Liquid packaging composite film and manufacturing method thereof

A production method and composite film technology, applied in packaging, devices for coating liquid on the surface, wrapping paper, etc., can solve the problems of low coating firmness and poor barrier properties, and achieve high composite firmness and barrier properties. Oxygen barrier , the effect of long-term use

Active Publication Date: 2010-02-03
ZHEJIANG BILI PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the problems of poor barrier properties and low coating firmness of existing polyethylene films

Method used

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with embodiment.

[0010] The liquid packaging composite film of the present invention includes a film layer and a coating as a substrate, and an adhesive layer between the film layer and the coating, and is characterized in that the coating is a polyvinylidene chloride copolymer layer or a polyvinylidene chloride copolymer layer. Vinyl alcohol layer; the composition of the polyvinylidene chloride copolymer layer is polyvinylidene chloride copolymer, and the polyvinylidene chloride copolymer is composed of polyvinylidene chloride and acrylic acid; the composition of the polyvinyl alcohol layer is polyvinylidene chloride copolymer Vinyl alcohol dispersion system, polyvinyl alcohol dispersion system is composed of polyvinyl alcohol, amino resin, glutaraldehyde, silicon dioxide and water.

[0011] In polyvinylidene chloride copolymer, the weight percentage between polyvinylidene chloride and acrylic acid ...

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Abstract

The invention relates to a liquid packaging composite film which comprises a film layer, a coating layer and a bonding layer, wherein the film layer and the coating layer are used as base materials; the bonding layer is arranged between the film layer and the coating layer; the coating layer is a polyvinylidene chloride copolymer layer or a polyvinyl alcohol layer; the polyvinylidene chloride copolymer layer comprises polyvinylidene chloride copolymers; and the polyvinyl alcohol layer comprises a polyvinyl alcohol dispersion system. The manufacturing method of the liquid packaging composite film comprises the following steps: treating the base material film by corona discharge; coating the bonding layer on the base material film which is treated by corona discharge, and drying and coolingthe bonding layer; coating the polyvinylidene chloride copolymer dispersion system or the polyvinyl alcohol dispersed system on the base material film which is coated with the bonding layer; and then,drying and cooling the coating layer. The liquid packaging composite film has the characteristics of good barrier property, high firmness of the coating layer and long service life.

Description

technical field [0001] The invention relates to a composite film for liquid packaging and a manufacturing method thereof. Background technique [0002] Existing liquid packaging composite films are usually polyethylene films, which have poor barrier properties. For this reason, it is also useful to apply a coating on it to improve the barrier property, but the composition of the existing coating has a limited effect on improving the barrier property, and the bonding strength between the coating and the film layer is relatively low. Contents of the invention [0003] The object of the present invention is to provide a composite film for liquid packaging and a manufacturing method thereof. [0004] The invention aims to solve the problems of poor barrier property and low coating fastness of existing polyethylene films. [0005] For realizing the purpose of the present invention, technical scheme of the present invention is: [0006] The liquid packaging composite film of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/42B32B27/08C09D127/08C09D129/04C09J175/04B05D7/24B05D3/14B05D3/02B41M7/02
Inventor 王彤
Owner ZHEJIANG BILI PACKAGING
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