 法施行層壓後才使用。其他基材係可舉例如鋁箔、紙、熱可 塑性樹脂薄膜等。熱可塑性樹脂係可舉例如聚對苯二曱酸乙 一 S曰t萘一曱酸乙二酯、聚對苯二甲酸丙二酯、聚對苯二 甲酸丁•伸環己基二亞甲基對喊酯等聚醋；聚 苯乙烯、㈣腈•苯乙烯共聚合體等笨乙烯系樹脂；聚碳酸 酯、聚醯胺、聚_、聚胺甲酸、聚笨硫3迷、聚醋酿胺、聚 賴、聚氯乙稀、聚甲基丙職s旨、改質聚㈣、聚芳醋、 100134724 18 201217163 水石風«亞胺、聚酿胺酿亞胺、聚酿亞胺、以及以該等 為主要成分的共聚合體、或該等樹脂的混合等 。尤其，在本 發月t彳<尺寸安定性、機械特性良好的觀點而言，較佳為 聚S旨’更佳為雙輪延伸聚對苯二甲酸乙二g旨薄膜（以下簡稱 「PET薄膜」）。 由上述本發明薄膜與pET薄膜進行積層的太陽電池背面 保護片’其A層面側的56〇mn光反射率較佳係85%以上、 更佳係90。/。以上。藉由使a層面的56〇mn反射率在85%以 上，可提升太陽電池的發電效率，因而較佳。 以下’針對製造本發明之聚烯烴系樹脂多層薄膜的方法進 行具體說明。另外’本發明薄膜的製造方法並不僅侷限於此。 A層所使用的樹脂係使用在熔點u〇t：〜13(rc範圍的 LLDPE 100重量份中混合入聚丙烯系樹脂5〇〜5〇〇重量份的 樹脂混合物。 B層所使用的樹脂係使用在熔點14(rc〜17(rc範圍的聚丙 烯系樹脂中混合入當作著色化劑用的金紅石型氧化鈦5〜5〇 重1 %、以及當作抗氧化劑用的r SumilizerGP」〇.〇5〜〇 35 重量％範圍之樹脂混合物。 C層所使用的樹脂係使用熔點15〇〜n〇°C的聚丙婦系樹 脂。將依此所準備的樹脂分別供應給各自的單螺桿熔融擠出 機’並分別依220〜280°C之範圍進行熔融。然後，通過在聚 合物管途中所設置的過濾器，去除異物、粗大無機粒子等之 100134724 19 201217163 後，顧在乡歧M T賴《 τ龍社㈣設置的分 流—ed block)，施行Α層/Β秋層型的3種3層積層， 並利用Τ型模頭於旋轉金屬親上依C層側為金屬輕面側的 方式吐出，獲得未延伸薄膜。此時，未了不致發生C層黏 著於金屬輕並且提南結晶性，最好將旋轉金屬輥的表面溫度 控制於20〜60。。。又’為了使熔融聚合物密接於金屬輥，較 佳係從非金屬輥側吹出空氣的方法、或使用夾親。 依此所獲得之本發日㈣膜的C層，為了與其他基材進行 貼。係在工氣中或氮氣、二氧化碳之i種以上的環境中施 行電暈放電處理’使表面的潤濕張力成為35mN/m以上並施 行捲取。 本發明的輯㈣樹脂多層薄膜係可適合使用於太陽電 池背面保護片。太陽電池背面保護片係可使用例如將厚度 25〜250μηι的耐水解性ΡΕΊΓ薄膜(T〇RAY(股）：「Lumirr〇r」 XI0S)與本發明之聚烯煙系多層積層薄膜使用公知接著劑 施行乾式層壓者。 [實施例] 以下，利用實施例針對本發明進行詳細說明。另外，特性 係依照以下方法進行測定、評價。 (1)薄膜厚度及厚度構成比率 薄膜厚度係使用指示量表（Peacock公司製，RIGHTUP DIALGAUGE)，依據 JIS K7130(1992 年)A-2 法，針對薄膜 100134724 20 201217163 的任意1G個地方測定厚度。將其平均值除以iq，定為「薄 膜厚度」，陣單位的小數點以下四捨五人。又，積層薄膜時 的各層厚度’係㈣層•包藏於魏樹脂巾並使用切片機 切取薄膜截面，利用偏光顯微鏡(Nik〇n公司製，eclipse E400 POL)依2〇(H吾的倍率觀察該截面，並求取積層各層的 厚度比率。 (2) 密度測定方法 密度係依照（ASTM) D1505進行測定。 (3) MFR之測定方法 LLDPE、LDPE的炼融指數(娜R)係依據ASTm D1238， 依190°C、2.16kg進行測定，又，同元聚丙烯、乙烯•丙烯 嵌段共聚合體、乙烯•丙烯無規共聚合體的MFR係依 230°C、2.16kg 進行測定。 (4) 熔點測定 所使用樹脂的熔點係使用示差掃描熱量計（島津製作所 製’ DSC-60) ’從20°C起依1(TC/分的速度升溫，將加熱至 300°C時的熔解尖峰之最高尖峰溫度設為熔點。 (5) 太陽電池背片之製造方法 在雙軸延伸聚酯薄膜(TORAY(股）製，「Lumirror」X10S 125μιη)上，將2液硬化式接著劑（大日本油墨化學工業（股)More than one. Among them, a hindered amine compound is preferably used. In particular, when the silking agent is mixed in the range of 0.5 to 5.0% by weight in the layer B, when the titanium oxide is used as the coloring agent, the titanium oxide can be stabilized, and the weather resistance is long-term, which is preferable. If the amount of addition is less than 5% by weight, the effect of t as a light stabilizer is insufficient. On the other hand, if it exceeds 5. G weight%, aggregation of inorganic particles such as bleed or oxidized particles may occur. The above ultraviolet absorbing agent can be used to absorb harmful ultraviolet rays in sunlight and convert it into harmless heat energy in the molecule, thereby preventing the photo-deterioration in the resin from starting. Specifically, a diphenyl ketone type, a benzobisazole type, a salicylate type, an acrylonitrile type, a metal wrong salt type, a hindered amine type, and a super U particle titanium oxide (particle size: 〇〇 can be used) At least one selected from the group consisting of ultraviolet ray absorbents such as inorganic particles such as 0.01 μm η 〇 〇 μ μ μ μ μ 或 超 超 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 For example, it may be exemplified by diol, bis (2,4·diylethyl)-phenyl]ethyl acetoacetate, oxime-like di-tert-butylphenyl) [U · Biphenyl hydrazine, 4, · diyl double squamous acid vinegar, and bis (2,4-di-t-butylphenyl) pentaerythritol di-eutectic acid vinegar and other scales: Anzhen Qi J, and 8 - Reduction of the reaction product of -5,7-di-t-butyl"-propan-2-one and o-xylene, etc. I. Thermal stabilizer. X, these systems can be used! Species or species are Jl Preferably, the thermal stabilizer and the internal heat stabilizer are used in combination. The content of the mixture of the ultraviolet absorber, the heat mosquito, and the like is preferably in the range of 0.01 to 10.0% by weight based on the resin composition of each layer of 100134724 201217163. Further, a flame retardant may be added to the film of the present invention as needed. The flame retardant is not particularly limited, and known techniques such as an organic flame retardant or an inorganic flame retardant can be used. Examples of the organic flame retardant are in the molecule. a compound containing one or more chlorine atoms or bromine atoms, such as a chlorinated alkane, a chlorinated polyethylene, a hexachloro-methylene-tetrahydrophthalic acid, a perchloropentacyclononane, a tetrachlorophosphonium anhydride or the like; Or a monomer or polymer having an aromatic ring such as (2,3-dibromopropyl)triisocyanate and which does not directly bond a halogen atom; or 1,1,2,2-tetrabromoethane , 1,4-dibromobutane, 1,3-dibromobutane, 1,5-dibromopentane, ethyl α-bromobutyrate, 1,2,5,6,9,10-hexabromo Examples of the inorganic flame retardant include a hydroxide inorganic salt such as aluminum hydroxide or magnesium hydroxide; a phosphate such as ammonium phosphate or zinc phosphate; red phosphorus and trioxide.锑, expanded graphite, etc. The amount of the organic flame retardant and the inorganic flame retardant alone or in a mixture is preferably in the range of 5 to 30% by weight based on the resin of each layer. When the amount is more than 30% by weight, the dispersibility is deteriorated or the coloring is caused by the flame retardant. The film thickness of the present invention varies depending on the structure of the solar cell to be used. However, it is preferably in the range of 10 to 200 μm, more preferably in the range of 20 to 150 μm from the viewpoint of lamination workability between the film production surface and other substrates. The film of the present invention is composed of a layer of ruthenium/ruthenium/ The layer C is composed of a layer C, and the layer ratio is not particularly limited. Preferably, the layers A and C are 5 to 20%, and the layer B is 100134724 17 201217163 90 to 60%. As described above, it is set to eight. The layer/6 layer/c layer can suppress the adhesion of the resin containing a large amount of particles to the nozzle at the time of manufacture by sandwiching the layer A and the layer C, which can be used to prevent decomposition of the resin. The shedding causes quality problems such as step contamination or thinning damage. The Young's modulus value ' of the film of the present invention is preferably in the range of 3 Å to 丨〇〇〇 Mpa from the viewpoints of the windability at the time of film formation and the workability at the time of secondary processing such as lamination. When the film of the present invention is used as a solar cell back surface protective sheet, the layer A is placed on the incident surface side of the solar cell. By having the filler EVA used on the side of the incident surface in contact with the layer A, it is possible to have excellent thermal adhesion. Furthermore, in the purpose of improving the adhesion between the other materials and the use of the adhesive, the ruthenium system can easily perform the subsequent treatment on the C layer, and the subsequent processing system can be, for example, corona discharge treatment, plasma treatment, chemical treatment, and the like. Among them, a low-cost corona discharge treatment is preferred. The wetting tension at this time is preferably in the range of 35 to 55 mN/m. The film of the present invention can be used after being laminated with other substrates by an adhesive, heat welding or the like. The other substrate may, for example, be an aluminum foil, paper, or a thermoplastic resin film. The thermoplastic resin may, for example, be polyethylene terephthalate, ethyl succinate, polyethylene terephthalate, polybutylene terephthalate or cyclohexyl dimethylene. Polyesters such as esters; stupid vinyl resins such as polystyrene, (tetra) nitrile and styrene copolymers; polycarbonate, polyamine, poly-, polyamines, polystyrene, polyacetamide, poly-lysine , polyvinyl chloride, polymethyl propyl s, modified poly (four), poly vinegar, 100134724 18 201217163 water stone wind «imine, polyamine, imine, and so on a copolymer of the components, or a mixture of the resins, and the like. In particular, in view of the fact that the dimensional stability and mechanical properties are good in the present month, it is preferable that the poly-S are intended to be more preferably a two-wheel extended polyethylene terephthalate film (hereinafter referred to as "PET". film"). The solar cell back surface protective sheet which is laminated with the pET film of the present invention has a light reflectance of 56 〇 mn on the A layer side of 85% or more, more preferably 90. /. the above. It is preferable to increase the power generation efficiency of the solar cell by making the 56 〇 mn reflectance of the a layer above 85%. Hereinafter, the method for producing the polyolefin-based resin multilayer film of the present invention will be specifically described. Further, the method of producing the film of the present invention is not limited thereto. The resin used in the layer A is a resin mixture which is mixed with a polypropylene resin at a melting point of 〇t: 〜13 (100 parts by weight of LLDPE in a range of 5 to 5 parts by weight). In the melting point of 14 (rc~17), the rutile-type titanium oxide used as a coloring agent is mixed with a rutile-type titanium oxide, which is 5 to 5 〇, and 1% by weight, and r Sumilizer GP which is used as an antioxidant. 〇5~〇35% by weight of the resin mixture. The resin used for the C layer is a polypropylene-based resin having a melting point of 15〇~n〇°C. The resins prepared according to this are supplied to the respective single-screw melts. The extruder is melted according to the range of 220 to 280 ° C. Then, through the filter provided on the way of the polymer tube, the foreign matter, coarse inorganic particles, etc. are removed, and 100134724 19 201217163 "Diversion-ed block set up by τ 龙社 (4), three kinds of three-layered layers of the Α layer/Β秋层 type are implemented, and the 模-type die is used on the rotating metal to be on the side of the C layer as the light side of the metal side. Spit out and obtain an unstretched film. At this time, it does not happen. Adhesive to the metal light and the southwest crystallinity, it is preferable to control the surface temperature of the rotating metal roll to 20 to 60. Further, in order to make the molten polymer adhere to the metal roll, it is preferable to blow air from the non-metal roll side. The method or the use of the clip. The C layer of the film obtained according to the above-mentioned (4) film is attached to other substrates, and is subjected to corona discharge treatment in an environment of gas or nitrogen or carbon dioxide. 'The wetting tension of the surface is 35 mN/m or more and is wound up. The (4) resin multilayer film of the present invention can be suitably used for a solar cell back surface protective sheet. For example, the solar cell back surface protective sheet can be used, for example, to have a thickness of 25 to 250 μm. The hydrolysis-resistant ruthenium film (T〇RAY ("Lumirr〇r" XI0S) and the polyene-based multi-layer laminated film of the present invention are dry-laminated using a known adhesive. [Examples] The present invention will be described in detail. The characteristics are measured and evaluated according to the following methods. (1) Film thickness and thickness composition ratio Film thickness is used in the indicator scale (Peacock) RIGHTUP DIALGAUGE), according to JIS K7130 (1992) A-2 method, the thickness is measured for any 1G place of film 100134724 20 201217163. The average value is divided by iq, which is defined as "film thickness", the decimal of the array unit The following is a circle of five people. In addition, the thickness of each layer when the film is laminated is a layer of four layers. It is wrapped in a Wei resin towel and cut into a film section using a microtome. Using a polarizing microscope (eclipse E400 POL, manufactured by Nik〇n Co., Ltd.) The cross section of H is observed, and the thickness ratio of each layer of the laminate is obtained. (2) Density measurement method Density is measured in accordance with (ASTM) D1505. (3) Measurement method of MFR The smelting index of LLDPE and LDPE (Na R) is determined according to ASTm D1238, according to 190 ° C, 2.16 kg, and the same, polypropylene, ethylene and propylene block copolymer, ethylene • The MFR of the propylene random copolymer was measured at 230 ° C and 2.16 kg. (4) The melting point of the resin used for the measurement of the melting point is a differential scanning calorimeter ('DSC-60, manufactured by Shimadzu Corporation'). The temperature is raised from 20 °C to 1 (the temperature is raised at a rate of TC/min, and the melting is performed when heated to 300 °C). The peak temperature of the peak is set to the melting point. (5) Method for manufacturing solar cell backsheet A biaxially stretched polyester film ("Rayramror" X10S 125μιη, manufactured by TORAY Co., Ltd.), a 2-liquid hardening adhesive (large Japan Ink Chemical Industry Co., Ltd.

