JPH01184131A - Packing material having good bag rupture resistance - Google Patents
Packing material having good bag rupture resistanceInfo
- Publication number
- JPH01184131A JPH01184131A JP63009402A JP940288A JPH01184131A JP H01184131 A JPH01184131 A JP H01184131A JP 63009402 A JP63009402 A JP 63009402A JP 940288 A JP940288 A JP 940288A JP H01184131 A JPH01184131 A JP H01184131A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- propylene
- copolymer
- olefin
- surface layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title abstract description 7
- 238000012856 packing Methods 0.000 title abstract 3
- 239000010410 layer Substances 0.000 claims abstract description 16
- 239000002344 surface layer Substances 0.000 claims abstract description 15
- 239000004711 α-olefin Substances 0.000 claims abstract description 10
- 229920001577 copolymer Polymers 0.000 claims abstract description 8
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 8
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 7
- 229920005629 polypropylene homopolymer Polymers 0.000 claims abstract description 6
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims abstract description 5
- 239000005022 packaging material Substances 0.000 claims description 17
- 229920000098 polyolefin Polymers 0.000 claims description 6
- 229920005653 propylene-ethylene copolymer Polymers 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 13
- 229920001155 polypropylene Polymers 0.000 abstract description 6
- 238000002156 mixing Methods 0.000 abstract description 5
- 229920000642 polymer Polymers 0.000 abstract description 3
- 229920002959 polymer blend Polymers 0.000 abstract description 3
- 229920001038 ethylene copolymer Polymers 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 1
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 12
- -1 polypropylene Polymers 0.000 description 11
- 238000004806 packaging method and process Methods 0.000 description 10
- 238000007789 sealing Methods 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 229920006378 biaxially oriented polypropylene Polymers 0.000 description 3
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000010030 laminating Methods 0.000 description 3
- CKQVRZJOMJRTOY-UHFFFAOYSA-N octadecanoic acid;propane-1,2,3-triol Chemical compound OCC(O)CO.CCCCCCCCCCCCCCCCCC(O)=O CKQVRZJOMJRTOY-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 229920005606 polypropylene copolymer Polymers 0.000 description 2
- VYWRBUBXZALATG-UHFFFAOYSA-N 2-hydroxyoctadecanamide Chemical compound CCCCCCCCCCCCCCCCC(O)C(N)=O VYWRBUBXZALATG-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 240000000972 Agathis dammara Species 0.000 description 1
- 229920002871 Dammar gum Polymers 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 241000238631 Hexapoda Species 0.000 description 1
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 1
- 239000013032 Hydrocarbon resin Substances 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N ethyl ethylene Natural products CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229920006270 hydrocarbon resin Polymers 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920005547 polycyclic aromatic hydrocarbon Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
-
- 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
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、優れた耐破裂製を有する包装材料に関し、さ
らに材料を選ぶことにより低温熱接着性高透明性をあわ
せ有する包装材料に関する。特に−度箱体等に収容した
形で包装された又は無包装状態の集合体を再度密封包装
するのに適した包装材料を提供することにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a packaging material having excellent burst resistance, and furthermore, by selecting materials, to a packaging material having low temperature thermal adhesion and high transparency. In particular, it is an object of the present invention to provide a packaging material suitable for re-sealing an aggregate packaged in a box or the like or in an unpackaged state.
近年食品、タバコ、工業用品、日用雑貨品等の外装に対
し高度な要求が高まっている。例えば食品包装では防湿
性、保香性、防虫性、酸素遮断性等外装材の特性もさる
ことながら、包装時の熱接着部の密封不足、接着強度不
足、包装材の皺による折重なり部からの気密不良による
問題等が重視されてきている。又、包装形態も個包装か
ら集積包装へ移行してきたため、流通過程における衝撃
に対する耐破袋性が要求されてきている。In recent years, sophisticated demands have been placed on the packaging of foods, cigarettes, industrial goods, daily necessities, etc. For example, in food packaging, in addition to the characteristics of the exterior material such as moisture resistance, aroma retention, insect repellency, and oxygen barrier properties, there are also problems such as insufficient sealing of the thermally bonded part during packaging, insufficient adhesive strength, and folds due to wrinkles in the packaging material. Problems caused by poor airtightness are becoming more and more important. Furthermore, as the packaging format has shifted from individual packaging to integrated packaging, there has been a demand for bag breakage resistance against impact during the distribution process.
