Strippable film

A film and copolymer technology, applied in the field of easy-peeling film, can solve the problems of insufficient adhesion and peeling performance

Inactive Publication Date: 2002-07-24
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other films have insufficient adhesion and peel properties for containers made of polyester resins

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Terephthalic acid / ethylene glycol / cyclohexanedimethanol terpolymer (manufactured by Eastman Chemical Co.: PHTG6763) was used as the sealing layer, while ethylene / methyl acrylate copolymer (manufactured by Sumitomo Chemical Co., Ltd., Acryft CG4002, ethylene content 69 wt%) was used as the ethylene copolymer layer adjacent to the sealing layer. In addition, an ethylene / vinyl acetate copolymer (manufactured by Sumitomo Chemical Co., Ltd.: Evatate T3022, ethylene content 93 wt%) is used as a layer between the sealing layer and the ethylene copolymer layer, which plays a role of connecting the two layers (later referred to as the lamination layer). These three resins are co-extruded with a three-layer co-extrusion T-die manufactured by Chugai Tec K.K. so that the thickness of the sealing layer, ethylene copolymer layer, and lamination layer are 5 μm, 10 μm, or 20 μm, respectively, and they become laminated film.

[0040]Thereafter, the exposed surface of the laminated lay...

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Abstract

An object of the present invention is to provide an easily-peelable film which has the better easy peelability required for a lid member for a container comprising a polyester resin and in which a sealing layer does not cause stringing upon peeling. There is provided an easily-peelable film having a sealing layer of the thickness of 1 to 20 mum comprising a polyester resin, and a layer adjacent to the sealing layer and comprising at least one kind of ethylene copolymer selected from the group consisting of an ethylene / unsaturated carboxylic ester copolymer and an ethylene vinyl acetate copolymer.

Description

field of invention [0001] The present invention relates to an easily peelable film suitable for use as a lid member of a packaging container. Background of the invention [0002] In a form of packaging used when sealing the opening of a container, such as a cup, bowl, or saucer, with a lid member comprising a film that protects the contents of the container and that is easily peeled off from the opening . As a cover member satisfying such demands, an easy-peel film is used. Heretofore, various easy-peelable films composed of resin compositions of different resins are known. [0003] As an easy-peelable film for use in containers composed of polyester resins, such as an easy-peelable film is known, which is produced by combining a heat-sealable polyester resin layer, an olefin - A maleic anhydride copolymer layer and a polyolefin layer are successively laminated together, wherein peeling occurs between a heat-sealable polyester resin layer and an olefin / maleic anhydride co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B7/06B32B27/32B32B27/36B65D41/20
CPCB32B27/32B32B27/36B32B7/06Y10T428/26B65D41/20
Inventor 高畑弘明高木康行
Owner SUMITOMO CHEM CO LTD
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