製’LX-903/KL-75=8/l)塗佈成固形分塗佈厚度6μιη，依80°C 乾燥後，與本發明之聚烯烴系樹脂多層薄膜的C層側之電 100134724 21 201217163 暈處理面重疊，通過1對加壓輥間而製成積層體。該積層的 薄膜係依溫度40°C施行72小時熟成，促進接著劑層的硬化 反應’形成太陽電池背面保護片。 (6) 反射率 針對(5)所獲得之太陽電池背面保護片的A層面，依在分 光光度計（曰立製作所製U-3410)上安裝¢60積分球（日立製 作所公司製，130-0632)及10度傾斜間隔件的狀態，測定 560nm之絕對反射率計3次，求取平均值，將其定為反射 率。及格與否的判斷係將反射率85%以上者評為「合格」， 將未滿85%者評為「不合格」。 (7) 财熱性試驗 如圖1所示，使用（5)所製成的太陽電池背面保護片F，依 太陽電池背面保護片F的A層接觸到EVA的層B之方式， 依圖1所示順序積層玻璃板A/EVA(SANVIC(股）製， PV-45FR00S 450μηι)的層 B/銅板 C(寬 2mmx厚 0.6mm)/EVA 的層Β(450μηι)/由聚烯烴系樹脂多層薄膜D與雙軸延伸PET 薄膜E構成的太陽電池背面保護片F，設置於NPC(股）製的 太陽電池模組層壓機(LM-50X50-S)後，依真空時間4分鐘、 控制時間1分鐘、壓製時間15分鐘、溫度140°C的條件施 行加熱壓接。經壓接後冷卻至室溫，製成模擬模組。The coating of 'LX-903/KL-75=8/l) is applied to a solid coating thickness of 6 μm, and dried at 80 ° C, and the electricity of the C layer side of the polyolefin-based resin multilayer film of the present invention is 100134724 21 201217163 The halo treatment surfaces are overlapped, and a laminated body is formed by passing between a pair of pressure rollers. The laminated film was aged at a temperature of 40 ° C for 72 hours to promote the hardening reaction of the adhesive layer to form a solar cell back protective sheet. (6) Reflectance For the A-layer of the solar cell back protective sheet obtained in (5), a ¢60 integrating sphere is mounted on a spectrophotometer (U-3410 manufactured by 曰立工厂) (made by Hitachi, Ltd., 130-0632) And the state of the 10-degree inclined spacer, the absolute reflectance meter of 560 nm was measured three times, and the average value was calculated, and this was set as the reflectance. The judgement of passing or not is rated as "qualified" by those with a reflectance of 85% or more, and "unqualified" by those who are less than 85%. (7) The heat recovery test is as shown in Fig. 1, using the solar cell back protective sheet F made in (5), according to the way that the layer A of the solar cell back protective sheet F contacts the layer B of the EVA, according to Fig. 1 Layer B/copper plate C (width 2 mm x thickness 0.6 mm) / EVA layer 450 (450 μηι) of sequential laminated glass plate A/EVA (made of SANVIC, PV-45FR00S 450μηι) / polyolefin-based resin multilayer film D The solar cell back surface protection sheet F composed of the biaxially stretched PET film E is placed in a solar cell module laminator (LM-50X50-S) manufactured by NPC, and is controlled by a vacuum time of 4 minutes and a control time of 1 minute. The press-pressing time was performed for 15 minutes at a temperature of 140 ° C. After crimping, it was cooled to room temperature to make a simulation module.

依上述方法製成各水準1〇片，從太陽電池背片侧，使用 20001X 的 LED 光源（Swan 電器公司製，LEDICEXARM LED 100134724 22 201217163According to the above method, each level 1 sheet is made, and from the back side of the solar battery, a 20001X LED light source (LEDCICE ARM 100100724 22 201217163) is used.

DeskLight LEX-951 WH Garage)，利用反射光進行目視觀 察。透視的判定係依照下述基準，將完全無法看到銅板顏色 者评為「合格」，即便有部分性能目視到銅板顏色者亦評為 「透出」。 + + . 1〇片完全沒有銅板透出。 + : !〇片中有1片銅板透出。 — :片中有2片以上的銅版透出。 (8) 厚度觀察 在(7)所獲得之模擬模組積層體靠玻璃面側的Eva上，預 先利用單面刀劃上龜裂後，從背片側再度使用單面刀切斷。 然後，對重疊於銅板之部分的切斷面，利用偏光顯微鏡 (Nikon公司製’ ECLIPSE E400 POL)依200倍之倍率進行觀 察針對薄膜全體的厚度依處理前後進行比較，並依下述基 準進行判定。 + + :厚度變化未滿_5〇/〇 + :厚度變化-5%以上且未滿_2〇% — :厚度變化-20%以上 (9) 與EVA的熱接著強度測定 使用（7)所製成的模擬模組，如下述測定太陽電池背片與 EVA的接著強度。 從背片側依寬15mm實施樣品裁切，於太陽電池背片/EVA 層間剝離，在室溫條件下，使用〇RIENTEC公司製萬能試 100134724 23 201217163 驗機（tensilon)PTM-50，依剝離角度180°、剝離速度 300mm/min進行剝離，並評價接著強度’依下述基準進行 判定。 + + :剝離強度為70N/15mm以上 + :剝離強度未滿70N/15mm、且40N/15mm以上 - :剝離強度未滿40N/15mm ——:聚烯烴系樹脂多層薄膜的積層界面出現剝離 (10)EYE SUPER照射144小時後的色調變化測定 將（5)所製成的太陽電池背面保護片施行樣品裁切為 50mmx50mm大小，將該試驗片使用EYE SUPER UV測試 儀（岩崎電氣股份有限公司製)(照射強度：100mW/cm2,照射 距離：240mm)施行144小時，利用分光測色計（Konica Minolta製CM-5)測定經耐候性試驗後的色差AE。由測定 結果依下述基準進行判定。 + + : ΔΕ 未滿 3.0 + : ΔΕ為3.0以上且5.0以下 — :ΔΕ為5.0以上 以下’針對本發明的實施例及比較例進行說明。 (氧化鈦母料A之製造方法） 將熔點162°C、密度0.900g/cm3的同元聚丙烯40重量％、 與經無機氧化物施行表面處理的平均粒徑2〇〇nm之金紅石 型氧化鈦(堺化學工業公司製’ FTR-700)60重量0/〇，使用雙 100134724 24 201217163 螺桿播出機依240°C進行熔融混練後，施行股料切割，製造 氧化欽母料A。 (氧化鈦母料B之製造方法） 將溶點 122。(：、密度 0.922g/cm3、MFR7g/10 分的 LLDPE(40 重里％)與經無機氧化物施行表面處理的平均粒徑2〇〇nm之 . 金紅石型氧化鈦(堺化學工業公司製，FTR-700)60重量％， 使用雙螺桿擠出機依21(TC進行熔融混練後，施行股料切 割’製造氧化鈦母料B。 (受阻胺系光安定劑母料A之製造方法） 將熔點 122°C、密度 0.922g/cm3、MFR7gn〇 分的 LLDPE(90 重量％)與受阻胺系化合物（Ciba Japan製TINUVIN®(註冊 商標）622-LD)10重量％，使用雙螺桿擠出機依21〇〇C進行熔 融混練後，施行股料切割，製造受阻胺系光安定劑母料。 (受阻胺系光安定劑母料B之製造方法） 將熔點162°C、密度0.900g/cm3的同元聚丙烯與受阻胺系 化合物（Ciba Japan 製 TINUVIN®(註冊商標)622-LD) 10 重 „ 量％，使用雙螺桿擠出機依240°C進行熔融混練後，施行股 . 料切割，製造受阻胺系光安定劑母料。 (苯并三唑系紫外線吸收劑母料A之製造方法） 將熔點 122°C、密度 0.922g/cm3、MFR7g/l〇 分的 LLDPE(90 重量％)與苯并三唑系紫外線吸收劑（Ciba Japan製 TINUVIN®(註冊商標）326)10重量％使用雙螺桿播出機依 100134724 25 201217163 210°C進行熔融混練後，施行股料切割，製造苯并三唑系紫 外線吸收劑母料。 (苯并三唑系紫外線吸收劑母料B之製造方法） 將熔點162°C、密度0.900g/cm3的同元聚丙烯與苯并三唑 系紫外線吸收劑（Ciba Japan製 TINUVIN®(註冊商 標)326)10重量％，使用雙螺桿擠出機依240。(：進行熔融混練 後’施行股料切吾！1 ’製造本弁三β坐系紫外線吸收劑母料。 (奈米鋅鈦母料Α之製造方法） 將熔點 122°C、密度 〇.922g/cm3、MFR7g/10 分的 LLDPE(90 重量％)與平均粒徑〇.〇2μπι的氧化鋅粒子（堺化學製 NANOFINE(註冊商標）100-LP)10重量％，使用雙螺桿擠出 機依210°C進行熔融混練後，施行股料切割，製造受阻胺系 光安定劑母料。 (奈米鋅鈦母料B之製造方法） 將熔點162°C、密度0.900g/cm3的同元聚丙烯90重量％ 與平均粒徑0.02μιη的氧化鋅粒子(；t界化學製NANOFINE(註 冊商標）100-LP)10重量％ ’使用雙螺桿擠出機依24〇°C進行 熔融混練後’施行股料切割，製造受阻胺系光安定劑母料。 (實施例1) 作為A層所使用的樹脂，係使用相對於熔點ι27ΐ、密度 0.940g/cm3、MFR5.0g/10 分的 LLDPE 80 重量份，混合入炼 點 112°C、密度 0.912g/cm3、MFR4.0g/l〇 分的 Ldpe 20 重 100134724 26DeskLight LEX-951 WH Garage), using a reflected light for visual inspection. The judgment of the fluoroscopy is based on the following criteria, and those who are completely incapable of seeing the color of the copper plate are rated as "qualified", and even if some of the properties are visually observed, the color of the copper plate is also rated as "exhibited". + + . 1 〇 film has no copper plate at all. + : ! There is a piece of copper in the bracts. — : There are more than 2 copper plates in the film. (8) Thickness observation In the Eva of the simulation module laminated body obtained in (7) on the glass surface side, the single-sided knife is used to pre-crack, and then the one-side knife is used again to cut off from the back sheet side. Then, the cut surface of the portion overlapping the copper plate was observed by a polarizing microscope ("ECLIPSE E400 POL" manufactured by Nikon Corporation) at a magnification of 200 times, and the thickness of the entire film was compared before and after the treatment, and was determined according to the following criteria. . + + : thickness change is less than _5〇/〇+: thickness change - 5% or more and less than _2〇% - : thickness change -20% or more (9) Determination of thermal adhesion strength with EVA (7) The resulting analog module measures the adhesion strength of the solar cell backsheet to the EVA as described below. The sample was cut from the side of the back sheet by a width of 15 mm, and peeled off between the solar cell back sheet/EVA layer. At room temperature, a universal test 100 134 724 23 201217163 tensilon PTM-50 was used at a peeling angle of 180. °, the peeling speed was 300 mm/min, and the peeling was performed, and the evaluation of the subsequent strength was determined according to the following criteria. + + : Peeling strength is 70N/15mm or more + : Peeling strength is less than 70N/15mm, and 40N/15mm or more - : Peeling strength is less than 40N/15mm ——: Peeling at the laminated interface of the polyolefin-based resin multilayer film (10 ) Measurement of color change after EYE SUPER irradiation for 144 hours The sample of the solar cell back protective sheet prepared in (5) was cut into a size of 50 mm x 50 mm, and the test piece was used in an EYE SUPER UV tester (manufactured by Iwasaki Electric Co., Ltd.). (Irradiation intensity: 100 mW/cm2, irradiation distance: 240 mm) was carried out for 144 hours, and the color difference AE after the weather resistance test was measured by a spectrophotometer (CM-5 manufactured by Konica Minolta). The measurement results were judged based on the following criteria. + + : ΔΕ is less than 3.0 + : ΔΕ is 3.0 or more and 5.0 or less — : ΔΕ is 5.0 or more. Hereinafter, examples and comparative examples of the present invention will be described. (Manufacturing Method of Titanium Dioxide Masterbatch A) 40% by weight of a homopolymer polypropylene having a melting point of 162 ° C and a density of 0.900 g/cm 3 and a rutile type having an average particle diameter of 2 〇〇 nm surface-treated with an inorganic oxide Titanium oxide (FTR-700, manufactured by Nippon Chemical Industry Co., Ltd.) 60 wt0/〇, using a double 100134724 24 201217163 screw-on-air machine to perform melt-kneading at 240 ° C, and then cutting the strands to produce a oxidized masterbatch A. (Manufacturing method of titanium oxide masterbatch B) The melting point 122 is obtained. (: LLDPE (40% by weight) having a density of 0.922 g/cm3, MFR 7 g/10 minutes, and an average particle diameter of 2 〇〇nm by surface treatment with an inorganic oxide. Rutile type titanium oxide (manufactured by Daimling Chemical Industry Co., Ltd., FTR-700) 60% by weight, using a twin-screw extruder to produce titanium oxide masterbatch B according to 21 (melt kneading after TC is melt-kneaded) (manufacturing method of hindered amine-based light stabilizer masterbatch A) LLDPE (90% by weight) having a melting point of 122 ° C, a density of 0.922 g/cm 3 , MFR 7 gn, and a hindered amine compound (TINUVIN® (registered trademark) 622-LD by Ciba Japan) 10% by weight, using a twin-screw extruder After melt-kneading at 21 ° C, the strands were cut to produce a hindered amine light stabilizer masterbatch. (Manufacturing method of hindered amine light stabilizer masterbatch B) The melting point was 162 ° C and the density was 0.900 g/cm 3 . The homopolymer polypropylene and the hindered amine compound (TINUVIN® (registered trademark) 622-LD manufactured by Ciba Japan) 10 重量%, using a twin-screw extruder for melt-kneading at 240 ° C, the stock is cut. , manufacture of hindered amine light stabilizer masterbatch. (benzotriazole UV absorber masterbatch Method for producing A) LLDPE (90% by weight) having a melting point of 122 ° C, a density of 0.922 g/cm 3 , and a MFR of 7 g/l, and a benzotriazole-based ultraviolet absorber (TINUVIN® (registered trademark) 326 by Ciba Japan) 10% by weight was melt-kneaded using a twin-screw extruder according to 100134724 25 201217163 at 210 ° C, and then subjected to