（従来の技術）
このようなオーバーラツプ分野に二軸延伸ポリプロピレ
ンフィルムを使用すべくこれに低温シール性を付与する
方法としては、エチレン−プロピレン共重合体とポリブ
テン−１のブレンド組成物をポリプロピレン二軸延伸フ
ィルムの表面に積層する方法（特公昭６２−３７６６４
号公報）、プロピレン−ブテン１共重合体を二軸配向ポ
リプロピレンフィルムの表面に積層する方法（特公昭６
２−２５１０２号公報）等数多く提案されている。しか
しながら、低温熱接着性、高透明性、耐スクラッチ性は
満足するが、衝撃に対する耐破袋性については満足すべ
きものとは、いい難い。(Prior art) As a method of imparting low-temperature sealing properties to a biaxially oriented polypropylene film for use in such overlap fields, a blend composition of an ethylene-propylene copolymer and polybutene-1 has been added to a biaxially oriented polypropylene film. Method of laminating on the surface of stretched film (Japanese Patent Publication No. 62-37664
(Japanese Patent Publication No. 6), a method of laminating a propylene-butene 1 copolymer on the surface of a biaxially oriented polypropylene film (Japanese Patent Publication No. 6)
2-25102), etc., have been proposed. However, although the low-temperature thermal adhesion, high transparency, and scratch resistance are satisfactory, the bag tear resistance against impact is not satisfactory.
（発明が解決しようとする課題）
本発明者らは、前記問題点について鋭意検討した結果、
基層のポリプロピレン単独重合体にプロピレン−α・オ
レフィン共重合体及び低分子量熱可塑性樹脂をブレンド
することにより解決しうろことを見い出したのである。(Problems to be Solved by the Invention) As a result of intensive study on the above-mentioned problems, the present inventors found that
They found that the problem could be solved by blending a propylene-α-olefin copolymer and a low molecular weight thermoplastic resin with the polypropylene homopolymer of the base layer.
本発明の目的は、衝撃に対する耐破袋性に優れさらに材
料を選ぶことにより低温熱接着性、密封性、高透明性の
良好な包装材料を提供することにある。An object of the present invention is to provide a packaging material that has excellent bag breakage resistance against impact and, by selecting materials, has good low-temperature thermal adhesion, sealing performance, and high transparency.
すなわち本発明はポリプロピレン単独重合体２０′−７
８（重Ｍ）％と、プロピレン−α・オレフィン共重合体
６０〜２０（重量）％、及び低分子量熱可塑性樹脂２０
〜２（重量）％を有する混合体により形成された基層の
少なくとも片面が、少なくとも１４５℃以下の融点より
なるオレフィン系重合体により形成された表面層である
耐破袋性に優れた包装材料である。That is, the present invention uses polypropylene homopolymer 20'-7
8% (by weight), 60 to 20% (by weight) of propylene-α-olefin copolymer, and 20% (by weight) of low molecular weight thermoplastic resin.
A packaging material with excellent bag breakage resistance, in which at least one side of the base layer formed of a mixture having a content of ~2% (by weight) is a surface layer formed of an olefin polymer having a melting point of at least 145°C or lower. be.
基体フィルム層を形成するポリプロピレン単独重合体は
アイツタクチイック指数８５以上のアイツタクチイック
ポリプロピレンで固有粘度（１３５℃テトラリン溶液）
が１．６〜３．０ｄｌ／ｇであるのが好ましい。特に１
．８〜２．５ａ／ｇであるのが好ましい。The polypropylene homopolymer forming the base film layer is a tactical polypropylene with a tactical index of 85 or higher and an intrinsic viscosity (135°C tetralin solution).
is preferably 1.6 to 3.0 dl/g. Especially 1
．． It is preferable that it is 8-2.5a/g.
