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Heat-shrinkable film

A heat-shrinking, weight-saving technology that can be used in packaging recycling, flexible coverings, and other household appliances to solve problems such as surface contamination

Active Publication Date: 2015-07-29
GUNZE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] On the other hand, when such a heat-shrinkable film is subjected to subsequent processes such as printing or label processing, since the heat-shrinkable film is in contact with a metal guide roller, etc., the surface of the film is cut, and the metal guide roller and the like are filmed. The problem of pollution such as cutting chips

Method used

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  • Heat-shrinkable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] As the cyclic olefin-based resin, 99.85% by weight of APL8008T (ethylene-tetracyclododecene copolymer, glass transition temperature: 70°C, manufactured by Mitsui Chemicals Co., Ltd.) was used, and 0.15% by weight of organic fine particles was added and mixed therein. Cross-linked styrene microparticles (SX, average particle diameter: 3.5 μm, manufactured by Soken Chemical Co., Ltd.).

[0076] These mixtures were melted at a cylinder temperature of 210° C. using a single-screw extruder, extruded from a T-die, cooled and solidified by a roll cooled to 30° C., and an unstretched sheet was produced. The obtained unstretched sheet was stretched 5 times in the TD direction with a tenter stretching machine at a temperature of 90° C. to form a film with a total thickness of 45 μm.

Embodiment 2

[0078] APL6509T (ethylene-tetracyclododecene copolymer, glass transition temperature: 80° C., manufactured by Mitsui Chemicals Co., Ltd.) 45% by weight, APL8008T (ethylene-tetracyclododecene copolymer) as a cyclic olefin-based resin Mitsui Chemicals Co., Ltd.) 14.9% by weight, linear low-density polyethylene SP2320 (Preman Polymer Co., Ltd.) 40% by weight as vinyl resin, cross-linked polymethacrylic acid as organic fine particles Methyl ester fine particles (MBX Series, average particle diameter 5 μm, manufactured by Sekisui Chemical Industry Co., Ltd.) were mixed at 0.10% by weight.

[0079] Except having used these mixtures, it carried out similarly to Example 1, and obtained the film with the total thickness of 30 micrometers.

Embodiment 3

[0081] As the raw material of the front layer and the back layer, 84.85% by weight of 750R (a hydrogenated product of a norbornene-based ring-opening polymer, manufactured by Japan ZEON Co., Ltd.) as a cyclic olefin resin, and a linear resin as a vinyl resin are used. 15% by weight of low-density polyethylene SP1520 (manufactured by Primeman Polymer Co., Ltd.) and 0.15% by weight of cross-linked polyurethane fine particles (manufactured by Negami Kogyo Co., Ltd., Art Pearl C, average particle size: 6 μm) as organic fine particles were mixed mixture.

[0082] As a raw material for the intermediate layer, 80% by weight of linear low-density polyethylene SP2520 (produced by Primeman Polymer Co., Ltd.) and 750R (hydrogenated norbornene-based ring-opening polymer) as a cyclic olefin resin were used. A mixture obtained by mixing 20% ​​by weight of a product manufactured by Japan ZEON Co., Ltd.

[0083] Using another single-screw extruder, the barrel temperature of the front layer a...

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Abstract

The present invention provides a heat-shrinkable film capable of suppressing contamination following a step for printing and the like, while maintaining excellent heat-shrinking properties. The present invention is a heat-shrinkable film having front and rear surface layers which at least contain a cyclic olefin resin in the amount of 55-99.99 wt% and organic fine particles in the amount of 0.01-0.3 wt%.

Description

technical field [0001] The present invention relates to a heat-shrinkable film that has excellent heat shrinkability and can suppress contamination in subsequent processes such as printing. Background technique [0002] In recent years, heat-shrinkable labels printed or the like on heat-shrinkable films made of thermoplastic resins are often attached to containers such as PET bottles and metal cans. [0003] A heat-shrinkable film is required to have various properties such as heat resistance, solvent resistance, and pinhole tear resistance in addition to low-temperature shrinkability. [0004] On the other hand, when such a heat-shrinkable film is subjected to subsequent processes such as printing or label processing, since the heat-shrinkable film is in contact with a metal guide roller, etc., the surface of the film is cut, and the metal guide roller and the like are filmed. The problem of pollution such as cutting chips. [0005] In contrast to this, Patent Document 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00B65D65/40
CPCB65D65/40B32B27/00B32B27/32B32B27/325B32B2264/02B32B2264/0235B32B2307/736B32B2264/025B32B2264/0292B32B25/08B32B25/14B32B27/18B32B27/20B32B2307/306B32B2307/412B32B2307/514B32B2307/558B32B2307/582B32B2307/75B32B2519/00B32B27/08Y10T428/31909Y10T428/31913B32B2250/24B32B2553/00
Inventor 丸市直之尾滨雄树
Owner GUNZE LTD
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