Gas-barrier material, process for producing the same, and gas-barrier packaging material

A technology of gas barrier materials and packaging materials, applied in the field of packaging materials, can solve the problems of poor adhesion of resin layers, poor flexibility of evaporated films, and large humidity dependence, and achieve excellent flexibility, excellent gas barrier properties, and provide durability steaming effect

Inactive Publication Date: 2008-12-03
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from the perspective of environmental problems, the use of polyvinylidene chloride and polyacrylonitrile tends to be restricted, and ethylene vinyl alcohol copolymers have problems such as large humidity dependence of gas barrier properties and lower gas barrier properties under high humidity conditions.
[0003] As a method of imparting gas barrier properties to packaging materials, it is known to vapor-deposit inorganic films on the surface of the substrate, but the cost of these films is very high, and the flexibility of the vapor-deposited film is poor, and the substrate or other resin layer problems such as poor adhesion of

Method used

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  • Gas-barrier material, process for producing the same, and gas-barrier packaging material
  • Gas-barrier material, process for producing the same, and gas-barrier packaging material
  • Gas-barrier material, process for producing the same, and gas-barrier packaging material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] The polycarboxylic acid polymer (A) used polyacrylic acid (manufactured by Wako Pure Chemical Industries, 25% aqueous solution), dried under reduced pressure, and immediately dissolved in ethanol to obtain a (ethanol / water) solution with a solid content of 18.7%. (I). The solvent composition is ethanol / water=80 / 1.3 by weight ratio. On the other hand, compound (B) was dissolved in a mixed solvent of ethanol / water (=16 / 3, weight ratio) using 2,2'-bis(2-oxazoline) (manufactured by Tokyo Chemical Industry Co., Ltd.) to obtain a solid Components 5% (ethanol / water) solution (II). The solutions (I) and (II) were mixed so that the compound (B) was 5% by weight relative to the polycarboxylic acid polymer (A), and then prepared so that the solid content was 10%, and the weight ratio of the mixed solvent was ethanol / water =85 / 15, after that, it was stirred sufficiently to obtain a coating liquid.

[0110] The above coating solution was applied to a biaxially stretched polyethyl...

Embodiment 2

[0112] In Example 1, solutions (I) and (II) were mixed so that the compound (B) was 10% by weight relative to the polycarboxylic acid polymer (A), and the method was the same as in Example 1. A laminate is obtained.

Embodiment 3

[0114] In Example 1, solutions (I) and (II) were mixed so that the compound (B) was 20% by weight relative to the polycarboxylic acid polymer (A), and in the same manner as in Example 1 A laminate is obtained.

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Abstract

A gas-barrier material characterized by being made from a polycarboxylic acid polymer (A) and a compound (B) having two ring structures (b) each including the oxygen atom of an ether bond formed with a carbon atom forming a double bond with a nitrogen atom, and by having a crosslinked structure formed by reacting carboxy groups of the polycarboxylic acid polymer (A) with the ring structures (b) of the compound (B). Due to the constitution, the gas-barrier material is excellent in gas-barrier properties, retortion resistance, and flexibility. A coating film can be cured at a low temperature in a short time. The gas-barrier material is excellent also in productivity.

Description

technical field [0001] The present invention relates to a gas barrier material formed by using a cross-linking agent for a polycarboxylic acid polymer, and the cross-linking agent is formed of a compound having a specific functional group. A steamable and flexible gas-barrier material, a manufacturing method thereof, and a packaging material made of the gas-barrier material. Background technique [0002] Conventionally, various substances have been used as gas barrier resins, and in particular, polyvinylidene chloride, polyacrylonitrile, ethylene vinyl alcohol copolymer, and the like are well known as gas barrier resins. However, from the perspective of environmental problems, the use of polyvinylidene chloride and polyacrylonitrile tends to be restricted, and ethylene vinyl alcohol copolymers have problems such as large humidity dependence of gas barrier properties and lower gas barrier properties under high humidity conditions. . [0003] As a method of imparting gas bar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F8/30C08F8/44C08F20/06B32B27/32B65D65/40
CPCC08F2810/20Y10T428/31573C08F8/00C08F8/14Y10T428/31938C08F8/30B32B27/08C08F8/44C08F120/06C08F20/06B65D65/40
Inventor 小赋雄介佐佐木洋远藤亚纪
Owner TOYO SEIKAN KAISHA LTD
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