固有粘度が１．６ａ／ｇ未満では透明な包装材料を得ら
れず、又３．Ｏａ／ｇを超えると押出性が低下し、特に
本発明として好適な複合体包装体のための包装材料には
外観が悪く、光沢の悪い、内部の商品価値を低下するよ
うな包装体になってしまう。If the intrinsic viscosity is less than 1.6 a/g, a transparent packaging material cannot be obtained, and 3. If it exceeds Oa/g, the extrudability decreases, and the packaging material for the composite packaging body particularly suitable for the present invention has a poor appearance, poor gloss, and a packaging body that reduces the internal commercial value. It ends up.
又、本発明において用いるプロピレンとα・オレフィン
との共重合体はプロピレンを７０〜９５（重量）％と炭
素数が４〜１０のα・オレフィン３０〜５（重量）％と
を共重合成分として含有した共重合体である。Further, the copolymer of propylene and α-olefin used in the present invention contains 70 to 95% (by weight) of propylene and 30 to 5% (by weight) of α-olefin having 4 to 10 carbon atoms as copolymerization components. It is a copolymer containing
本発明において用いる低分子量熱可塑性樹脂としては炭
化水素樹脂、ロジン、ダンマル、フェノール樹脂、塩素
化脂肪族炭化水素ワックス、塩素化多核芳香族炭化水素
などがある。本発明における基層は更にその性質を低下
させない量の他の重合体を含有してもよく、また帯電防
止剤、滑剤、ブロッキング防止剤等を含有してもよい。Examples of the low molecular weight thermoplastic resin used in the present invention include hydrocarbon resins, rosin, dammar, phenolic resins, chlorinated aliphatic hydrocarbon waxes, and chlorinated polynuclear aromatic hydrocarbons. The base layer in the present invention may further contain other polymers in amounts that do not deteriorate its properties, and may also contain antistatic agents, lubricants, antiblocking agents, and the like.
表面層を形成するオレフィン系重合体は、融点が１４５
℃以下のオレフィン系重合体であれば単独重合体、共重
合体、ある、いはオレフィン系重合体の混合物であって
よいが好ましくはプロピレン−エチレン共重合体２０〜
９４（重量）％と炭素数が４以上１０以下のα−オレフ
ィンとプロピレンとの共重合体８０〜６（重量）％とを
有する重合体混合物である。The olefin polymer that forms the surface layer has a melting point of 145
The olefin polymer may be a homopolymer, a copolymer, or a mixture of olefin polymers as long as the temperature is below ℃, but preferably propylene-ethylene copolymer 20~
It is a polymer mixture containing 94% (by weight) of a copolymer of propylene and an α-olefin having 4 or more and 10 or less carbon atoms and 80 to 6% (by weight).
本発明の包装材料は基層、表面層の接着は接着剤を用い
て複合することも出来るが、最も経済的には基層と表面
層を別個の押出機から押出し、溶融状態で複合流をつく
り押出成形する共押出法、或いは別個に溶融押出して後
冷却固化する前にラミネートする方法、又は一方が冷却
固化したフィルム又はシートに他方の溶融押出状態のフ
ィルムを接着する方法等の複合状のフィルム又はシート
を得る方法で得ることができる。本方法は平板状フィル
ム、円環状フィルムのいずれでもよく、本発明フィルム
は未延伸でも用いうるが少なくとも一軸延伸することが
好ましい。特に好ましくは２軸延伸することにより一層
有効な密封材料を提供する。In the packaging material of the present invention, the base layer and surface layer can be bonded together using an adhesive, but the most economical method is to extrude the base layer and surface layer from separate extruders, create a composite flow in the molten state, and then extrude. Composite films or sheets, such as a co-extrusion method of molding, a method of separately melt-extruding and laminating before cooling and solidifying, or a method of gluing one film or sheet cooled and solidified to the other melt-extruded film, etc. It can be obtained by obtaining a sheet. This method may be applied to either a flat film or an annular film, and although the film of the present invention can be used even if it is not stretched, it is preferable to stretch it at least uniaxially. Particularly preferably, biaxial stretching provides a more effective sealing material.