strand cutting to produce a benzotriazole-based ultraviolet absorber master batch. (Benzene triazole-based ultraviolet absorber masterbatch B (Manufacturing method) 10% by weight of a homopolymer polypropylene having a melting point of 162 ° C and a density of 0.900 g/cm 3 and a benzotriazole-based ultraviolet absorber (TINUVIN® (registered trademark) 326 manufactured by Ciba Japan), using twin-screw extrusion Machine according to 240. (: After the melt-kneading, 'Execution of the stock cuts! 1' to manufacture the base of the three-seat UV absorber masterbatch. (Manufacturing method of nano zinc-titanium masterbatch) will have a melting point of 122 ° C, LLDPE (90% by weight) having a density of 922 922 g/cm 3 , MFR 7 g/10 minutes, and 10% by weight of zinc oxide particles (NANOFINE (registered trademark) 100-LP manufactured by Nippon Chemical Co., Ltd.) having an average particle diameter of 〇 2 μm, using a twin screw After the extruder is melt-kneaded at 210 ° C, the strands are cut and manufactured. Amine-resistant light stabilizer masterbatch. (Manufacturing method of nano zinc-titanium masterbatch B) 90% by weight of homopolymer polypropylene having a melting point of 162 ° C and a density of 0.900 g/cm 3 and zinc oxide particles having an average particle diameter of 0.02 μm (N-Fen Chemicals NANOFINE (registered trademark) 100-LP) 10% by weight 'After melt-kneading at 24 ° C using a twin-screw extruder, 'cutting of the strands was performed to produce a hindered amine light stabilizer masterbatch. (Example 1) As the resin used for the layer A, 80 parts by weight of LLDPE with a melting point of 127 Å, a density of 0.940 g/cm3, and an MFR of 5.0 g/10 minutes was used, and the mixture was mixed at a melting point of 112 ° C and a density of 0.912 g / Cd3, MFR4.0g/l, Ldpe 20, weight 100134724 26

S 201217163 量份（聚乙烯合計100重量份）、及當作聚丙烯系樹脂用的熔 點150°C、密度0.900g/cm3、MFR7g/10分且乙烯含有量4 莫耳。/。的乙烯•丙烯無規共聚合體（以下簡稱「EPC」）100 重量份之樹脂混合物。 作為B層所使用的樹脂’係使用相對於熔點16〇。〇、密度 0.90g/cm3、MFR7g/10分的同元聚丙烯（以下簡稱「h-PP」)1〇〇 重里伤’/見合入氧化鈦母料A 30重量份的樹脂混合物。屬 於著色化劑的氧化鈦添加量係13.8重量％。 再者’作為C層所使用的樹脂’係使用熔點i6〇〇c、密度 0.900g/cm3、MFR4.0g/l〇分、乙烯含有量7莫耳％的乙烯· 丙烯嵌段共聚合樹脂（以下簡稱「B_PP」）。 將依此所準備的Α層、Β層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，分別依26〇。〇熔融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 30 C的澆注滾筒上，從非滾筒面側吹出25。〇冷風而冷卻固 化’獲得各層厚度構成比率為Α層/Β層/c層=10%/80%/10% 且溥膜厚度150μηι之聚烯烴系樹脂多層薄膜。 對該多層薄膜的C側施行電暈放電處理，使表面的潤濕 張力為40mN/m並捲取。 將本發明所得之樣品薄膜的電暈處理面與雙軸延伸聚酯 薄臈(TORAY(股）製，「Lumirror」Xl〇s 125μΐΏ)，依固形分 塗佈厚6师塗佈2液硬化式接著劑(大日本油墨化學工業(股) 100134724 27 201217163 製，LX-903/KL-75=8/l)，乾燥而製成積層體。 經積層的薄膜依溫度4(TC實施72小時熟成，促進接著劑 層的硬化反應，形成本發明的太陽電池背面保護片。 對該薄膜施行與EVA的熱接著，包括耐熱性在内的綜合 評價結果係如表1所由表可知，本發明白勺薄膜完全符合 當作太％電池背面保護片用的必要要件。 (實施例2) 作為A層所使用的樹脂，係使用相對於炫點112。〇、密产 0.912g/cm3、MFR4g/l〇分的LDPE 100重量份，混合入炫點 150°C、密度0.900g/cm3、MFR7g/10分、乙烯含有量4莫耳 %的EPC 150重量份之樹脂混合物。 作為B層所使用的樹脂，係使用相對於熔點i5〇〇c、密度 0.900g/cm3、MFR7g/10 分、乙烯含有量 4 莫耳％的 EPC(100 重量份），混合入熔點16(TC、密度〇.900g/cm3、MFR4g/l〇 分、乙烯含有量7莫耳％的B-PP(100重量份）、及氧化鈦母 料A 20重量份的樹脂混合物。屬於著色化劑的氧化鈦添加 量係5.5重量％。 作為C層所使用的樹脂，係使用相對於熔點160°C、密度 0.900g/cm3、MFR4g/10 分、乙烯含有量 7 莫耳％的 B-PP 100 重量份，混合入熔點162°C、密度〇.9〇〇g/cm3、MFR7g/10 分的H-PP 100重量份之樹脂混合物。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 100134724 28 201217163 應給各自的單螺桿熔融擠出機，分別依26〇°c溶融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 30 C的、/堯注滚筒上，從非滾筒面側吹出25。〇冷風而冷卻固 化’獲得各層厚度構成比率為A層/B層/c層=1〇%/80%/10% 且薄膜厚度15〇μιη之聚烯烴系樹脂多層薄膜。 對该多層薄膜的C層單面施行電暈放電處理，使表面的 潤濕張力為40mN/m並捲取。將薄膜依與實施例1相同的方 法形成太陽電池背面保護片。該薄膜係如表1所示，完全符 合本發明的必要要件。 (實施例3) 作為A層所使用的樹脂’係使用相對於溶點12 7 〇c、密度 〇.940g/cm3、MFR5g/10分的LLDPE7〇重量份，混合入熔點 112 C、街度 0.912g/cm3、MFR4g/10 分的 LDPE 30 重量份（聚 乙烯合計100重量份）、及當作聚丙烯系樹脂用的熔點 150°C、密度0.900g/cm3、MFR7g/10分且乙烯含有量4莫耳 %的EPC200重量份之樹脂混合物。 作為B層所使用的樹脂，係使用相對於溶點16〇。〇、密产 0.90g/cm、MFR4g/10分、乙稀含有量7莫耳％的B_pp 1〇〇 重里伤，混合入氧化鈦母料A 48重量份的樹脂混合物。屬 於著色化劑的氧化鈥添加量係19.5重量％。 再者，作為C層所使用的樹脂，係使用炼點1、穷产 〇_900g/cm3、MFR7g/10分、乙烯含有量4莫耳％的Epc。又 100134724 29 201217163 將依此所準備的A層、B層、c層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，分別依26(rc熔融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 3〇 C的洗注滚筒上，從非滾筒面側吹出25。〇冷風而冷卻固 化’獲得各層厚度構成比率為A層/B層/c層=2〇%/6〇%/2〇% 且薄膜厚度150μιη之聚烯烴系樹脂多層薄膜。 對該多層薄膜的C層施行電暈放電處理，使表面的潤濕 張力為40mN/m並捲取。將薄膜依與實施例i相同的方法形 成太陽電池背面保護片。該薄膜係如表丨所示，完全符合本 發明的必要要件。 (實施例4) 作為A層所使用的樹脂，係使用相對於炫點127。〇、密度 〇.940g/cm3、MFR5g/10分的LLDPE97重量份，混合入溶點 112°C、密度 0.912g/cm3、MFR4g/10 分的 LDPE3 重量份（聚 乙烯合計100重量份）、及當作聚丙烯系樹脂用的熔點 164°C、密度 0.900g/cm3、MFR3g/10 分之 H-PP50 重量份的 樹脂混合物。 作為B層所使用的樹脂，係使用相對於炫點16〇°C、密度 〇.900g/cm3、MFR7g/10分的H-PP 100重量份，混合入氧化 鈦母料A 100重量份的樹脂混合物。屬於著色化劑的氧化|太 添加量係30.0重量％。 作為C層所使用的樹脂’係使用熔點162°C、密度 100134724 30 201217163 0.900g/cm3、MFR7g/l〇 分的 H-PP。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，分別依260T：熔融後’導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 30°C的澆注滾筒上’從非滾筒面側吹出25°C冷風而冷卻固 化’獲得各層厚度構成比率為A層/B層/C層=1〇%/7〇%/2〇% 且薄膜厚度150μπι之聚烯烴系樹脂多層薄膜。 對該多層薄膜的C層施行電暈放電處理，使表面的潤濕 張力為40mN/m並捲取。將薄膜依與實施例1相同的方法形 成太陽電池背面保護片。該薄臈係如表丨所示，完全符合本 發明的必要要件。 (實施例5) 作為A層所使用的樹脂，係使用相對於熔點127。〇、密度 0.940g/cm3、MFR5g/l〇 分的 LLDpE 1〇〇 重量份，混合入當 作聚丙烯系樹脂用的熔點16〇ΐ、密度〇 9〇〇g/cm3、 MFR4g/lG分、乙稀含有量7莫耳％之B pp2GQ重量份的樹 脂混合物。 作為B層所使用的樹脂， 係使用相對於熔點15〇。〇、密度S 201217163 parts (100 parts by weight of polyethylene), and a melting point of 150 ° C for a polypropylene resin, a density of 0.900 g/cm 3 , an MFR of 7 g/10 minutes, and an ethylene content of 4 moles. /. 100 parts by weight of a resin mixture of ethylene/propylene random copolymer (hereinafter referred to as "EPC"). The resin used as the layer B was used at 16 Å with respect to the melting point. Heteropolypropylene having a density of 0.90 g/cm3 and MFR of 7 g/10 (hereinafter referred to as "h-PP") 1 〇〇 Heavy wounds//See a resin mixture of 30 parts by weight of titanium oxide masterbatch A. The amount of titanium oxide added to the coloring agent was 13.8% by weight. Further, 'the resin used as the C layer' is an ethylene·propylene block copolymer resin having a melting point of i6〇〇c, a density of 0.900 g/cm 3 , an MFR of 4.0 g/l, and an ethylene content of 7 mol% ( Hereinafter referred to as "B_PP"). The resin layers of the ruthenium layer, the ruthenium layer and the C layer thus prepared were supplied to respective single-screw melt extruders, respectively, according to 26 Torr. After melting, the crucible was guided to a multi-manifold type τ-type die of the A layer/B layer/C layer type, extruded to a casting drum maintained at 30 C, and blown 25 from the non-roller surface side. The cold-cured air was cooled and solidified to obtain a polyolefin-based resin multilayer film having a thickness ratio of each layer of a layer of enamel layer/Β layer/c layer = 10%/80%/10% and a film thickness of 150 μm. The C side of the multilayer film was subjected to corona discharge treatment so that the surface had a wetting tension of 40 mN/m and was taken up. The corona-treated surface of the sample film obtained by the present invention and the biaxially stretched polyester enamel ("Rayramor" Xl〇s 125μΐΏ, manufactured by TORAY Co., Ltd.) were coated with a thickness of 6 divisions and coated with 2 liquids. The following agent (Daily Ink Chemical Industry Co., Ltd. 100134724 27 201217163, LX-903/KL-75=8/l) was dried to form a laminate. The laminated film is cured at a temperature of 4 (TC for 72 hours to promote the hardening reaction of the adhesive layer to form the solar cell back protective sheet of the present invention. The film is subjected to heat treatment with EVA followed by comprehensive evaluation including heat resistance. As a result, as shown in the table of Table 1, the film of the present invention completely conforms to the necessity as a protective sheet for the battery of the %%. (Example 2) The resin used as the layer A is used in comparison with the bright spot 112. 100 parts by weight of LDPE with a density of 0.912 g/cm3 and MFR4g/l, mixed into an EPC 150 with a scent of 150 ° C, a density of 0.900 g/cm 3 , an MFR of 7 g/10 minutes, and an ethylene content of 4 mol %. The resin used as the layer B is EPC (100 parts by weight) based on the melting point i5〇〇c, the density of 0.900g/cm3, the MFR7g/10min, and the ethylene content of 4mol%. A resin mixture having a melting point of 16 (TC, a density of 900.900 g/cm3, an MFR of 4 g/l, a B-PP (100 parts by weight) having an ethylene content of 7 mol%, and a titanium oxide master batch A of 20 parts by weight was mixed. The amount of titanium oxide added to the coloring agent was 5.5% by weight. The resin was used in an amount of 100 parts by weight of B-PP with a melting point of 160 ° C, a density of 0.900 g/cm 3 , an MFR of 4 g/10 minutes, and an ethylene content of 7 mol%, and a mixture of 162 ° C and a density of 〇〇.9〇〇. 100 parts by weight of H-PP resin mixture of g/cm3, MFR7g/10 parts. The resin mixture of layer A, layer B and layer C prepared according to the above is supplied to 100134724 28 201217163 for respective single-screw melt extrusion. After the machine is melted at 26 ° C, it is guided to the A-layer/B-layer/C-layer multi-manifold type τ-type die, and extruded to a 30 C/rolling drum. The non-roller surface side is blown out 25. The cold air is cooled and solidified to obtain a polyolefin-based resin multilayer film having a thickness ratio of each layer of layer A/B layer/c layer=1〇%/80%/10% and film thickness of 15 μm. The C layer of the multilayer film was subjected to a corona discharge treatment to have a surface wetting tension of 40 mN/m and wound up. The film was formed into a solar cell back surface protective sheet in the same manner as in Example 1. As shown in Table 1, it is in full compliance with the essential requirements of the present invention. (Example 3) The resin used as the A layer is used relative to the melting point. 12 7 〇c, density 〇.940g/cm3, MFR5g/10 min LLDPE7 〇 parts by weight, mixed into a melting point of 112 C, a street degree of 0.912g/cm3, MFR4g/10 minutes of LDPE 30 parts by weight (polyethylene total 100 weight And a resin mixture which is 200 parts by weight of EPC having a melting point of 150 ° C, a density of 0.900 g/cm 3 , an MFR of 7 g/10 minutes, and an ethylene content of 4 mol %. As the resin used for the layer B, 16 Å was used with respect to the melting point. 