TW201920803A - 合成皮革之製造方法 - Google Patents
合成皮革之製造方法 Download PDFInfo
- Publication number
- TW201920803A TW201920803A TW107131083A TW107131083A TW201920803A TW 201920803 A TW201920803 A TW 201920803A TW 107131083 A TW107131083 A TW 107131083A TW 107131083 A TW107131083 A TW 107131083A TW 201920803 A TW201920803 A TW 201920803A
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- Prior art keywords
- moisture
- resin composition
- melt resin
- curable urethane
- synthetic leather
- Prior art date
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- 239000002649 leather substitute Substances 0.000 title claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 24
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- 239000011342 resin composition Substances 0.000 claims abstract description 38
- 239000012943 hotmelt Substances 0.000 claims abstract description 37
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 21
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims abstract description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 9
- 125000003277 amino group Chemical group 0.000 claims abstract description 8
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- 239000000155 melt Substances 0.000 claims 1
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- 230000000052 comparative effect Effects 0.000 description 9
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- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/02—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations
- B32B37/025—Transfer laminating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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Abstract
本發明所欲解決的課題在於提供一種製造實用上為能使用水準的合成皮革之方法，其不使用有機溶劑，且不需要交聯劑的交聯步驟。本發明提供一種合成皮革之製造方法，其係具有濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層的合成皮革之製造方法，其特徵為：前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物含有具有異氰酸酯基的胺基甲酸酯預聚物，且不含有具有羥基及/或胺基的交聯劑，藉由將前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物，塗布0.03~0.5kg/m2之量於基材，而形成其硬化物層。
Description
本發明關於合成皮革之製造方法。
以胺基甲酸酯樹脂為原料的合成皮革係廣泛利用於車輛內部裝飾材料、家具、透濕防水衣料等之製造。作為前述胺基甲酸酯樹脂，一般使用聚胺基甲酸酯的N,N-二甲基甲醯胺(以下，簡稱「DMF」)溶液。然而，DMF係在歐洲或中國大陸的使用管制被正規化，其使用之減低化或往無溶劑之轉移係成為當務之急。
又，合成皮革通常作為以基布、中間層及表皮層為必要層的積層體而形成，其製造方法一般經過：在離型紙上製作表皮層，在其上形成中間層，藉由接著劑將中間層貼合於基布之步驟，再者，由於在各步驟中需要乾燥，而有程序非常繁雜之問題點。