本発明に用いる包装材料の特徴は加熱ロールを縦延伸時
に用いる逐次２軸延伸法においても製造出来る点にあり
、勿論同時延伸でも一層容易である逐次２軸延伸では眉
間に強固な複合層の結合力を得て良好なヒートシール強
度を有する包装材料を得ることが出来、且つ経済的に積
層体を生産しうる点から本発明における積層フィルムの
意義は極めて高い。A feature of the packaging material used in the present invention is that it can be manufactured by the sequential biaxial stretching method that uses heated rolls during longitudinal stretching.Of course, simultaneous stretching is easier, but sequential biaxial stretching creates a strong composite layer bond between the eyebrows. The laminated film in the present invention is extremely significant in that it is possible to obtain a packaging material with good heat-sealing strength and to economically produce a laminate.
延伸する場合の好適な条件を次に述べる。１軸延伸する
場合には縦方向あるいは横方向に３．５〜１０倍延伸す
る。延伸温度はロール延伸する場合は１００〜１６０“
Ｃ、テンター延伸する場合は１４０〜１６５℃であるの
が通常である。本発明においてはフィルムを逐次２軸延
伸する場合は縦方向に３．５〜１０倍、好ましくは３．
８〜７．５倍、横方向には４〜１２倍、好ましくは６〜
９倍延伸する。同時２軸延伸する場合は１４０〜１６５
℃で行う。逐次２軸延伸する場合は第１段は１００℃〜
１６０℃１好ましくは１１０℃〜１３０℃１第２段は１
４０℃〜１６５℃１好ましくは１４５℃〜１６０℃であ
る。熱固定は１軸延伸後あるいは２軸延伸後に行ない、
その温度は上記延伸温度以上であり、
かつ１４０℃〜１６７℃で１秒〜１分程度である。Suitable conditions for stretching will be described below. In the case of uniaxial stretching, it is stretched 3.5 to 10 times in the longitudinal or transverse direction. The stretching temperature is 100 to 160" for roll stretching.
C. In the case of tenter stretching, the temperature is usually 140 to 165°C. In the present invention, when the film is sequentially biaxially stretched, the longitudinal direction is 3.5 to 10 times, preferably 3.
8 to 7.5 times, 4 to 12 times in the lateral direction, preferably 6 to 12 times
Stretch 9 times. 140-165 for simultaneous biaxial stretching
Perform at °C. In the case of sequential biaxial stretching, the temperature in the first stage is 100℃~
160°C 1 Preferably 110°C to 130°C 1 2nd stage 1
40°C to 165°C, preferably 145°C to 160°C. Heat setting is performed after uniaxial or biaxial stretching,
The temperature is higher than the above-mentioned stretching temperature, and is 140°C to 167°C for about 1 second to 1 minute.
本発明で用いる積層包装材料の厚さの範囲はその密封包
装体としての用途に応じて決められるが通常５〜１５０
μの範囲である。繁用されるのは１５〜１１０μの範囲
である。かっ、その表面層の合計厚みは積層包装材料全
体の厚み０．２〜５０％の範囲である。自動包装機によ
り密封包装体とする場合には上記の厚み比を満足しかつ
個々の表面層の厚みが０．２〜１０μ特に０．２〜３μ
である範囲が好ましい。The thickness range of the laminated packaging material used in the present invention is determined depending on its use as a sealed package, but is usually 5 to 150 mm.
It is in the range of μ. A commonly used range is 15-110μ. The total thickness of the surface layer is in the range of 0.2 to 50% of the total thickness of the laminated packaging material. When the package is sealed using an automatic packaging machine, the above thickness ratio is satisfied and the thickness of each surface layer is 0.2 to 10μ, especially 0.2 to 3μ.