〇, densely produced 0.90 g/cm, MFR 4 g/10 minutes, B_pp 1 乙 having an ethylene content of 7 mol%, and mixed with a resin mixture of 48 parts by weight of the titanium oxide master batch A. The amount of cerium oxide added to the coloring agent was 19.5% by weight. Further, as the resin used for the layer C, Epc having a refining point 1, a poor yield of 900900 g/cm3, an MFR of 7 g/10 minutes, and an ethylene content of 4 mol% was used. 100134724 29 201217163 The resin mixtures of the A layer, the B layer and the c layer prepared in this manner are respectively supplied to the respective single screw melt extruders, respectively, which are guided to the A layer/B layer by 26 (rc melting). /C layer type multi-manifold type τ-type die, extruded to a washing drum maintained at 3 ° C, and blown 25 from the non-roller surface side. Cooling and solidifying by cold air to obtain a layer thickness ratio of layer A a polyolefin-based resin multilayer film having a film thickness of 150 μm and a film thickness of 150 μm. The C layer of the multilayer film is subjected to a corona discharge treatment to make the surface wetting tension 40 mN/m and coiled. The film was formed into the solar cell back protective sheet in the same manner as in Example i. The film was as shown in the table, and fully complies with the essentials of the present invention. (Example 4) As the layer A The resin to be used was LDPE3 mixed with a melting point of 112 ° C, a density of 0.912 g/cm 3 , and a MFR 4 g / 10 min, with respect to 97 parts by weight of LLDPE, 〇, density 〇.940 g/cm 3 , MFR 5 g/10 minutes. Parts by weight (100 parts by weight of polyethylene), and a melting point of 164 ° C, density as a polypropylene resin 0.900 g/cm3, MFR3g/10 parts by weight of H-PP 50 parts by weight of the resin mixture. The resin used as the layer B is used at a density of 〇.900g/cm3, MFR7g/10 minutes relative to the bright point of 16 ° C. 100 parts by weight of H-PP, 100 parts by weight of the resin mixture mixed with the titanium oxide masterbatch A. The oxidation amount of the coloring agent is 30.0% by weight. The resin used as the C layer is a melting point of 162 ° C. , density 100134724 30 201217163 0.900g / cm3, MFR7g / l H H-PP. The resin mixture of layer A, layer B, layer C prepared according to this, respectively, is supplied to the respective single-screw melt extruder, According to 260T: after melting, 'guided to the A-layer/B-layer/C-layer type multi-manifold type τ-type die, extruded to a casting drum maintained at 30 ° C. 'Blowing 25° from the non-roller side C cold air and cooling and solidifying' A polyolefin-based resin multilayer film having a thickness ratio of each layer of A layer/B layer/C layer=1〇%/7〇%/2〇% and a film thickness of 150 μm is obtained. The layer was subjected to corona discharge treatment so that the surface wetting tension was 40 mN/m and wound up. The film was formed in the same manner as in Example 1. The solar cell back protective sheet is as shown in the table, and fully meets the requirements of the present invention. (Example 5) The resin used as the layer A is used at a melting point of 127. 〇, density: 0.940 g /cm3, MFR5g/l of LLDpE 1 part by weight, mixed into a polypropylene resin for melting point 16 〇ΐ, density 〇 9〇〇g/cm3, MFR4g/lG, ethylene content 7 Molar% of B pp2GQ parts by weight of resin mixture. As the resin used for the layer B, 15 Å was used with respect to the melting point. 〇, density

作為C層所使用的樹脂， 係使用相對於熔點162。(：、密度 100134724 31 201217163 0.900g/cm3、MFR7g/l〇分的H-PP 100重量份，混合入熔點 150°C、密度〇.9〇〇g/cm3、MFR7g/10分、乙烯含有量4莫耳 %之EPC 1〇〇重量份的樹脂混合物。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，分別依260°C熔融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 30 C的洗注滚筒上，從非滾筒面側吹出25〇C冷風而冷卻固 化，獲得各層厚度構成比率為A層/B層/C層=1〇%/7〇%/2〇〇/。 且薄膜厚度150μιη之聚烯烴系樹脂多層薄膜。將薄膜依與 實施例1相同的方法形成太陽電池背面保護片。該薄膜係如 表1所示，完全符合本發明的必要要件。 (實施例6) 作為Α層所使用的樹脂，係使用相對於熔點、密度 〇.956g/cm3、MFR4g/l〇分的HDPE 100重量份，混合入當作 聚丙烯系樹脂用的熔點164°C、密度0.9〇〇g/em3、MFR3g/1() 分之H-PP 50重量份的樹脂混合物。 作為B層所使用的樹脂’係使用相對於炼點16〇°c、密度 0.900g/cm3、MFR7g/l〇分的H-PP 1〇〇重量份，混合入氧化 欽母料A 25重量份的樹脂混合物。屬於著色化劑的氧化鈦 添加量係12.0重量％。 作為C層所使用的樹脂’係使用炫點、密度 0.900g/cm3、MFR4g/l〇分、乙烯含有量7莫耳％的B_pp。 100134724 32 201217163 將依此所準備的A層、b層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，分別依26〇〇c熔融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 3〇°C的洗注滾筒上’從非滾筒面側吹出25。〇冷風而冷卻固 化’獲得各層厚度構成比率為A層/B層/C層=1 〇%/7〇%/2〇〇/。 且薄膜厚度150μιη之聚烯烴系樹脂多層薄膜。將薄膜依與 實施例1相同的方法形成太陽電池背面保護片。 該薄膜係如表1所示，完全符合本發明的必要要件。但， 因為Α層中調配入熔點高於LDPE與LLDPE的HDPE，因 而經玻璃層壓試驗後，獲得A層與EVA的接著性稍差之結 果。 (實施例7) 將實施例1的薄膜使用26(TC的單軸熔融擠出機進行熔融 後’再經造粒，使用為回收原料。 作為B層所使用的樹脂，係使用相對於熔點15〇ΐ、密度 〇^〇g/Cm3、MFR7g/10分、乙烯含有量4莫耳％的咖^ 重=份，混合入上述回收原料(50重量份)與氧化鈦母料Μ 重分的樹脂混合物。屬於著色化劑的氧化鈦添加量係Μ 重量％。X，相關A層、C層係獲得與實施例i相同配方、 相同組成的聚烯烴請衫層_。將㈣依與實施例工 一同勺方去形成太陽電池为面保護片。該薄膜係如表1所 示’完全符合本發明的必要要件。 100134724 33 201217163 (實施例8) 作為B層所使用的祕脂，係使用相對於炼點1、密度 0.900g/cm、MFR7g/10分、乙稀含有量4莫耳％的Epc 重量份，混合入溶點112C、密度〇.912g/cm3、MFR4g/10 分的LDPE 50重量份與氧化鈦母料a21重量份的樹脂混合 物。屬於著色化劑的氧化鈦添加量係7.4重量％。又，相關 A層、C層係獲得與實施例丨相同配方、相同組成的聚婦烴 系樹脂多層薄膜。將薄膜依與實施例丨相同的方法形成太陽 電池背面保護片。 該薄膜係如表1所示，完全符合本發明的必要要件。但， B層的聚丙稀系樹脂中’聚乙稀含有量係32重量％，呈耐 熱性稍差的結果。 (實施例9) 作為A層所使用的樹脂，係使用相對於炫點1 η。。、密度 0.940g/cm3、MFR5g/10 分的 LLDPE 1〇〇 重量份，混合入當 作聚丙烯系樹脂用的熔點15〇t、密度〇 9〇〇g/cm3、 MFR7g/1〇分且乙稀含有量4莫耳％之Epc 35〇重量份的樹 脂混合物。又’相關B層與C層係獲得與實施例】相同配 方、相同組成的聚烯烴系樹脂多層薄膜。將薄膜依與實施例 1相同的方法形成太陽電池背面保護片。該薄膜係如表^斤 示，完全符合本發明的必要要件。 (實施例10) 100134724 tt« 34 201217163 作為A層所使用的樹脂，係使用相對於嫁點l2rc、密度 0.940g/cm3、MFR5g/10 分的 LLDPE 1〇〇 重量份，混人入當 作聚丙烯系樹脂用的熔點160°C、密度〇 9〇〇g/cm3、 MFR4g/10分、乙烯含有量7莫耳％之B_PP5〇〇重量份的樹 脂混合物。又’相關B層與C層係獲得與實施例1相同配 方、相同組成的聚烯烴系樹脂多層薄膜。將薄膜依與實施例 1相同的方法形成太陽電池背面保護片。該薄膜係如表i所 示，完全符合本發明的必要要件。 (實施例11) 作為A層所使用的樹脂，係使用相對於熔點15(rc、密度 0.900g/em3、MFR7g/lG分且乙烯含有量4莫耳％的Epci〇〇 重量份，混合人苯并三唾系紫外線吸收劑母料A !⑻重量份 的樹脂混合物。苯并三，紫外線吸收劑的添加量係5 〇重 量％。 作為B層所使用的樹脂，係使用相對於溶點⑽。c、密度 0-9〇g/cm3、MFR7g/10分的H_pp35重量份，混合入氧化鈦 母料A 3 0重量份與科三唾系料線吸收劑母料b 6 $重量 份的樹脂混合物。屬於著色化劑的氧化鈦添加量係Μ重 量％，苯并三衫紫外線吸收劑的添加量係5 ()重量％。 再者作為C層所使用的樹脂，係使用炼點⑽。c、密度 〇.9〇〇g/Cm3、膽4_分、乙稀含有量7莫耳％的B-PP。 將依此所準備的A層、B層、c層之樹脂混合物，分別供 100134724 35 201217163 應給各自的單螺桿騎擠出機，與#施例1同樣的獲得各層 厚度構成比率為A層/B層/(：層=1〇%/8〇%/1〇%且薄膜厚度 150μηι的聚烯烴系樹脂多層薄膜。 對4夕層溥膜的c層單面施行電暈放電處理，使表面的 潤濕張力為40mN/m並捲取。將薄膜依與實施例}相同的方 法形成太陽電池背面保護片。 對該薄膜施行與EVA的熱接著，包括耐熱性在内的綜合 評價結果係如表丨所示。由表可知，本發明的薄膜完全符合 當作太陽電池背面保護片用的必要要件。 (實施例12) 作為A層所使用的樹脂’係使用相對於熔點127。匸、密度 0.940g/Cm3、MFR5g/10分的LLDPE7〇重量份，混合入熔點 112 C、岔度 〇.912g/cm3、MFR4g/l〇 分的 LDP£ 20 重量份、 與當作聚丙烯系樹脂用的熔點150¾、密度0 9〇〇g/cm3、 MFR7g/10分且乙烯含有量4莫耳％的EPC 1〇〇重量份、以 及奈米軋化鋅母料A 10重1份的樹脂混合物。奈米氧化鋅 的添加量係0.5重量％。 作為B層所使用的樹脂’係使用相對於炫點16〇。〇 '密度 0.90g/cm3、MFR7g/10分的H-PP2.5重量份，混合入氧化鈦 母料A 30重量份、受阻胺系紫外線吸收劑母料B 65重量 份、及苯并三唑系紫外線吸收劑母料B 32 5重量份的樹脂 合物。屬於者色化劑的氧化欽添加量係1 3 8重量％，苯The resin used as the layer C is used in relation to the melting point 162. (:, density 100134724 31 201217163 0.900g/cm3, MFR7g/l of H-PP 100 parts by weight, mixed into the melting point of 150 ° C, density 〇.9〇〇g/cm3, MFR7g/10 minutes, ethylene content 4 mol% of EPC 1 part by weight of the resin mixture. The resin mixtures of layer A, layer B, and layer C prepared in this manner are respectively supplied to respective single-screw melt extruders at 260 ° C, respectively. After melting, it is guided to a multi-manifold type τ-type die of the A layer/B layer/C layer type, extruded to a washing drum maintained at 30 C, and cooled by 25 〇C cold air from the non-roller surface side. The film was cured to obtain a polyolefin-based resin multilayer film having a thickness ratio of each layer of A layer/B layer/C layer=1〇%/7〇%/2〇〇/ and a film thickness of 150 μm. The film was the same as in Example 1. The method of forming a solar cell back protective sheet, which is shown in Table 1, is in full compliance with the essential requirements of the present invention. (Example 6) The resin used as the ruthenium layer was used at a density of 956.956 g / relative to the melting point. 100 parts by weight of HDPE of cm3 and MFR4g/l, mixed into a melting point of 164 ° C for polypropylene resin, density of 0.9 〇〇 g / em 3 , M FR3g/1() is 50 parts by weight of the resin mixture of H-PP. The resin used as the layer B is H-based at 16 ° C, density 0.900 g/cm 3 , MFR 7 g/l 相对. PP 1 part by weight, mixed with 25 parts by weight of the resin mixture of the oxidized masterbatch A. The amount of titanium oxide added to the coloring agent was 12.0% by weight. The resin used as the C layer was used as a scent, density 0.900. g/cm3, MFR4g/l, and B_pp having an ethylene content of 7 mol%. 100134724 32 201217163 The resin mixtures of layer A, layer b, and layer C prepared in this manner are respectively supplied to respective single-screw melt extrusions. After the machine is melted according to 26〇〇c, it is guided to the multi-manifold type τ-type die of the A layer/B layer/C layer type, and extruded to the washing roller which is kept at 3 ° C. The non-roller side is blown out 25. The cold air is cooled and solidified to obtain a polyolefin resin having a thickness ratio of each layer of layer A/B layer/C layer=1%%/7〇%/2〇〇/ and a film thickness of 150 μm. A multilayer film was formed in the same manner as in Example 1 to form a solar cell back protective sheet. The film was as shown in Table 1, and was completely in accordance with the present invention. The necessary requirements are clear. However, since the ruthenium layer is blended with HDPE having a higher melting point than LDPE and LLDPE, the result of the adhesion of layer A and EVA is slightly worse after the glass lamination test. (Example 7) The film of Example 1 was granulated using 26 (melted by a TC uniaxial melt extruder), and used as a raw material for recycling. The resin used for the layer B is mixed with the above-mentioned recycled raw material by using a resin having a density of 15 Å, a density of 〇g/cm3, an MFR of 7 g/10 minutes, and an ethylene content of 4 mol%. 50 parts by weight of a resin mixture which was separated from the titanium oxide masterbatch. The amount of titanium oxide added to the coloring agent is Μ by weight. X, the relevant A layer, C layer is obtained with the same formula and the same composition of the polyolefin composition layer _. (4) According to the work of the example, the solar cell is used as a protective sheet. The film is as shown in Table 1 'completely in accordance with the requirements of the present invention. 