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Gas barrier film

A gas barrier and substrate film technology, which is applied to flexible coverings, devices for coating liquid on the surface, containers, etc., can solve the problems of decreased adhesion between the evaporated inorganic oxide layer and the gas barrier layer, and productivity. Eliminates problems such as laminate film layer peeling, and achieves excellent water vapor barrier properties, excellent production adaptability, and a wide range of applications

Inactive Publication Date: 2009-04-29
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the technologies in Patent Documents 1 and 2 are all cross-linked by using ester bonds to improve the barrier properties under high humidity. In order to fully carry out the esterification and improve the gas barrier properties of the film, these methods need to be reacted under high temperature heating , which is problematic in terms of productive
[0013] In addition, in the techniques of Patent Documents 3 and 4, when a film having a laminated structure is subjected to hot water sterilization treatment such as retort treatment, the adhesion force between the deposited inorganic oxide layer and the gas barrier layer is greatly reduced.
That is, practically, when such a film is used, there is a problem that delamination between layers of the laminated film occurs during hot water sterilization such as retort treatment on a package containing food.
In addition, the gas barrier layer has a strong adhesive force (stickiness), so there is also a problem that the product roll curled in the processing process is blocked, making it difficult to produce.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0095] 10.0 parts, 32.1 parts of M-93 (curing agent), 32.1 parts of M-93 (curing agent) and 10.0 parts of polyepoxy resin coating agent Macshi-bu M-100 (main agent) produced by Mitsubishi Gas Chemical Co., Ltd. containing the skeleton structure shown in the above formula (1) 99.2 parts and 12.2 parts of ethyl acetate were stirred for 30 minutes to prepare a gas barrier coating liquid 1 having a solid content concentration of 20% by weight.

[0096] As a substrate film provided with a vapor-deposited layer, a biaxially stretched polyethylene terephthalate film was prepared on one side of a biaxially stretched polyethylene terephthalate film with an aluminum oxide layer by vapor deposition. ) 1011HG. The gas barrier coating liquid 1 was coated on the vapor deposition layer using a wire bar, and dried at 140° C. for 30 seconds to form a polyepoxide having a thickness of 0.8 μm and having a skeleton structure represented by the above formula (1). It is a gas barrier layer formed ...

Embodiment 2

[0103] Weigh 10.0 parts of polyester resin coating agent MET No.720NT manufactured by Dainippon Inki Chemical Industry Co., Ltd., 0.1 part of curing agent KO-55 manufactured by Dainippon Inki Chemical Industry Co., Ltd., and 20.5 parts of ethyl acetate The ester was stirred for 30 minutes to prepare a coating liquid 2 having a solid content concentration of 10% by weight. A coated film 2 and a laminated film 2 were obtained in the same manner as in Example 1, except that the coating liquid 2 prepared as above was used instead of the coating liquid 1 to provide a coating layer made of polyester resin.

Embodiment 3

[0105] For 10.0 parts of polyacrylic resin coating agent LG-VM coating agent B manufactured by Tokyo Inki Co., Ltd., 1.0 parts of curing agent LG-VM curing agent D manufactured by Tokyo Inki Co., Ltd., and 5.0 parts of ethyl acetate Stirring was carried out for 30 minutes to prepare a coating liquid 3 having a solid content concentration of 9.4% by weight. The coated film 3 and the laminated film 3 were obtained in the same manner as in Example 1, except that the coated liquid 3 prepared as described above was used instead of the coated liquid 1 and an overcoat layer made of polyacrylic resin was provided.

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Abstract

Disclosed is a gas barrier film exhibiting excellent oxygen and water vapor blocking performance, while having resistance to heat sterilization treatments such as a boiling / retorting treatment. A gas barrier film as a first embodiment of the present invention is characterized by having a structure wherein a deposition layer of an inorganic compound is formed on one side of a base film, a gas barrier layer of a polyepoxy cured product having a skeleton represented by the formula (1) below is formed on the deposition layer, and an overcoat layer made of at least one resin selected from the group consisting of polyepoxy resins, polyester resins and polyacrylic resins is formed on the gas barrier layer. A gas barrier film as a second embodiment of the present invention is characterized by having a structure wherein a deposition layer of an inorganic compound is formed on one side of a base film, a gas barrier layer of a polyurethane resin is formed on the deposition layer, and an overcoat layer made of a polyester resin and / or a polyacrylic resin is formed on the gas barrier layer.

Description

technical field [0001] The present invention relates to a film having excellent gas barrier properties, which has excellent oxygen barrier properties and water vapor barrier properties, and is also resistant to thermal sterilization treatments such as retort treatment, and is particularly suitable for retort applications. membrane. Background technique [0002] Gas barrier films and packaging materials using the gas barrier films are well known. [0003] Aluminum foil is the material with the most excellent oxygen barrier properties, but aluminum foil alone has weak pinhole resistance, so it cannot be used alone except for special applications, and is basically used as an intermediate layer of laminated films. Such a laminated film has very excellent gas barrier properties, but has disadvantages such as being opaque, making it impossible to see the contents, and making it difficult to judge whether or not it has been reliably heat-sealed. [0004] In addition, thermoplasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/38B05D7/24B32B9/00B32B27/40B65D65/40B65D81/24C08J7/043C08J7/048C08J7/052
CPCB05D7/52C08J7/045B05D2350/63C08J2463/00Y10T428/31511Y10T428/31515C08J7/0423C08J7/052C08J7/048C08J7/043B05D7/24B32B27/38B32B27/40B65D65/40
Inventor 荒井崇立石康广田草人奥津涉寺西正芳
Owner TORAY IND INC
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