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Multilayer heat-shrinkable film and containers fitted with labels made from the film through heat shrinkage

A technology of heat shrinkage and film application in the direction of instruments, layered products, identification devices, etc., which can solve surface heat resistance, adhesion resistance, poor lubricity, film adhesion, inner surface heat resistance, adhesion resistance and poor lubricity, etc. question

Active Publication Date: 2006-07-12
GUNZE LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In addition, recently, the use of heaters in supermarkets, convenience stores, etc., and the use of hot food vending machines in vending machines have been rapidly expanded. Poor properties and lubricity, so there is trouble of sticking between films (between containers), and, due to poor heat resistance, blocking resistance, and lubricity of the inner surface, there is trouble of sticking between films and containers, so there is Disadvantages that cannot be used for the above purposes

Method used

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  • Multilayer heat-shrinkable film and containers fitted with labels made from the film through heat shrinkage
  • Multilayer heat-shrinkable film and containers fitted with labels made from the film through heat shrinkage
  • Multilayer heat-shrinkable film and containers fitted with labels made from the film through heat shrinkage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] The resin composition for forming the inner and outer film layers (68% by mass of a random copolymer of ethylene and cyclic olefin (APEL8009T, manufactured by Mitsui Chemicals Co., Ltd.), 31% by mass of a pass metal containing 1-hexene as a copolymerization component) was prepared. The linear low density polyethylene of the metallocene catalyst system formed by the polymerization of the locene catalyst (Mitsui Chemicals Co., Ltd.'s EOPOLY-SP2320), 1 mass% of EOPOLY-SP2320 as the base resin and containing 10 mass% of synthetic silica. master batch), and a resin composition for forming an intermediate film layer (72% by mass of a propylene-ethylene random copolymer containing a petroleum resin (F239V manufactured by Mitsui Chemicals Co., Ltd.), 8% by mass of a low-crystalline ethylene- 1-Butene copolymer (Tefuma-A4085 manufactured by Mitsui Chemicals Co., Ltd.) and 20 mass % random copolymer of ethylene and cyclic olefin (APEL8009T manufactured by Mitsui Chemicals Co., Ltd...

Embodiment 2

[0096] A multilayer heat-shrinkable film was obtained in the same manner as in Example 1, except that 65 mass % of F239V, 7 mass % of Tefuma-A4085, and 28 mass % of APEL8009T were used as the intermediate layer resin composition. The transverse thermal shrinkage of the film (10 seconds in warm water at 90°C and 10 seconds in boiling water), longitudinal tear propagation strength, turbidity, gloss, transverse shrinkage stress in warm water at 90°C, and stiffness (hardness) are shown in the table. 1 shown.

Embodiment 3

[0102]Except using a mixture of 45 mass % of F239V, 5 mass % of Tefuma-A4085 and 50 mass % of the film pulverized product obtained in Comparative Example 2 (the ratio of APEL 8009T in the intermediate layer is about 12 mass %) as the intermediate layer Except for the resin composition, a multilayer heat-shrinkable film was obtained in the same manner as in Example 1. The transverse thermal shrinkage of the film (10 seconds in warm water at 90°C and 10 seconds in boiling water), longitudinal tear propagation strength, turbidity, gloss, transverse shrinkage stress in warm water at 90°C, and stiffness (hardness) are shown in the table. 1 shown.

[0103] Example 1

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Abstract

A multilayer heat-shrinkable film which is constituted of at least three layers comprising two surface layers made of a resin composition comprising 55 to 95% by mass of a cyclic olefin resin and 45 to 5% by mass of linear low-density polyethylene and an interlayer made of a resin composition comprising 95 to 55 % by mass of a propylene / alpha-olefin random copolymer or a resin composition containing this copolymer as the main component and 5 to 45% by mass of a cyclic olefin resin and which exhibits a crosswise heat shrinkage of 50% or above when immersed in water at 90 DEG C for 10 seconds and a lengthwise tear propagation strength of 800 to 350mN. This multiplayer heat-shrinkable film has a low specific gravity, does not cause on heat shrinkage whitening due to the staining with fingerprints, and is excellent in heat-shrinkage characteristics and perforation characteristics, thus being suitable for labels.

Description

technical field [0001] The present invention relates to a shrinkable film containing a cyclic olefin-based resin, and more particularly, the present invention relates to a film that is most suitable for use with a small specific gravity, does not cause whitening caused by fingerprints during thermal shrinkage, and maintains required haze (transparent) A multi-layer heat-shrinkable film containing a cyclic olefin-based resin for a label with excellent thermal shrinkage properties and perforation properties while maintaining the level of properties), gloss, impact strength, shrinkage stress, stiffness (hardness), etc. Background technique [0002] Green tea, sports drinks, juices, beverages, etc. are often sold in containers such as bottles or PET bottles. In this case, in order to distinguish from other products or to improve the visibility of the products, a printed heat-shrinkable label is usually attached to the outer side of the container. As the material of the label, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00G09F3/04
Inventor 若井睦巳奥田智久森川阳圆尾正晴丸市直之
Owner GUNZE LTD
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