相對於其，作為省略此等的程序之方法，例如有揭示一種合成皮革之製造方法，其係在離型紙上塗布由聚胺基甲酸酯樹脂溶液與聚異氰酸酯交聯劑所構成的混合溶液，進行乾燥，於所得之皮膜的乾燥後立即加熱黏貼基布(例如，參照專利文獻1)。藉由此方法，由於能將所謂兼備中間層與表皮層之層予以一體形成，從程序的省略化之觀點來看具有優點。然而，由於需要交
聯劑及有機溶劑，而在交聯劑之交聯步驟及有機溶劑之乾燥步驟需要時間，難以短時間得到實用上為能使用水準的合成皮革。
專利文獻1 日本特開平7-229072號公報
本發明所欲解決的課題在於提供一種製造實用上為能使用水準的合成皮革之方法，其不使用有機溶劑，且不需要交聯劑的交聯步驟。
本發明提供一種合成皮革之製造方法，其係具有濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層的合成皮革之製造方法，其特徵為：前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物含有具有異氰酸酯基的胺基甲酸酯預聚物，且不含有具有羥基及/或胺基的交聯劑，藉由將前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物塗布0.03~0.5kg/m2之量於基材，而形成其硬化物層。
依照本發明的合成皮革之製造方法，由於使用環境對應型的無溶劑樹脂組成物，不需要有機溶劑的乾燥步驟，還有由於不使用交聯劑，亦不需要其交聯步驟，可達成實用上為能使用水準的合成皮革之製造時
間的縮短化。又，由於藉由濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層，可將中間層與表皮層予以1層化，可達成合成皮革的製程之省力化。
本發明的合成皮革之製造方法係具有濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層的合成皮革之製造方法，其必須：前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物含有具有異氰酸酯基的胺基甲酸酯預聚物，且不含有具有羥基及/或胺基的交聯劑，藉由將前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物塗布0.03~0.5kg/m2之量於基材，而形成其硬化物層。
前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物含有具有異氰酸酯基的胺基甲酸酯預聚物作為必要成分，且不含有具有羥基及/或胺基的交聯劑。若使用前述交聯劑，則由於需要交聯步驟，無法達成合成皮革的製造時間之縮短化。
作為前述交聯劑，例如可舉出聚醚多元醇、聚碳酸酯多元醇、聚酯多元醇、聚丙烯酸多元醇、二聚物二醇等之具有羥基的交聯劑；乙二胺、四亞甲基二胺、六亞甲基二胺、二伸乙三胺、三伸乙四胺、聯胺、哌、二胺基二苯基甲烷、甲苯二胺、苯二甲基二胺、異佛爾酮二胺、降烷二胺等之具有胺基的交聯劑等。
作為前述具有異氰酸酯基的胺基甲酸酯預聚物，例如可使用多元醇(a)與聚異氰酸酯(b)之反應物。
作為前述多元醇(a)，例如可舉出聚酯多元醇、聚醚多元醇、聚碳酸酯多元醇、聚丙烯酸多元醇、聚烯烴多元醇等。此等之多元醇係可單獨使用，也可併用2種以上。於此等之中，從與前述熱熔胺基甲酸酯預聚物(A)反應而得到具有良好的手感之合成皮革之觀點來看，較佳為使用聚醚多元醇。
作為前述聚醚多元醇，例如可使用聚氧乙烯多元醇、聚氧丙烯多元醇、聚氧四亞甲基多元醇、聚氧乙烯聚氧丙烯多元醇、聚氧乙烯聚氧四亞甲基多元醇、聚氧丙烯聚氧四亞甲基多元醇等。此等之聚醚多元醇係可單獨使用，也可併用2種以上。
前述多元醇(a)之數量平均分子量，從所得之皮膜的機械強度及手感之觀點來看，較佳為500~10,000之範圍，更佳為700~7,000之範圍。還有，前述多元醇(a)之數量平均分子量係表示藉由凝膠滲透層析(GPC)法所測定之值。
於前述多元醇(a)中，視需要可併用鏈伸長劑。再者，於本發明中，在製造前述胺基甲酸酯預聚物時，有前述多元醇(a)或前述鏈伸長劑的未反應物殘留在組成物中之可能性，但此未反應物係不作為交聯劑考慮。
作為前述鏈伸長劑，例如可使用乙二胺、1,2-丙二胺、1,6-六亞甲基二胺、哌、2,5-二甲基哌、異佛爾酮二胺、1,2-環己烷二胺、1,3-環己烷二胺、1,4-
環己烷二胺、4,4’-二環己基甲烷二胺、3,3’-二甲基-4,4’-二環己基甲烷二胺、聯胺等之具有胺基的鏈伸長劑；乙二醇、二乙二醇、三乙二醇、丙二醇、二丙二醇、1,3-丙二醇、1,3-丁二醇、1,4-丁二醇、六亞甲基二醇、蔗糖、甲二醇、甘油、山梨糖醇、雙酚A、4,4’-二羥基二苯基、4,4’-二羥基二苯基醚、三羥甲基丙烷等之具有羥基的鏈伸長劑等。此等之鏈伸長劑係可單獨使用，也可併用2種以上。
作為前述聚異氰酸酯(b)，例如可使用伸苯基二異氰酸酯、甲苯二異氰酸酯、二苯基甲烷二異氰酸酯、萘二異氰酸酯、聚亞甲基聚苯基聚異氰酸酯、碳二亞胺化二苯基甲烷聚異氰酸酯等之芳香族聚異氰酸酯；六亞甲基二異氰酸酯、離胺酸二異氰酸酯、環己烷二異氰酸酯、異佛爾酮二異氰酸酯、二環己基甲烷二異氰酸酯、苯二甲基二異氰酸酯、四甲基苯二甲基二異氰酸酯、二聚酸二異氰酸酯、降烯二異氰酸酯等之脂肪族或脂環式聚異氰酸酯等。此等之聚異氰酸酯係可單獨使用，也可併用2種以上。於此等之中，從藉由濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層，將中間層與表皮層予以1層化，得到優異透明性、耐咬泡性、手感及機械強度之觀點來看，較佳為使用芳香族聚異氰酸酯，更佳為使用二苯基甲烷二異氰酸酯。
