Gas barrier film

A gas-barrier and film technology, which is applied in the direction of flexible coverings, types of packaging items, special packaging items, etc., and can solve the problems of inability to confirm the contents, decreased gas-barrier properties, and high gas-barrier properties.

Active Publication Date: 2014-11-05
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, although metal foil or metal vapor-deposited film is excellent in gas barrier properties, it has many problems: it is opaque, so the content cannot be confirmed; due to poor stretchability, cracks occur at a few percent elongation, and gas barrier properties decline; it needs to be treated as non-combustible when it is discarded after use, etc.
However, as the inorganic layered minerals are regularly distributed and arranged, the cohesive force of the resin film or the adhesive force of the resin film to the substrate decreases, so it is extremely difficult to achieve both high gas barrier and sufficient adhesive strength as a packaging material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112]Water-swellable synthetic mica (SOMASIF MEB-3 produced by Co-op Chemical Co., Ltd.) was used as the inorganic layered mineral, a 5% aqueous solution of polyvinyl alcohol resin (Poval PVA-124 produced by Kuraray Co., Ltd.) was used as the water-soluble resin, and a water-insoluble The polyurethane dispersion liquid (TAKELAC WPB-341 manufactured by Mitsui Chemicals Co., Ltd.) was used as the resin, and the mixing ratio of each solid content was 20 / 20 / 60 by mass ratio, and heated and mixed at 80°C. Afterwards, it was cooled to room temperature, and the above-mentioned water-swellable synthetic mica, polyvinyl alcohol resin, polyvinyl alcohol resin, The mixture of the polyurethane dispersion was diluted, and immediately before coating, 15% by mass of a curing agent (water-based polyisocyanate TAKELACWD-725 manufactured by Mitsui Chemicals Co., Ltd.) was added to the solid content of the polyurethane dispersion to prepare Example 1. water-based coatings.

[0113] Use a gravu...

Embodiment 2

[0115] Water-swellable synthetic mica (SOMASIF MEB-3 produced by Co-op Chemical Co., Ltd.) was used as the inorganic layered mineral, a 5% aqueous solution of polyvinyl alcohol resin (Poval PVA-105 produced by Kuraray Co., Ltd.) was used as the water-soluble resin, and a water-insoluble The polyurethane dispersion liquid (TAKELAC WPB-341 manufactured by Mitsui Chemicals Co., Ltd.) was used as the resin, and the mixing ratio of each solid content was 20 / 10 / 70 by mass ratio, and heated and mixed at 80°C. Afterwards, it was cooled to room temperature, and the above-mentioned water-swellable synthetic mica, polyvinyl alcohol resin and The mixture of polyurethane dispersions is diluted. The water-based coating agent of Example 2 was prepared by adding a curing agent (aqueous polyisocyanate TAKELAC WD-725 manufactured by Mitsui Chemicals, Ltd.) at 15% by mass relative to the solid content of the polyurethane dispersion immediately before coating.

[0116] Use a gravure coater to ma...

Embodiment 3

[0118] A 5% aqueous dispersion of montmorillonite (Kunipia-F manufactured by Kunimine Industry Co., Ltd.) was used as an inorganic layered mineral, a 2% aqueous solution of carboxymethylcellulose sodium salt was used as a water-soluble resin, and a polyurethane dispersion was used as a water-insoluble resin. (TAKELAC WPB-341 manufactured by Mitsui Chemicals Co., Ltd.), heating and mixing were performed at 80° C. with each solid content compounding ratio being 25 / 25 / 50 by mass ratio. Afterwards, cool to room temperature, according to the mode that 10 mass % in the solvent is isopropanol, solid component concentration reaches 8 mass %, utilize ion-exchanged water and isopropanol to above-mentioned montmorillonite, carboxymethyl cellulose sodium salt and The mixture of the polyurethane dispersion liquid was diluted, and immediately before coating, a curing agent (water-based polyisocyanate TAKELAC WD-725 manufactured by Mitsui Chemicals Co., Ltd.) was added at 15% by mass relative...

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Abstract

This gas barrier film is provided with: a substrate film comprising a plastic material; and a gas barrier coating film that is formed on one or both surfaces of the substrate film and that comprises an inorganic lamellar mineral and at least one resin component interposed between the layers of the inorganic lamellar mineral. When the x-ray diffraction spectrum of the gas barrier coating film is measured using the Cu Kalpha line in an atmosphere at 25°C and 65% RH, the x-ray diffraction spectrum exhibits a first peak top and a second peak top corresponding to the inter-layer distance of the inorganic lamellar mineral, the first peak top is derived from the inter-layer distance of a thin film consisting of the inorganic lamellar mineral, and the second peak top is derived from the inter-layer distance of the inorganic lamellar mineral having opened by means of the interposition of the resin component between the layers of the inorganic lamellar mineral, and is present at a lower position than the first peak top position in the 2theta axis.

Description

technical field [0001] The invention relates to a barrier used in the packaging field of dry food, snacks, bread, delicacies and other foods that hate moisture or oxygen, as well as medical products such as disposable baby warmers, tablets, powder medicine or paste dressings, patches, etc. Gas film. More specifically, it relates to a gas-barrier film used in the field of packaging requiring high gas-barrier properties and transparency for recognizable contents. [0002] This application claims priority based on Japanese Patent Application No. 2012-041252 for which it applied in Japan on February 28, 2012, and uses the content here. Background technique [0003] For packaging materials used in the packaging of food or pharmaceuticals, etc., in order to prevent deterioration or spoilage of the contents, maintain the functions or properties of food or pharmaceuticals, etc., block water vapor, oxygen, and other gases that degrade the contents The ingress properties (gas barrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/18C08J7/043C08J7/048C08J7/052
CPCB32B27/18B32B27/32B32B2255/10B32B2255/20B32B2255/26B32B2307/7242B32B2439/70B32B2439/80C08J2323/12B32B27/08B32B27/308B32B27/36B32B2255/28B32B2307/31B32B2307/7166C08J2400/14C08J2429/04C08J2475/04Y10T428/251Y10T428/2826Y10T428/31551C08J7/0427C08J7/048C08J7/052C08J7/043B65D65/40
Inventor 神永纯一松本阳美星沙耶佳
Owner TOPPAN PRINTING CO LTD
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