100134724 33 201217163 (Example 8) The secret fat used as the layer B was mixed with Epc parts by weight of 0.90 g/cm, MFR 7 g/10 minutes, and ethylene content of 4 mol%. 50 parts by weight of LDPE having a melting point of 112C, a density of 912 912 g/cm 3 , and an MFR of 4 g/10 minutes and a resin mixture of 21 parts by weight of the titanium oxide masterbatch a. The amount of titanium oxide added to the coloring agent was 7.4% by weight. Further, in the related layers A and C, a polysulfide-based resin multilayer film having the same composition and composition as that of the example was obtained. The solar cell back protective sheet was formed in the same manner as in Example 将. The film is shown in Table 1 and is in full compliance with the essentials of the present invention. However, in the polypropylene resin of the B layer, the content of the polyethylene was 32% by weight, which was a result of a slight heat resistance. (Example 9) As the resin used for the layer A, the η 1 η was used. . LLDPE density of 0.940g/cm3 and MFR5g/10 minutes, mixed into a melting point of 15〇t, density 〇9〇〇g/cm3, MFR7g/1〇 and B A mixture of 4 parts by mole of Epc 35 parts by weight of the resin mixture. Further, the related B layer and the C layer obtained a polyolefin-based resin multilayer film having the same composition and the same composition as in the examples. The solar cell back protective sheet was formed in the same manner as in Example 1 except for the film. The film is shown in the table and is in full compliance with the essentials of the present invention. (Example 10) 100134724 tt« 34 201217163 As the resin used for the layer A, a weight fraction of LLDPE of 1 part, a density of 0.940 g/cm3, and an MFR of 5 g/10 minutes was used as a resin. A resin mixture for a propylene resin having a melting point of 160 ° C, a density of 9 〇〇 g/cm 3 , an MFR of 4 g/10 minutes, and an ethylene content of 7 mol % of B_PP 5 〇〇 parts by weight. Further, the related B layer and the C layer were obtained as a polyolefin resin multilayer film having the same composition and composition as in Example 1. The solar cell back protective sheet was formed in the same manner as in Example 1 except for the film. The film is shown in Table i and is in full compliance with the essentials of the present invention. (Example 11) As the resin used for the layer A, a mixture of human benzene was used in an amount of Epci〇〇 with a melting point of 15 (rc, a density of 0.900 g/em3, an MFR of 7 g/lG, and an ethylene content of 4 mol%). Further, the tris-based ultraviolet absorber master batch A A (8) parts by weight of the resin mixture. The benzotriazole and the ultraviolet absorber were added in an amount of 5 〇 by weight. The resin used as the layer B was used in relation to the melting point (10). c, density 0-9 〇g / cm3, MFR7g/10 minutes H_pp35 parts by weight, mixed into the titanium oxide masterbatch A 30 parts by weight and the tri-salt line absorbent masterbatch b 6 parts by weight of the resin mixture The amount of titanium oxide added to the coloring agent is Μ% by weight, and the amount of the benzotrimine ultraviolet absorber added is 5 (% by weight). Further, as the resin used for the layer C, a refining point (10) is used. B-PP having a density of 〇〇9〇〇g/cm3, a biliary 4_minute, and an ethylene content of 7 mol%. The resin mixture of the A layer, the B layer, and the c layer prepared in this manner is respectively supplied to 100134724 35 201217163 should be given to the respective single-screw riding extruder, the same as # #1, the thickness ratio of each layer is obtained as A layer / B layer / (: layer = 1 A polyolefin-based resin multilayer film having a film thickness of 150 μm and a film thickness of 150 μm. The corona discharge treatment was performed on the c-layer single side of the 4 夕 layer 溥 film, and the surface wetting tension was 40 mN/m. The solar cell back surface protective sheet was formed in the same manner as in Example 1. The film was subjected to heat treatment with EVA, and the results of comprehensive evaluation including heat resistance were as shown in the table. The film of the invention is fully compatible with the protective sheet for the back surface of the solar cell. (Example 12) The resin used as the layer A was used in a ratio of 127, 密度, density of 0.940 g/cm 3 and MFR 5 g/10 minutes. LLDPE 7 parts by weight, mixed into a melting point of 112 C, a temperature of 912 912 g / cm 3 , MFR 4 g / l 的 LDP £ 20 parts by weight, and a melting point of 1503⁄4 for polypropylene resin, density 0 9 〇〇 g / A resin mixture of cm 3 , MFR 7 g/10 minutes and EPC 1 part by weight of ethylene content of 4 mol %, and 1 part by weight of zinc nitride masterbatch A 10. The amount of nano zinc oxide added is 0.5% by weight. The resin used as the B layer is used at a density of 16 相对. 2.5 parts by weight of H-PP of 0.90 g/cm3 and MFR 7 g/10 minutes, 30 parts by weight of titanium oxide masterbatch A, 65 parts by weight of hindered amine-based ultraviolet absorber masterbatch B, and ultraviolet absorption of benzotriazole-based Masterbatch B 32 5 parts by weight of resin compound. The amount of oxidizing agent belonging to the coloring agent is 138% by weight, benzene

100134724 36 S 201217163 并二β坐糸备、外線吸收劑的添加量係5 〇重量％，受阻胺系光 安定劑的添加量係2.5重量％。 再者，作為c層所使用的樹脂，係使用熔點16(rc、密度 0.900g/cm3、MFR4g/10 分的 B-PP。 將依此所準備的A層、B層、c層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機’與實施例丨同樣的獲得各層 厚度構成比率為A層/B層/c層=1〇%/8〇%/1〇%且薄膜厚度 150μηι的聚烯烴系樹脂多層薄膜。 對該多層薄膜的C層單面施行電暈放電處理，使表面的 潤濕張力為40mN/m並捲取。將薄膜依與實施例丄相同的方 法形成太陽電池背面保護片。 對該薄膜施行與EVA的熱接著，包括耐熱性在内的綜合 §平價結果係如表1所示。由表可知，本發明的薄膜完全符人 當作太陽電池背面保護片用的必要要件。 (實施例13) 作為A層所使用的樹脂’係使用相對於溶點i27°c、密度 0.940g/cm3、MFR5g/10分的LLDPE20重量份，混合入、熔點 112°C、密度 〇.912g/cm3、MFR4g/10 分的 LDPE 20 重量份、 受阻胺系紫外線吸收劑母料A 10重量份、奈米氧化辞母料 A50重量份、以及當作聚丙烯系樹脂用的熔點i5〇〇c、密度 0.900g/cm3、MFR7g/10分且乙烯含有量4莫耳％之EPC 1〇〇 重量份的樹脂混合物。受阻胺系光安定劑的添加量係〇 5重 100134724 37 201217163 i /〇，奈米氧化鋅的添加量係2 $重量％。 作為B層所使用的樹脂，係使用相對於溶點 MOt：、密戽 0.90〆、峨柳分的H_PP61重量份經混合: 鈦母料A30重量份、受阻胺系光安定劑母料B65重量伶 及奈米氧化鋅母料B 32.5重量份的樹脂混合物。屬々、 化劑的氧化鈦添加量係13.8重量％，受阻胺系 添加量係〇.5重量％，奈米氧化鋅的添加量係2.5重量。/:。 再者作為c層所使用的樹脂，係使用溶點⑽。c ㈣OgW、MFR4g/1G分、乙稀含有量7莫耳％的叫/ 將依此所準備的A層、C層之樹脂混合物，分別供 應給各自的單螺桿溶融擠出機，與實施例ι同樣的獲得各層 厚度構成比率為A層/B層/C層=1〇%/8()%/1〇%且薄膜厚户 150μιη的聚烯烴系樹脂多層薄膜。 又 對歧夕層溥膜的c層單面施行電暈放電處理，使表面的 潤濕張力為40mN/m並捲取。將薄膜依與實施例i相同的方 法形成太陽電池背面保護片。 對該薄膜施行與EVA的熱接著，包括耐熱性在内的綜合 評價結果係如表丨所示。由表可知，本發明的薄膜完全符合 當作太陽電池背面保護片 用的必要要件。 (實施例14) 作為A層所使用的樹脂，係使用相對於溶點127°C、密度 〇.940g/Cm3、MFR5g/1〇分的LLDpE 7〇重量份，混合入熔點 100134724100134724 36 S 201217163 The addition amount of the external absorber and the external absorbent is 5% by weight, and the amount of the hindered amine light stabilizer is 2.5% by weight. Further, as the resin used for the c layer, a B-PP having a melting point of 16 (rc, a density of 0.900 g/cm3, and an MFR of 4 g/10 minutes) is used. A resin mixture of the A layer, the B layer, and the c layer prepared as described above. , respectively, supplied to the respective single-screw melt extruders, and the same thickness ratio of each layer was obtained as A layer/B layer/c layer=1〇%/8〇%/1%% and film thickness 150 μηι in the same manner as in Example 丨. A polyolefin-based resin multilayer film was subjected to a corona discharge treatment on one side of the C-layer of the multilayer film, and the surface wetting tension was 40 mN/m, and the film was wound up. The film was formed into the back surface of the solar cell in the same manner as in Example 丄. Protective sheet. The film was subjected to heat treatment with EVA, and the comprehensive § parity results including heat resistance were as shown in Table 1. From the table, the film of the present invention was completely used as a solar cell back protective sheet. (Example 13) As the resin used in the A layer, 20 parts by weight of LLDPE with a melting point of i27 ° C, a density of 0.940 g/cm 3 , and an MFR of 5 g/10 min were used, and the mixture was mixed at a melting point of 112 ° C and a density. 912.912g/cm3, MFR4g/10 min LDPE 20 parts by weight, hindered amine UV 10 parts by weight of the masterbatch A, 50 parts by weight of the nano-oxidized masterbatch, and the melting point i5〇〇c for the polypropylene resin, the density of 0.900 g/cm3, the MFR of 7 g/10 minutes, and the ethylene content of 4 1% by weight of the EPC 1 part by weight of the resin mixture. The amount of the hindered amine light stabilizer is 〇5 weight 100134724 37 201217163 i /〇, the amount of nano zinc oxide added is 2 $% by weight. The resin to be used is mixed with 61 parts by weight of H_PP with respect to the melting point MOt:, the density of 0.90 〆, and the 峨 分: 2 parts by weight of the titanium masterbatch A, the weight of the hindered amine-based light stabilizer masterbatch B65, and the oxidation of the nanometer. 32.5 parts by weight of the resin mixture of the zinc master batch B. The amount of the titanium oxide added to the bismuth compound was 13.8% by weight, the amount of the hindered amine added was 5% by weight, and the amount of the added zinc oxide was 2.5 weight. Further, as the resin used in the c layer, a melting point (10) is used. c (iv) OgW, MFR4g/1G, and ethylene content of 7 mol% are called / A layer and C layer resin to be prepared accordingly The mixture was supplied to respective single-screw melt extruders, and the layers were obtained in the same manner as in Example ι. The polyolefin-based resin multilayer film having a thickness composition ratio of A layer/B layer/C layer=1〇%/8()%/1〇% and a film thickness of 150 μm is also a c-layer single side of the 歧 溥 layer 溥 film. A corona discharge treatment was performed to make the surface wetting tension 40 mN/m and wound up. The film was formed into the solar cell back surface protective sheet in the same manner as in Example i. The film was subjected to heat treatment with EVA, including heat resistance. The results of the comprehensive evaluation are shown in the table. As can be seen from the table, the film of the present invention is fully compatible with the requirements for use as a back sheet for solar cells. (Example 14) As the resin used for the layer A, an LLDpE 7 〇 part by weight of 127 ° C, a density of 940 940 g/cm 3 , and an MFR of 5 g / 1 〇 was used, and the mixture was mixed in a melting point of 100,134,724.