A range of .
（実施例）
実施例１
基層として固有粘度２．０ｄ１／ｇ （１３５℃テトラ
リン溶液使用）のアイツタクチイックポリプロピレン４
０（重量）％と、エチレン含有量５．０（重量）％のプ
ロピレン−エチレン共重合体（メルトインデックス３．
０ｇ／１０分、及び低分子量熱可塑性樹脂（荒用林産社
製石油樹脂：アルコンＰ １２５２０重量％含有）２
０重重量からなる混合組成物の１００（重量）部に対し
、グリセリンのステアリン酸エステルを０．５（重量）
部、アルキルアミンエチレンオキシド付加物を１．０（
重量）部混合した組成とした。(Example) Example 1 Aitsu Tactical Polypropylene 4 with an intrinsic viscosity of 2.0 d1/g (135°C tetralin solution used) as a base layer
propylene-ethylene copolymer with an ethylene content of 5.0% (by weight) and a melt index of 3.0% (by weight).
0 g/10 min, and low molecular weight thermoplastic resin (petroleum resin manufactured by Arayo Forestry Co., Ltd.: containing 12520% by weight of Alcon P) 2
0.5 (weight) of glycerin stearate to 100 (weight) parts of a mixed composition consisting of 0 weight
parts, alkylamine ethylene oxide adduct 1.0 (
) parts by weight were mixed.
一方表面層としてエチレン４．５（重量）％のプ＝ ７
＝
ロピレン／エチレン共重合体（メルトインデックス２．
０ｇ／１０分）４０（重量）％とプロピレン含有率８５
（重量）％のプロピレン／ブテン−１共重合体６０（重
量）％の重合体混合物１００（重量）部にグリセリン脂
肪酸エステル０．３（重量）部、ヒドロキシステアロア
ミド（日本化成製、ダイアミドＫ１１）０．３（重量）
部を混合した組成物を用いた。該基層Ａ及び表面の組成
物を２台の押出機から溶融押出しし、３層未延伸フィル
ムを得た。該未延伸フィルムは９６０μの厚みを有し、
１３０℃に於いて縦方向に４．０倍延伸し、引続いて横
方向に８．０倍延伸し、１５５℃で５％飽和熱固定を行
った後２０℃の空気を強制的に吹付けして冷却し、厚さ
３０μの２軸延伸複合フィルムを得た。このフィルムで
オーディオ用カセットケース３巻と５巻を集積包装し、
床上７５ｃｍ１００ｃｎ＋より自然落下させ耐破袋性を
確認した。On the other hand, the surface layer contains 4.5% (by weight) of ethylene = 7
= Ropylene/ethylene copolymer (melt index 2.
0g/10min) 40 (weight)% and propylene content 85
(by weight)% propylene/butene-1 copolymer, 100 parts (by weight) of a 60% (by weight) polymer mixture, 0.3 parts (by weight) of glycerin fatty acid ester, hydroxystearamide (manufactured by Nippon Kasei Co., Ltd., Diamide K11) )0.3 (weight)
A composition obtained by mixing parts was used. The base layer A and surface compositions were melt-extruded from two extruders to obtain a three-layer unstretched film. The unstretched film has a thickness of 960μ,
Stretched 4.0 times in the machine direction at 130°C, then 8.0 times in the transverse direction, heat set at 5% saturation at 155°C, and then forcedly blown with air at 20°C. The mixture was cooled to obtain a biaxially stretched composite film having a thickness of 30 μm. Using this film, audio cassette cases volumes 3 and 5 are integrated and packaged.
The bag was allowed to fall naturally from a height of 75 cm and 100 cm+ on the floor to confirm its tear resistance.