作為前述胺基甲酸酯預聚物之製造方法，例如可藉由在裝有前述聚異氰酸酯(b)的反應容器中，加入前述多元醇(a)及視需要的前述鏈伸長劑，於前述聚異
氰酸酯(b)所具有的異氰酸酯基相對於前述多元醇(a)等所具有的羥基而言成為過剩之條件下反應而製造。
從機械強度之觀點，前述胺基甲酸酯預聚物之異氰酸酯基的含有率(以下，簡稱「NCO%」)較佳為1.1~5質量%之範圍，更佳為1.5~4質量%之範圍。再者，前述胺基甲酸酯預聚物之NCO%表示依據JIS K1603-1：2007，藉由電位差滴定法所測定之值。
本發明所用的濕氣硬化型胺基甲酸酯熱熔樹脂組成物含有前述胺基甲酸酯預聚物，且不含有前述交聯劑，但視需要亦可含有其它的添加劑。
作為前述其它的添加劑，例如可使用胺基甲酸酯化觸媒、矽烷偶合劑、搖變性賦予劑、抗氧化劑、可塑劑、填充材、蠟等。此等之添加劑係可單獨使用，也可併用2種以上。
接著，說明本發明的合成皮革之製造方法。
本發明的合成皮革之製造方法係藉由將前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物，以0.03~0.5kg/m2之量塗布於基材，而形成其硬化物層。
前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物之塗布量必須為0.03~0.5kg/m2之範圍。藉由塗布量為此範圍，則即使藉由濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層，將中間層與表皮層予以1層化，也可得到優異的透明性、耐咬泡性、手感及機械強度。從能更加提高此等的特性之觀點來看，前述塗布量較佳為0.1~0.3kg/m2之範圍，更佳為0.1~0.2kg/m2。
具體而言，例如可舉出：(i)在離型基材上，塗布前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物，接著，將該塗布面貼合於離型基材以外的基材，然後，使濕氣硬化型胺基甲酸酯熱熔樹脂組成物濕氣硬化，而在前述離型基材以外的基材上形成濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層之方法；(ii)藉由將前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物塗布於離型基材以外的基材，然後，使濕氣硬化型胺基甲酸酯熱熔樹脂組成物濕氣硬化，而在前述離型基材以外的基材上形成濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層之方法等。
作為前述離型基材以外的基材，例如可使用聚酯纖維、聚乙烯纖維、尼龍纖維、丙烯酸纖維、聚胺基甲酸酯纖維、乙酸酯纖維、嫘縈纖維、聚乳酸纖維、棉、麻、絲綢、羊毛、玻璃纖維、碳纖維、彼等之混紡纖維等的不織布、織布、針織物；於前述不織布中含浸有聚胺基甲酸酯樹脂等樹脂者；於前述不織布上更設有多孔質層者；熱塑性胺基甲酸酯(TPU)等之樹脂基材等。
作為在前述離型基材或離型基材以外的基材上，塗布前述濕氣硬化型胺基甲酸酯熱熔樹脂組成物之方法，例如可舉出使用塗抹器、輥塗機、噴塗機、T字模塗布機、刮刀塗布機、缺角輪塗布機等之方法。
於前述塗布後，以濕氣硬化型胺基甲酸酯熱熔樹脂組成物之熟成(濕氣硬化)為目的，例如可在20~80℃之溫度，進行0.5~7天的後硬化。
以上，藉由本發明的合成皮革之製造方法，由於使用環境對應型的無溶劑樹脂組成物，而不需要有機溶劑的乾燥步驟，還有由於不使用交聯劑，亦不需要其交聯步驟，可達成合成皮革之製造時間的縮短化。又，由於藉由濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層，將中間層與表皮層予以1層化，可達成合成皮革之製程的省力化。
以下，使用實施例，更詳細說明本發明。
於具備溫度計、攪拌機、非活性氣體導入口及回流冷卻器之反應容器中，加入250質量份的聚氧四亞甲基二醇(數量平均分子量；1,000)、250質量份的聚酯多元醇(1,6-己二醇與己二酸之反應物，數量平均分子量；2,000)，於減壓條件下脫水，直到水分含有率成為0.05質量%以下為止。
接著，添加133質量份的4,4’-二苯基甲烷二異氰酸酯，升溫到110℃為止，反應約2小時，直到異氰酸酯基的含有率成為一定為止，得到胺基甲酸酯預聚物(A-1)。
將胺基甲酸酯預聚物(A-1)在110℃熔融後，於經設置在輥塗機的離型紙上，以0.2kg/m2之量塗布後，於有
黏性的狀態下與含浸有胺基甲酸酯樹脂的不織布(以下，簡稱「含浸不織布」)貼合，於溫度23℃、濕度50%RH之環境下放置2天，得到合成皮革。
除了將塗布量及/或基材變更為如表1~2中所示以外，與實施例1同樣地得到合成皮革。
將胺基甲酸酯預聚物(A-1)在110℃熔融後，於經設置在輥塗機的熱塑性胺基甲酸酯薄膜(以下簡稱「TPU」)上，以0.2kg/m2之量塗布後，於溫度23℃、濕度50%RH之環境下放置2天，得到合成皮革。