38 S 201217163 112°C、密度 0.912g/cm3、MFR4g/10 分的 LDPE20 重量份、 受阻胺系光安定劑母料A 10重量份、及當作聚丙烯系樹脂 用的炼點150°C、密度0_900g/cm3、MFR7g/10分且乙埽含 有里4莫耳％之EPC 100重量份的樹脂混合物。受阻胺系光 女疋劑的添加量係〇. 5重量％。 作為B層所使用的樹脂，係使用相對於熔點16〇〇c、密声 0.90g/cm3、MFR7g/10分的H_PP 93 5重量份，混合入氣: 鈦母料A 30重量份與受阻胺系光安定劑母料B 6 5重量份 的樹脂混合物。屬於著色化劑的氧化鈦添加量係13 8重量 % ’受阻胺系光安定劑的添加量係〇 5重量％。 再者，作為c層所使用的樹脂，係使用熔點16(rc、密度 0.900g/cm3、MFR4g/10分、乙烯含有量7莫耳％的B_pp。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，與實施例丨同樣的獲得各層 厚度構成比率為A層/B層/C層=100/0/80%/^%且薄膜厚户 150μιη的聚烯烴系樹脂多層薄膜。 對该多層薄膜的C層單面施行電暈放電處理，使表面的 潤濕張力為40mN/m並捲取。將薄膜依與實施例i相同的方 法形成太陽電池背面保護片。 對該薄膜施行與腸的熱接著，包括耐熱性在内的综合 評價結果係如表1所示。由表可知，本發明的薄膜完全符合 當作太陽電池背面保護片用的必要要件。 100134724 39 201217163 (實施例15) 作為A層所使用的樹脂，係使用相對於溶點127°c、密度 0.940g/cm3、MFR5g/10分的LLDPE 60重量份，混合入、熔點 112°C、密度 〇.912g/cm3、MFR4g/10 分的 LDPE2〇 重量份、 受阻胺系母料A 10重量份、苯并三唑系紫外線吸收劑母料 A 10重置份、及當作聚丙稀糸樹脂用的炫點1、密度 0.900g/cm3、MFR7g/10分且乙烯含有量4莫耳％之Epc 1〇〇 重量份的樹脂混合物。受阻胺系光安定劑的添加量係〇 5重 量％，苯并三唑系紫外線吸收劑的添加量係〇 5重量％。 作為B層所使用的樹脂，係使用相對於溶點！ 6〇乞、密度 0.90g/Cm3、MFR7g/10分的H-PP87重量份，混合入氧化鈦 母料A 30重量份、受阻胺系光安定劑母料B 6 5重量份、 及苯并三唑系紫外線吸收劑母料B 65重量份的樹脂混合 物。屬於著色化劑的氧化鈦添加量係138重量％，受阻胺 系光安定劑的添加量係0.5重量％，苯并三唑系紫外線吸收 劑的添加量係0,5重量％。 再者，作為c層所使用的樹脂，係使用熔點16(rc、密度 0.900g/cm3、MFR4g/l〇分、乙烯含有量7莫耳％的B pp。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，與實施例丨同樣的獲得各層 厚度構成比率為A層/B層/C層=1〇%/8〇%/1〇%且薄膜厚度 15〇μηι的聚烯烴系樹脂多層薄膜。 又 100134724 40 F. 201217163 對邊夕層4膜的c層單面施行電暈放電處理，使表面的 潤濕張力為40mN/m並捲取。將薄膜依與實施例1相同的方 法形成太陽電池背面保護片。 對該薄膜施行與EVA的熱接著，包括耐熱性在内的综合 評價結果係如表1所示。由表可知，本發明的薄膜完全符合 當作太陽電池背面保護片用的必要要件。 (比較例1) 作為A層與C層所使用的樹脂，係使用相對於熔點 127C、密度 0.940g/cm3、MFR5g/l〇 分的 LLDPE 100 重量 份，混合入熔點 15〇。(：、密度 〇.9〇〇g/cm3、MFR7g/10 分、 乙烯含有量4莫耳％之EPC 20重量份的樹脂混合物。 作為B層所使用的樹脂，係使用相對於熔點u6〇c、密度 0.912g/cm3、MFR4g/l〇分的LDPE 100重量份，混合入氧化 鈦母料B 30重量份的樹脂混合物。屬於著色化劑的氧化鈦 添加量係13.8重量％。將依此所準備的樹脂，分別供應給 各自的單螺桿熔融擠出機，分別依26〇°C炫融擠出後，擠出 至保持為30°C的澆注滾筒上’從非滾筒面側吹出25°C冷風 而冷卻固化，獲得各層厚度構成比率為A層/B層/C層 =10%/80%/10°/〇且薄膜厚度ΐ5〇μιη的聚烯烴系樹脂多層薄 膜。 對該多層薄膜其中一者的Α層施行電暈放電處理，使表 面的潤濕張力為40mN/m並捲取。 100134724 41 201217163 將本發明所獲得樣品薄膜的電暈處理面、與雙軸延伸聚酯 薄膜(TORAY公司製「Lumirror」Xl〇s 125μηι)，依固形分 塗佈厚6μηι塗佈2液硬化式接著劑(大曰本油墨化學工業（股) 製LX-903/KL-75=8/l) ’乾燥而製成積層體。 經積層的薄膜依溫度4(TC實施72小時熟成，促進接著劑 層的硬化反應及接著劑層内的發泡，形成本發明的太陽電池 者面保濩片。該薄膜係由A層的聚丙烯系樹脂含有量少、 且相當於C層的部分亦是由以聚乙烯為主體的樹脂所構 成，且B層係LDPE ’因而耐熱性差，厚度變化達以上， 銅板的透出可發現有2片以上。各比較例的結果如表2所示。 (比較例2) A層係與比較例1相同配方。B層所使用的樹脂係使用相 對於熔點 160°C、密度 0.900g/cm3、MFR7g/10 分的 H-PP 1〇〇 重量份，混合入氧化鈦母料A 30重量份）的樹脂混合物。 屬於著色化劑的氧化鈦添加量係13.8重量％。 作為C層樹脂所使用的樹脂’係使用相對於溶點127。匸、 密度 〇.940g/cm3、MFR5g/l〇 分的 LLDPE 100 重量份’混合 入熔點150。(：、密度0.900g/cm3、MFR7g/10分、乙烯含有 量4莫耳％之EPC 50重量份的樹脂混合物。將依此所準備 的樹脂，分別供應給各自的單螺桿熔融擠出機，分別依 26〇°C熔融擠出後，利用多歧管型τ型模頭，獲得a層/b層 /C層=1 〇%/7〇%/2〇%且薄膜厚度15Ομιη的聚稀烴系樹脂多38 S 201217163 112 ° C, density 0.912 g / cm 3 , MFR 4 g / 10 parts by weight of LDPE 20 parts by weight, hindered amine light stabilizer masterbatch A 10 parts by weight, and 150 ° C for polypropylene resin A resin mixture having a density of 0-900 g/cm3, an MFR of 7 g/10 minutes, and an acetonitrile containing 4 mol% of EPC in an amount of 100 parts by weight. The amount of the hindered amine-based galangal is 〇. 5 wt%. As the resin used for the layer B, 5 parts by weight of H_PP 93 with respect to a melting point of 16 〇〇c, a density of 0.90 g/cm 3 , and an MFR of 7 g/10 minutes were used, and the mixture was mixed with gas: 30 parts by weight of the titanium master batch A and a hindered amine. A light stabilizer masterbatch B 6 5 parts by weight of a resin mixture. The amount of titanium oxide added to the coloring agent was 138 wt%, and the amount of the hindered amine light stabilizer was 5% by weight. Further, as the resin used for the c layer, B_pp having a melting point of 16 (rc, a density of 0.900 g/cm3, an MFR of 4 g/10 min, and an ethylene content of 7 mol%) was used. The A layer and the B layer prepared in accordance therewith were used. The resin mixture of the C layer was supplied to the respective single-screw melt extruders, and the thickness ratio of each layer was obtained in the same manner as in Example A, A layer/B layer/C layer=100/0/80%/^% and A polyolefin-based resin multilayer film having a film thickness of 150 μm. The C-layer of the multilayer film was subjected to a corona discharge treatment to have a surface wetting tension of 40 mN/m and wound up. The film was the same as in Example i. The method of forming a solar cell back protective sheet. The film was subjected to heat treatment with the intestine, and the results of comprehensive evaluation including heat resistance were as shown in Table 1. From the table, the film of the present invention was completely conformed to the back side protection of the solar cell. 100134724 39 201217163 (Example 15) As the resin used for the layer A, 60 parts by weight of LLDPE with a melting point of 127 ° C, a density of 0.940 g/cm 3 , and an MFR of 5 g/10 minutes were used. LDP with a melting point of 112 ° C, a density of 912 912 g/cm 3 , and an MFR of 4 g/10 E2 〇 parts by weight, hindered amine masterbatch A 10 parts by weight, benzotriazole-based ultraviolet absorber masterbatch A 10 reset portion, and sleek point 1 used as a polypropylene resin, density 0.900 g/cm 3 , MFR 7 g/10 parts and ethylene resin content 4 mol% of Epc 1 part by weight of the resin mixture. The hindered amine light stabilizer is added in an amount of 5% by weight, and the benzotriazole-based ultraviolet absorber is added in an amount of 5% by weight. 〇5 wt%. As the resin used for the layer B, the weight of the titanium oxide masterbatch A 30 is used in an amount of 87 parts by weight to the melting point of 6 〇乞, density of 0.90 g/cm 3 and MFR of 7 g/10 minutes. a resin mixture of a part, a hindered amine-based stabilizer, B 6 5 parts by weight, and a benzotriazole-based ultraviolet absorber masterbatch, 65 parts by weight. The amount of titanium oxide added to the coloring agent is 138% by weight, which is hindered. The amount of the amine light stabilizer to be added is 0.5% by weight, and the amount of the benzotriazole-based ultraviolet absorber is 0% by weight to 5% by weight. Further, the resin used as the c layer is a melting point of 16 (rc, density). 0.900g/cm3, MFR4g/l, and B pp with an ethylene content of 7 mol%. The resin mixtures of the B layer and the C layer were respectively supplied to the respective single-screw melt extruders, and the thickness ratio of each layer was obtained in the same manner as in Example A, A layer/B layer/C layer=1〇%/8〇%. Polyolefin-based resin multilayer film having a film thickness of 15 〇μηι. Further 100134724 40 F. 201217163 Corona discharge treatment was applied to the c-layer single side of the side layer 4 film to make the surface wetting tension 40 mN/ m and take it up. The film was subjected to the same method as in Example 1 to form a solar cell back surface protective sheet. The film was subjected to heat treatment with EVA, and the results of comprehensive evaluation including heat resistance were as shown in Table 1. As can be seen from the table, the film of the present invention fully meets the requirements for use as a protective sheet for the back surface of a solar cell. (Comparative Example 1) As the resin used for the A layer and the C layer, 100 parts by weight of LLDPE with a melting point of 127 C, a density of 0.940 g/cm3, and an MFR of 5 g/l were used, and the melting point was 15 Torr. (:, a density of 〇〇.9〇〇g/cm3, MFR7g/10 minutes, an ethylene content of 4% by mole of EPC 20 parts by weight of the resin mixture. The resin used as the layer B is used in relation to the melting point u6〇c 100 parts by weight of LDPE having a density of 0.912 g/cm3 and MFR4g/l, and a resin mixture of 30 parts by weight of the titanium oxide masterbatch B. The amount of titanium oxide added to the coloring agent is 13.8% by weight. The prepared resins were separately supplied to the respective single-screw melt extruders, respectively, extruded at 26 ° C, and extruded onto a casting drum maintained at 30 ° C. '25 ° C was blown from the non-roller side. Cooling and solidifying by cold air, and obtaining a polyolefin-based resin multilayer film having a thickness ratio of each layer of A layer/B layer/C layer=10%/80%/10°/〇 and a film thickness of 〇5〇μηη. The enamel layer was subjected to corona discharge treatment to make the surface wetting tension 40 mN/m and wound up. 100134724 41 201217163 The corona-treated surface of the sample film obtained by the present invention and the biaxially stretched polyester film (TORAY Corporation) "Lumirror" Xl〇s 125μηι), coated with a thickness of 6μηι according to the solid form 2 Liquid-curing adhesive (LX-903/KL-75=8/l, manufactured by Otsuka Ink Chemical Industry Co., Ltd.) 