比較例１
基層として、固有粘度２．Ｏｄ／ｇ （１３５℃テトラ
リン溶液使用）のアイツタクチイックポリプロピレン１
００（重量）部に対し、グリセリンのステアリン酸エス
テルを０．５（重量）部、アルキルアミンエチレンオキ
シド付加物１．０（重量）部混合した組成とした。Comparative Example 1 As a base layer, the intrinsic viscosity was 2. Od/g (using tetralin solution at 135°C) of tactical polypropylene 1
The composition was prepared by mixing 0.5 parts (by weight) of glycerin stearate and 1.0 parts (by weight) of an alkylamine ethylene oxide adduct with respect to 00 parts by weight.
一方表面層は、実施例と同し組成物を用いた。On the other hand, the same composition as in the example was used for the surface layer.
又、実施例と同じ手段で、フィルムを得、耐破袋性を確
認した。In addition, a film was obtained using the same method as in the example, and the bag breakage resistance was confirmed.
比較例２
基層として、固有粘度２−Ｏａ／ ｇ （１３５℃テト
ラリン溶液使用）のアイツタクチイックポリプロピレン
８０（重量）％と低分子量熱可塑性樹脂（実施例１と同
じ物を使用）２０（重量）％からなる混合組成物の１０
０（重Ｍ）部に対し、グリセリンのステアリン酸エステ
ルを０．５（重量）部、アルキルアミンエチレンオキシ
ド付加物１．０（重量）部混合した組成とした。Comparative Example 2 As a base layer, 80% (by weight) of Itsu tactical polypropylene with an intrinsic viscosity of 2-Oa/g (using a tetralin solution at 135°C) and a low molecular weight thermoplastic resin (using the same material as in Example 1) 20% (by weight) A mixed composition consisting of 10%
The composition was prepared by mixing 0 (heavy M) part with 0.5 (weight) part of glycerin stearate and 1.0 (weight) part of an alkylamine ethylene oxide adduct.
一方表面層は、実施例と同じ組成物を用いた。On the other hand, the same composition as in the example was used for the surface layer.
又、実施例と同じ手段でフィルムを得、耐破袋性を確認
した。In addition, a film was obtained by the same method as in the example, and the bag breakage resistance was confirmed.
比較例３
基層トシテ、固有粘度２．０ａ／ ｇ （１３５℃テｔ
・うリン溶液使用）のアイツタクチイックポリプロピレ
ン８０（重量）％とエチレン含有量５．０（重量）％の
プロピレン−エチレン共重合体（メルトインデックス３
．０ｇ／１０分）２０（重量）％からなる混合組成物の
１００（重量）部に対し、グリセリンのステアリン酸エ
ステルを０．５（重量）部、アルキルアミンエチレンオ
キシド付加物１．０（重量）部混合した組成とした。Comparative Example 3 Base layer thickness, intrinsic viscosity 2.0a/g (135℃ temperature
・Aitsu Tactical Polypropylene 80% (wt.) (using urin solution) and propylene-ethylene copolymer (melt index 3) with ethylene content 5.0% (wt.)
．． 0g/10 minutes) 0.5 (weight) part of glycerin stearate ester and 1.0 (weight) part of alkylamine ethylene oxide adduct to 100 (weight) parts of a mixed composition consisting of 20 (weight)%. A mixed composition was obtained.
一方表面層は、実施例と同じ組成物を用いた。On the other hand, the same composition as in the example was used for the surface layer.
又、実施例と同じ手段で、フィルムを得、耐破袋性を確
認した。In addition, a film was obtained using the same method as in the example, and the bag breakage resistance was confirmed.
以下余白
本発明の包装材料は耐破袋性に優れさらに材料を選ぶこ
とにより低温熱接着性、高透明性を有するのであり、特
に−度箱体等に収容体形で包装された、または無包装状
態の集合体を再度密封包装するのに適した包装材料であ
る。The packaging material of the present invention has excellent bag breakage resistance and, depending on the selection of materials, has low-temperature thermal adhesion and high transparency. It is a packaging material suitable for re-sealing and packaging a collection of products.