於具備溫度計、攪拌機、非活性氣體導入口及回流冷卻器之反應容器中，加入100質量份的聚氧四亞甲基二醇(數量平均分子量；1,000)、100質量份的聚酯多元醇(1,6-己二醇、新戊二醇及己二酸之反應物，數量平均分子量；2,000)，於減壓條件下脫水，直到水分含有率成為0.05質量%以下為止。
接著，添加99質量份的4,4’-苯二甲基二異氰酸酯，升溫到80℃為止，反應約6小時，直到異氰酸酯基的含有率成為一定為止，得到胺基甲酸酯預聚物(A-2)。
隨後，將胺基甲酸酯預聚物(A-2)在110℃熔融後，以相對於100質量份的前述(A-2)而言成為20質量份之方式，混合聚丙二醇(數量平均分子量：1,000，以下簡稱「PPG」)，於經設置在輥塗機的離型紙上，將此混合物以0.2kg/m2之量塗布後，於有黏性的狀態下與含浸有胺基甲酸酯樹脂的含浸不織布貼合，於溫度23℃、濕度50%RH之環境下放置5天，得到合成皮革。
目視觀察實施例及比較例所得之合成皮革的外觀，如以下地評價。
「○」：濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層為透明，良好地看見基底基材。
「×」：濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層為混濁。
手揉實施例及比較例所得之合成皮革，如以下地評價。
「○」：柔軟，有豐實感。
「×」：硬的，或感覺不到豐實感。
對於實施例及比較例所得之合成皮革，使用東洋精機製作所股份有限公司製「MIT彎曲試驗機」，於常溫
(23℃)下進行10萬次的彎曲試驗，若在表面沒有龜裂發生則評價為「○」，若為在試驗途中有龜裂發生之情況則評價為「×」。
於實施例及比較例所得之合成皮革中，在濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層上，於130℃費5秒黏著熱熔布膠帶後，使用Tensilon(ORIENTEC股份有限公司製Tensilon萬能試驗機「RTC-1210A」)，於十字頭測度；200mm/分鐘之條件下測定剝離強度，當作常態的剝離強度。將2kg/cm以上者評價為「○」，將其以外者評價為「×」。
於本發明之實施例1~6中，不使用有機溶劑，且不需要交聯劑的交聯步驟，可以短時間製造合成皮革。又，所得之合成皮革係外觀、手感、彎曲性及剝離強度亦優異，實用上為能使用的水準。
另一方面，比較例1係濕氣硬化型胺基甲酸酯熱熔樹脂組成物之塗布量低於本發明規定的範圍之態樣，豐實感不足，無法得到實用上為能使用水準之合成皮革。
比較例2係濕氣硬化型胺基甲酸酯熱熔樹脂組成物之塗布量超過本發明規定的範圍之態樣，手感變硬，剝離強度亦低，無法得到實用上為能使用水準之合成皮革。
比較例3係使用含有具有羥基的交聯劑之濕氣硬化型胺基甲酸酯熱熔樹脂組成物之態樣，在交聯劑的交聯反應上費時，濕氣硬化型胺基甲酸酯熱熔樹脂組成物之熟成時間需要5天。
Claims (3)
- 一種合成皮革之製造方法，其係具有濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層的合成皮革之製造方法，其特徵為：該濕氣硬化型胺基甲酸酯熱熔樹脂組成物含有具有異氰酸酯基的胺基甲酸酯預聚物，且不含有具有羥基及/或胺基的交聯劑，藉由將該濕氣硬化型胺基甲酸酯熱熔樹脂組成物塗布0.03~0.5kg/m2之量於基材，而形成其硬化物層。
- 如請求項1之合成皮革之製造方法，其係藉由(i)在離型基材上，塗布該濕氣硬化型胺基甲酸酯熱熔樹脂組成物，接著，將該塗布面貼合於離型基材以外的基材，或(ii)將該濕氣硬化型胺基甲酸酯熱熔樹脂組成物塗布於離型基材以外的基材，而形成濕氣硬化型胺基甲酸酯熱熔樹脂組成物之硬化物層。
- 如請求項1或2之合成皮革之製造方法，其中該具有異氰酸酯基的胺基甲酸酯預聚物係以二苯基甲烷二異氰酸酯作為原料。
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| CN112442330A (zh) * | 2020-11-30 | 2021-03-05 | 山东华诚高科胶粘剂有限公司 | 一种合成革面用热熔胶及其制备方法与应用 |
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| JP5360516B1 (ja) * | 2012-04-12 | 2013-12-04 | Ｄｉｃ株式会社 | 湿気硬化型ポリウレタンホットメルト樹脂組成物、接着剤及び物品 |
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| JP6355010B1 (ja) * | 2016-12-16 | 2018-07-11 | Dic株式会社 | 合成皮革 |
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| CN111108245A (zh) | 2020-05-05 |
| KR102428612B1 (ko) | 2022-08-04 |
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| US20200262964A1 (en) | 2020-08-20 |
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