'Dry and make a laminate. The laminated film is aged at a temperature of 4 (TC is performed for 72 hours). The curing reaction of the adhesive layer and the foaming in the adhesive layer are promoted to form the solar cell surface protective sheet of the present invention. The film is composed of a polypropylene resin having a small amount of A layer and a portion corresponding to the C layer. It is also composed of a resin mainly composed of polyethylene, and the B layer is LDPE', and thus the heat resistance is poor, and the thickness variation is more than two, and two or more sheets of the copper plate are observed. The results of the respective comparative examples are shown in Table 2. (Comparative Example 2) The A layer was the same as that of Comparative Example 1. The resin used in the B layer was H-PP 1 〇〇 by weight with respect to a melting point of 160 ° C, a density of 0.900 g/cm 3 , and an MFR of 7 g/10 min. A resin mixture of 30 parts by weight of the titanium oxide masterbatch A was added. The amount of titanium oxide added to the coloring agent was 13.8% by weight. The resin used as the C layer resin was used with respect to the melting point 127. 匸, density 〇 .940g/cm3, MFR5g/l of LLDPE 100 parts by weight 'mixed into the melting point 150. (: a resin mixture having a density of 0.900 g/cm3, an MFR of 7 g/10 minutes, and an ethylene content of 4 mol% of EPC 50 parts by weight. The resins prepared in this manner are respectively supplied to respective single-screw melt extruders, respectively After melt-extruding at 26 ° C, a multi-manifold type τ-type die was used to obtain a poly-hydrocarbon resin having a layer/b layer/C layer=1 〇%/7〇%/2〇% and a film thickness of 15 Ομηη. many

100134724 201217163 層薄膜。將薄膜依與實施例1相同的方法形成太陽電池背面 保護片。 該薄膜在耐熱性試驗中雖沒有發生銅板透出等情形，且在 接著性時與EVA間的接著性優異，但在聚丙烯主體的B層、 與聚丙烯系樹脂為20重量份之偏少量且聚乙烯主體的A層 界面處容易發生剝離。 (比較例3) 作為A層所使用的樹脂，係使用熔點i5〇〇c、密度100134724 201217163 Layer film. The solar cell back surface protective sheet was formed in the same manner as in Example 1 except for the film. In the heat resistance test, the film did not have a copper plate or the like, and was excellent in adhesion to EVA at the time of adhesion, but a small amount of 20 parts by weight of the B layer of the polypropylene main body and the polypropylene resin. Moreover, peeling is likely to occur at the interface of the A layer of the polyethylene main body. (Comparative Example 3) As the resin used for the layer A, the melting point i5〇〇c, density was used.

0.900g/cm3、MFR5g/l〇分、乙烯含有量4莫耳％的EPC。B 層所使用的樹脂係與比較例2的B層為相同配方。又，c 層係使用熔點160°C、密度0,900g/cm3、MFR7g/10分的 H-PP。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機’分別依260¾嫁融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 3〇°C的繞注滾筒上’從非滚筒面侧吹出25〇c冷風而冷卻固 化’獲得各層厚度構成比率為A層/B層/C層=1〇%/80%/10% 且薄膜厚度150μιη之聚烯烴系樹脂多層薄膜。將該薄膜依 照與實施例1相同的方法形成太陽電池背面用保護片。該薄 膜因為Α層中並沒有添加聚乙烯，因而與EVA間並沒有發 現充分的密接力。 (比較例4) 100134724 43 201217163 作為A層與c層所使用的樹脂，係使用相對於熔點 127°C、密度 0.940g/cm3、MFR5g/10 分的 LLDPE 100 重量 份，混合入熔點150¾、密度〇.900g/cm3、MFR7g/10分、 乙烯含有量4莫耳％之即〇 550重量份的樹脂混合物。作為 B層所使用的樹脂，係與比較例2的B層為相同配方。 將依此所準備的A層、B層、C層之樹脂混合物，分別供 應給各自的單螺桿熔融擠出機，分別依260。(：熔融後，導引 至A層/B層/C層型的多歧管型τ型模頭，擠出至保持為 3〇°C的澆注滾筒上，從非滾筒面側吹出25°C冷風而冷卻固 化’獲得各層厚度構成比率為A層/B層/C層=10%/80%/10〇/〇 且薄膜厚度150μιη之聚烯烴系樹脂多層薄膜。將該薄膜與 實施例1相同的方法形成太陽電池背面保護片。 該薄膜在與EVA的接著性試驗中，因為Α層的聚丙烯系 樹脂添加量為550重量份的偏多量，故A層與EVA的界面 發生剝離，無法獲得充分的接著強度。 (比較例5) 作為A層所使用的樹脂，係使用相對於熔點127°C、密度 〇.940g/cm3、MFR5g/10 分的 LLDPE 100 重量份，混合入溶 點150°C、密度0.900g/cm3、MFR7g/10分、乙烯含有量4 莫耳％之EPC 100重量份的樹脂混合物。 作為B層的樹脂組成，係使用相對於熔點160°C、密度 〇.900g/cm3、MFR7g/l0分的H-PP 100重量份，混合入氧化 100134724 44 〇0.900 g/cm3, MFR 5 g/l, and EPC having an ethylene content of 4 mol%. The resin used in the layer B was the same as the layer B in the comparative example 2. Further, as the c layer, H-PP having a melting point of 160 ° C, a density of 0,900 g/cm 3 and an MFR of 7 g/10 minutes was used. The resin mixtures of the A layer, the B layer and the C layer prepared in this manner are respectively supplied to the respective single screw melt extruders, which are respectively subjected to the 2,036,4, and then guided to the A layer/B layer/C layer type. The multi-manifold type τ-type die was extruded to a winding drum maintained at 3 ° C. 'Blowing cold air from the non-roller surface side and cooling and solidifying' to obtain the thickness ratio of each layer was A layer/B layer/ A polyolefin-based resin multilayer film having a C layer of 1% by weight/80%/10% and a film thickness of 150 μm. This film was formed into a protective sheet for a back surface of a solar cell in the same manner as in Example 1. Since the film was not added with polyethylene in the enamel layer, sufficient adhesion was not found between the film and the EVA. (Comparative Example 4) 100134724 43 201217163 As the resin used for the A layer and the c layer, 100 parts by weight of LLDPE with a melting point of 127 ° C, a density of 0.940 g/cm 3 , and an MFR of 5 g/10 min were used, and the melting point was 1503⁄4, and the density was mixed. 900. 900 g/cm 3 , MFR 7 g/10 minutes, and a vinyl content of 4 mol%, that is, 550 parts by weight of a resin mixture. The resin used as the layer B was the same as the layer B of Comparative Example 2. The resin mixtures of the A layer, the B layer, and the C layer prepared in this manner were respectively supplied to respective single screw melt extruders, respectively, according to 260. (: After melting, it is guided to a multi-manifold type τ-type die of the A layer/B layer/C layer type, extruded to a casting drum maintained at 3 ° C, and blown 25 ° C from the non-roller side The film was cooled and solidified by cold air to obtain a polyolefin-based resin multilayer film having a thickness ratio of each layer of layer A/B layer/C layer=10%/80%/10〇/〇 and a film thickness of 150 μm. The film was the same as in Example 1. The method of forming a solar cell back protective sheet. In the adhesion test with EVA, since the amount of the polypropylene-based resin added to the enamel layer is 550 parts by weight, the interface between the layer A and the EVA is peeled off, and the film cannot be obtained. (Comparative Example 5) As the resin used in the layer A, 100 parts by weight of LLDPE with a density of 127 ° C, a density of 940 MPa/cm 3 , and an MFR of 5 g/10 minutes was used, and a melting point of 150 ° was mixed. C. A resin mixture having a density of 0.900 g/cm3, MFR 7 g/10 minutes, and an ethylene content of 4 mol% of EPC 100 parts by weight. As a resin composition of the B layer, a density of 900.900 g/m is used with respect to a melting point of 160 ° C. 100 parts by weight of H-PP of cm3, MFR7g/l0, mixed into oxidation 100134724 44 〇

201217163 鈦母料A3重量份的樹脂混合物。 作為c層所使用的樹脂’係使用溶點160°C、密度 〇.900g/Cm3、MFR4g/10分、乙烯含有量7莫耳％的B_pp ’ 依照與實施例1相同的製法獲得太陽電池背面保護片。屬於 . 著色化劑的氧化鈦添加量係1.7重量％。 • 11玄/專膜係因為氧化鈦的濃度偏低’故在耐熱性試驗前便已 發現銅板透出，因而判斷為不佳。 (比較例6) 在比較例5中，除了將b層的氧化鈦母料a改為6〇〇重 1伤之外，其餘均依相同配方、相同製法獲得太陽電池用背 面保護片。屬於著色化劑的氧化鈦添加量係514重量％。 該薄膜在薄膜製造步驟中因為氧化鈦的濃度高，因而多處 發生凝集物’且凝集物阻塞喷嘴而產生孔洞，因而無法作成 薄膜。 (比較例7) A層係與比較例1相同配方。作為B層所使用的樹脂， 係使用相對於炫點116。(：、密度0.912g/cm3、MFR4g/10分 •的LDPE 100重置份’混合入氧化鈦母料B 30重量份的樹 月曰混&物。屬於著色化劑的氧化鈦添加量係13.8重量％。C 層係與比5為相同配方。將依此所準備的樹脂，分別供 應給各自的單螺桿炫融擠出機，分別依260°C溶融擠出後， 利用多歧管型T型模頭，獲得A層/B層/C層=1 〇%/70%/2〇〇/0 100134724 45 201217163 且薄膜厚度150μιη的聚烯烴系樹脂多層薄膜。將薄膜依與 貫施例1相同的方法形成太陽電池背面保護片。該薄膜在耐 熱性試驗中發生銅板透出情形。且，在Β層與C層的界面 處發生剝離情形。 (比較例8) Α層及Β層係與比較例丨相同配方。作為c層所使用的 樹脂，係使用熔點116。(：、密度〇.9i2g/cm3、MFR4g/l〇分 的LDPE。將依此所準備的樹脂’分別供應給各自的單螺桿 熔融擠出機，分別依260。(：熔融擠出後，利用多歧管型τ型 模頭’獲得A層/B層/C層=1 〇%/7〇%/2〇。/。且薄膜厚度 150μιη 的聚烯烴系樹脂多層薄膜。將薄膜依與實施例1相同的方法 形成太陽電池背面保護片。該薄膜在與EVA的接著性試驗 中’於B層與c層的界面處發生剝離情形。 (比較例9) 作為A層所使用的樹脂，係使用相對於熔點127。匸、密度 〇.940g/cm3、MFR5g/1〇 分的 LLDpE 1〇〇 重量份，混合入熔 點150C、密度0.900g/cm3、MFR7g/l〇分、乙婦含有量4 莫耳％之EPC 600重量份的樹脂混合物。 B層係與貫施例1相同配方。作為C層所使用的樹脂，係 使用熔點160〇C、密度0.900g/cm3、MFR4g/l〇分、乙烯含 有量7莫耳％的B_PP。將依此所準備的樹脂，分別供應給 各自的單螺桿炫融擠出機，分別依260°C炫融擠出後，利用 100134724 46 201217163 多歧管型T型模頭，獲得A層/B層/C層=20%/70%/10%且 薄膜厚度150μιη的聚烯烴系樹脂多層薄膜。將薄膜依與實 施例1相同的方法形成太陽電池背面保護片。該薄膜在與 EVA的接著性試驗中，Α層與EVA的密接力低。 