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Polyamide multi layer film

A polyamide-based, multi-layer film technology, applied in lamination, layered products, thin material processing, etc., can solve the problems of film aesthetic damage, polyamide layer oxidation degradation, film whitening, etc.

Active Publication Date: 2006-10-18
GUNZE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when treated in hot water exceeding 85°C, bubbles will be generated in the ethylene-vinyl acetate copolymer saponified layer, so the film will be whitened, causing transparency to deteriorate, hindering the viewing of the contents inside, and the appearance of the film will also be affected. damage
In addition, due to the mixed gas of oxygen and water vapor, the polyamide layer will be oxidized and deteriorated, and there is a possibility of insufficient pinhole resistance, interlayer strength, and lamination strength. purpose of processing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] By blending 6-nylon (87 parts by weight), modified ethylene-vinyl acetate copolymer (2.5 parts by weight), ethylene-methacrylic acid copolymer ionomer (0.5 parts by weight), and 3,9 as an antioxidant Bis[2-{3-(3-tert-butyl4-hydroxy-5-methylphenyl)propionyloxy}-1,1-dimethylethyl]-2,4,8,10-tetra Oxyspiro[5,5]undecane (0.0060 parts by weight) and 6-[3-(3-tert-butyl 4-hydroxy-5-methylphenyl)propoxy]-2,4,8,10 -tetra-tert-butylbenzo[d,f][1,3,2]dioxaphosphopine (0.010 parts by weight), and aromatic nylon (10 parts by weight), to produce the polyamide constituting the present invention layer resin composition. Alternatively, a resin composition having the same composition as above can also be used.

[0064] In addition, as the resin composition constituting the EVOH layer, an EVOH composite resin (SG464B, manufactured by Nippon Synthetic Chemical Co., Ltd.) containing a polyamide resin, an alcohol compound, and EVOH was used.

[0065] The resin constituting each layer is arr...

Embodiment 2

[0068] By the same treatment as in Example 1, a three-layer polyamide-based multilayer film was obtained. The thickness thereof is 6.0 μm / 8.0 μm / 6.0 μm in the order of polyamide layer / EVOH layer / polyamide layer.

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Abstract

The present invention relates to a polyamide-based multilayer film containing at least one saponified ethylene-vinyl acetate copolymer later and at least one polyamide layer; and provides a polyamide-based multilayer film having excellent resistance to boiling water and retort treatment, and a production method therefor.

Description

technical field [0001] The present invention relates to a polyamide-based multilayer film having an ethylene-vinyl acetate copolymer saponified layer and a polyamide layer and a method for producing the same. Background technique [0002] Polyamide-based multilayer films with an ethylene-vinyl acetate copolymer saponified layer as a gas barrier layer are widely recognized as films for packaging food, pharmaceuticals, etc. as films with excellent mechanical strength, pinhole resistance, and gas barrier properties. [0003] However, when treated in hot water exceeding 85°C, bubbles will be generated in the ethylene-vinyl acetate copolymer saponified layer, so the film will be whitened, causing transparency to deteriorate, hindering the viewing of the contents inside, and the appearance of the film will also be affected. damage. In addition, due to the mixed gas of oxygen and water vapor, the polyamide layer will be oxidized and deteriorated, and there is a possibility of insu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/28B32B27/08B32B27/34
CPCB32B27/08B32B27/34Y10T428/31721B32B27/30B32B27/18B32B27/306B32B2038/0028B32B2250/24B32B2307/306B32B2439/70
Inventor 丹羽治丰永武彦
Owner GUNZE LTD
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