特許出願人 東洋紡績株式会社 ＝ １２−Patent applicant: Toyobo Co., Ltd. = 12-
Claims (3)
と、プロピレン−α・オレフィン共重合体６０〜２０（
重量）％、及び低分子量熱可塑性樹脂２０〜２（重量）
％を有する混合体により形成された基層の少なくとも片
面が、少なくとも１４５℃以下の融点よりなるオレフィ
ン系重合体により形成された表面層であることを特徴と
する耐破袋性に優れた包装材料。(1) Polypropylene homopolymer 20-78 (weight)%
and propylene-α/olefin copolymer 60-20 (
weight)%, and low molecular weight thermoplastic resin 20-2 (weight)
%, at least one side of the base layer is a surface layer made of an olefin polymer having a melting point of at least 145° C. or lower.
４（重量）％と炭素数が４以上１０以下のα・オレフィ
ンとプロピレンとの共重合体８０〜６（重量）％とを有
する重合体混合物により形成されたものであることを特
徴とする特許請求の範囲第１項記載の耐破袋性に優れた
包装材料。(2) Surface layer is propylene-ethylene copolymer 20-9
4% (by weight) and 80 to 6% (by weight) of a copolymer of α-olefin and propylene having 4 or more and 10 or less carbon atoms. A packaging material with excellent bag breakage resistance according to claim 1.
３成分以上のα・オレフィンから構成された共重合体よ
り形成されたものであることを特徴とする特許請求の範
囲第１項記載の耐破袋性に優れた包装材料。(3) At least one of the olefin polymers in the surface layer is formed from a copolymer composed of three or more α-olefin components. Packaging material with excellent tear resistance.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63009402A JPH01184131A (en) | 1988-01-19 | 1988-01-19 | Packing material having good bag rupture resistance |
| KR1019880011464A KR960002726B1 (en) | 1988-01-19 | 1988-09-05 | Packaging material with excellent burst resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63009402A JPH01184131A (en) | 1988-01-19 | 1988-01-19 | Packing material having good bag rupture resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01184131A true JPH01184131A (en) | 1989-07-21 |
Family
ID=11719427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63009402A Pending JPH01184131A (en) | 1988-01-19 | 1988-01-19 | Packing material having good bag rupture resistance |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH01184131A (en) |
| KR (1) | KR960002726B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003001702A (en) * | 2001-06-26 | 2003-01-08 | Sekisui Chem Co Ltd | Method for producing stretched polyolefin sheet laminate |
| JP2004106441A (en) * | 2002-09-20 | 2004-04-08 | Tohcello Co Ltd | Biaxially oriented polypropylene multilayer film |
| CN1323314C (en) * | 2002-09-17 | 2007-06-27 | 夏普株式会社 | autostereoscopic display |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6072944A (en) * | 1983-09-05 | 1985-04-25 | ヘキスト・アクチエンゲゼルシヤフト | Transparent polyolefin multi-layer film good for seal |
| JPS63132050A (en) * | 1986-11-22 | 1988-06-04 | 東洋紡績株式会社 | Vertical tear laminated film |
-
1988
- 1988-01-19 JP JP63009402A patent/JPH01184131A/en active Pending
- 1988-09-05 KR KR1019880011464A patent/KR960002726B1/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6072944A (en) * | 1983-09-05 | 1985-04-25 | ヘキスト・アクチエンゲゼルシヤフト | Transparent polyolefin multi-layer film good for seal |
| JPS63132050A (en) * | 1986-11-22 | 1988-06-04 | 東洋紡績株式会社 | Vertical tear laminated film |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003001702A (en) * | 2001-06-26 | 2003-01-08 | Sekisui Chem Co Ltd | Method for producing stretched polyolefin sheet laminate |
| CN1323314C (en) * | 2002-09-17 | 2007-06-27 | 夏普株式会社 | autostereoscopic display |
| JP2004106441A (en) * | 2002-09-20 | 2004-04-08 | Tohcello Co Ltd | Biaxially oriented polypropylene multilayer film |
Also Published As
| Publication number | Publication date |
|---|---|
| KR890011697A (en) | 1989-08-22 |
| KR960002726B1 (en) | 1996-02-26 |
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