100134724 47 201217163 s 8 8 Ο 2 ΟΟ201217163 Titanium masterbatch A3 parts by weight of resin mixture. The resin used in the c layer was obtained by using the same method as in Example 1 to obtain the back surface of the solar cell using a melting point of 160 ° C, a density of 900.900 g/cm 3 , an MFR of 4 g/10 minutes, and an ethylene content of 7 mol % B_pp '. Protective sheet. The amount of titanium oxide added to the coloring agent was 1.7 wt%. • Because the concentration of titanium oxide is too low, the copper plate has been found to pass out before the heat resistance test, so it is judged to be poor. (Comparative Example 6) In Comparative Example 5, a back surface protective sheet for a solar cell was obtained in the same manner and in the same manner except that the titanium oxide masterbb of the b layer was changed to a weight of 6 〇〇. The amount of titanium oxide added to the coloring agent was 514% by weight. In the film production step, since the concentration of titanium oxide is high, agglomerates are generated in a plurality of places, and the aggregates block the nozzle to cause voids, so that a film cannot be formed. (Comparative Example 7) The A layer was the same formulation as in Comparative Example 1. The resin used as the layer B is used in relation to the bright spot 116. (: density of 0.912 g/cm3, MFR4g/10 min. LDPE 100 reset part 'mixed into titanium oxide masterbatch B 30 parts by weight of eucalyptus mixture & 13.8% by weight. The C layer is the same formulation as that of 5. The resins prepared according to this are separately supplied to the respective single-screw smelting extruders, respectively, after being melted and extruded at 260 ° C, using a multi-manifold type. For the T-die, a polyolefin-based resin multilayer film having an A layer/B layer/C layer=1 〇%/70%/2〇〇/0 100134724 45 201217163 and a film thickness of 150 μm was obtained. The same method was used to form a solar cell back protective sheet which was exposed to a copper plate in a heat resistance test, and a peeling occurred at the interface between the tantalum layer and the layer C. (Comparative Example 8) The tantalum layer and the tantalum layer were Comparative Example The same formulation was used. As the resin used for the c layer, a melting point of 116 was used. (: LDPE having a density of 99i2g/cm3, MFR4g/l, and a resin prepared as described above was supplied to each of the respective resins) Single-screw melt extruder, respectively, according to 260. (: After melt extrusion, using multi-manifold type τ-type die' A polyolefin-based resin multilayer film having a film thickness of 150 μm and having a film thickness of A layer/B layer/C layer=1 〇%/7〇%/2 。. The film was formed into the back surface of the solar cell in the same manner as in Example 1. The film was peeled off at the interface between the layer B and the layer c in the adhesion test with EVA. (Comparative Example 9) The resin used as the layer A was used in relation to the melting point of 127. 匸, density 〇 .940g/cm3, MFR5g/1〇 LLDpE 1〇〇 part by weight, mixed into a melting point of 150C, a density of 0.900g/cm3, MFR7g/l〇, a female content of 4 mol% of EPC 600 parts by weight of resin The B layer was the same as that of Example 1. As the resin used for the C layer, B_PP having a melting point of 160 ° C, a density of 0.900 g/cm 3 , an MFR of 4 g / l, and an ethylene content of 7 mol % was used. The resin prepared according to the above is supplied to the respective single-screw smelting extruders, respectively, and extruded at 260 ° C, and then obtained by using a 100134724 46 201217163 multi-manifold type T-die to obtain the A layer/B. a polyolefin-based resin multilayer film having a layer/C layer of 20%/70%/10% and a film thickness of 150 μm. The film was subjected to Example 1 The method of forming a solar cell back surface protective sheet. Subsequently the test film to EVA, the EVA layer and the low Α adhesion. 100134724 47 201217163 s 8 8 Ο 2 ΟΟ

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丨比較例9| m 100 600 〇 13.8% 〇 f-H 150 ο ο r—Η ΟΝ + + + + 1 + + 00 馨 aJ 聲 m § 〇 〇 〇 〇 13.8% 〇 〇 ο CN ΟΝ + + + + + + 1 1 1、 军 聲 m Ο 00 〇 〇 〇 13.8% 〇 Γ-Η 〇 f-H ο (Ν 〇\ 1 1 + + 1 1 比較例6 雙 m ο 〇 〇 100 1 600 51.4% 〇 T—Η 150 〇 1—Η g ο 氧化鈦凝集、薄膜破裂。 比較例5 雙 m ο r—< 〇 〇 〇 I 1.7% I 〇 1—Η Ο ο 00 ο 1 + + + + + + 比較例4 100 550 100 1 13.8% I 〇 ♦—Η 〇 iT) KT) 1-Η Ο r—< g ο CN os + + 1 + + cn m 100 〇 〇 | 13.8% 〇 Γ-Η Ο γ—Η ο CN ΟΝ + + + + 1 + + CN Λ3 雙 m ο 〇 | 13.8% | 〇 〇 Ο Η ο 宕 m Os + + + + + + 1 1 比較例1 變 ο ο 〇 〇 cn | 13.8% | 〇 Ο § ο 〇\ I 1 + + + + 重量份 重量份 重量伤1 重量份1 |重量伤Ί 重量份 1重量份1 重量份 重量份 重量％ 重量份^ 重量份 重量份 1重量份1 1重量份1 a MFR S 〇 寸 卜 卜 寸 iT) 寸 寸 卜 卜 薄膜厚度 ffl υ 560nm之反射率(％)Α>§ 耐熱性試驗(銅板透出） 耐熱性試驗(厚度測定） Α層與EVA的接著性 A層與B層、或B層與C層的接著性 1溶點 P s-^ 卜 CN 〇 2 〇 VT) 〇 Ό r-H §： 127 116] 〇 162 〇 |密度1 r> ε 0.940 0.912 0.900 0.900 0.900] 0.912 0.952 0.940 0.912 0.900 0.900 0.900 / 1 直鏈狀低密度聚乙烯 高壓法低密度聚乙烯 同元聚丙烯 乙烯-丙烯無規共聚合體 同元聚丙烯 高壓法低密度聚乙烯 高密度聚乙烯 氧化鈦母料A 氧化鈦母料B 氧化氣添加量 直鏈狀低密度聚乙烯 高壓法低密度聚乙烯 乙烯-丙烯嵌段共聚合體 同元聚丙烯 乙烯-丙烯無規共聚合體 厚度構成比率 CQ U 6 寸^ir-Klool s 201217163 【圖式簡單說明】 圖1係為了耐熱性試驗而製作的模擬模組之概略剖視圖。 【主要元件符號說明】 A 玻璃板 B EVA層 C 銅板 D 聚烯烴系樹脂多層薄膜 E 雙軸延伸PET薄膜 F 太陽電池背面保護片 100134724 50丨Comparative example 9| m 100 600 〇13.8% 〇fH 150 ο ο r—Η ΟΝ + + + + 1 + + 00 馨 a a 声 m § 〇〇〇〇 13.8% 〇〇ο CN ΟΝ + + + + + + 1 1 1. Military sound m Ο 00 〇〇〇 13.8% 〇Γ-Η 〇fH ο (Ν 〇\ 1 1 + + 1 1 Comparative example 6 double m ο 〇〇100 1 600 51.4% 〇T-Η 150 〇 1—Η g ο Titanium oxide agglomerated, film ruptured. Comparative Example 5 Double m ο r—< 〇〇〇 I 1.7% I 〇1—Η ο ο 00 ο 1 + + + + + + Comparative Example 4 100 550 100 1 13.8% I 〇♦—Η TiT) KT) 1-Η Ο r—<g ο CN os + + 1 + + cn m 100 〇〇| 13.8% 〇Γ-Η Ο γ-Η ο CN ΟΝ + + + + 1 + + CN Λ3 double m ο 〇 | 13.8% | 〇〇Ο Η ο 宕m Os + + + + + + 1 1 Comparative example 1 change ο 〇〇 〇〇cn | 13.8% | 〇Ο § ο 〇 \ I 1 + + + + parts by weight by weight weight loss 1 part by weight 1 | weight scars 1 part by weight 1 part by weight parts by weight parts by weight ^ parts by weight 1 1 part by weight 1 a MFR S 〇 inch 卜卜 inch iT) inch film thickness ffl 560 560nm reflectance (%) Α> § heat resistance test (copper plate penetration) heat resistance test (thickness measurement) Α layer Adhesive layer A and layer B with EVA, or layer 1 of layer B and layer C. P s-^ Bu CN 〇2 〇 VT) 〇Ό rH §: 127 116] 〇162 〇|density 1 r> ε 0.940 0.912 0.900 0.900 0.900] 0.912 0.952 0.940 0.912 0.900 0.900 0.900 / 1 Linear Low Density Polyethylene High Pressure Low Density Polyethylene Ethylene Polypropylene Ethylene-Propylene Random Copolymer Monomer Polypropylene High Pressure Low Density Polyethylene High-density polyethylene titanium oxide masterbatch A Titanium oxide masterbatch B Oxidation gas addition amount Linear low-density polyethylene High-pressure method Low-density polyethylene ethylene-propylene block copolymerization homopolymer Polypropylene ethylene-propylene random copolymer thickness Composition ratio CQ U 6 inch ^ir-Klool s 201217163 [Simplified description of the drawings] Fig. 1 is a schematic cross-sectional view of a simulation module produced for heat resistance test. [Main component symbol description] A glass plate B EVA layer C copper plate D polyolefin resin multilayer film E Biaxially stretched PET film F Solar cell back protection sheet 100134724 50

Claims (1)

201217163 七、申請專利範圍： 1. 一種太陽電㈣面賴片用聚烯烴系樹脂多層薄膜 由A層/B層/C層等3層構成的薄膜，其中 於聚乙烯1〇0重量份混合聚丙烯系樹脂50〜500重量份的目^ 脂組成物所構成，B層係由著色化劑添加量為5〜5〇重量二 之聚丙稀系樹脂組成物所構成，q係由聚丙稀系樹脂。 物所禮点。 季專利範圍第1項之太陽電池背面保護片用聚稀煙 其中，上述Α層的聚乙稀係由直鏈狀低 “I乙“壓法低密度聚乙稀、或者料的混合樹脂 所構成。 .如申4專·圍第^貞之太陽電料面練以聚稀煙 ^脂多層薄膜，其中，上述B層的聚丙稀系樹脂組成物 中，聚丙稀系樹脂係由從同元聚丙烯、乙烯與丙稀的無規或 心又共承合體中選擇之至少—種以上樹脂、或者該等樹脂虚 2稀的混合樹脂所構成，且由聚乙稀含有量未滿樹脂成分 王體之30重量〇/0的樹脂所構成。 4.如中„月專利圍第！至3項中任一項之太陽電池背面保 護片用聚稀烴系樹脂多層薄膜，其中，聚稀烴系樹脂多層薄 膜之至少1個以上的層係添加紫外線吸收劑。 /η如t二專利範圍第1至3項中任一項之太陽電池背面保 5片用聚稀烴系樹脂多層薄膜’其中，多層薄膜之至少i 個以上的層係添加光安定劑。 100134724 51201217163 VII. Scope of application for patents: 1. A film composed of three layers of A-layer/B-layer/C-layer, which is a polyolefin-based resin multilayer film for solar cell (four)-side film, in which 1 〇 0 parts by weight of polyethylene is mixed and aggregated. The propylene resin is composed of 50 to 500 parts by weight of a composition of the resin, and the layer B is composed of a polypropylene resin composition having a coloring agent added in an amount of 5 to 5 ounces by weight, and the q layer is composed of a polypropylene resin. . The gift of things. In the solar cell back protective sheet of the first patent range, the polythene of the above-mentioned enamel layer is composed of a linear low-I-B" low-density polyethylene or a mixed resin. . For example, the solar electric material surface of the application of the 4th and the second is a polythene film, wherein the polypropylene resin composition of the B layer is made of the same polypropylene. A mixture of at least one or more resins selected from the group consisting of ethylene or propylene, or a mixture of resins of the above-mentioned resins, and the content of the polyethylene is less than 30 parts by weight of the resin component. /0 resin composition. 4. A polythene-based resin multilayer film for a solar cell back surface protective sheet according to any one of the above-mentioned items, wherein at least one layer of the poly-based resin-based multilayer film is added. In the solar cell back surface of the solar cell of any one of the first to third aspects of the invention, a polythene-based resin multilayer film is used, wherein at least one or more layers of the multilayer film are added with light. Stabilizer. 100134724 51
TW100134724A 2010-09-29 2011-09-27 Multilayered polyolefin resin film for back protection sheet for solar cell TW201217163A (en)

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