Gas barrier laminate film

Abstract

A gas barrier laminate film comprising a resin substrate on which a gas barrier vapor deposition layer, and a gas barrier covering layer are laminated, wherein the gas barrier covering layer is formed through the coating, and drying of a coating liquid comprising Si(OR<1>)4 or the hydrolyzates thereof, (R<2>Si(OR<3>)3)n or the hydrolyzates thereof (wherein R<1> and R<3> are individually CH3, C2H5 or C2H4OCH3, and R<2> is an organic functional group) and a water-soluble polymer having a hydroxyl group. <IMAGE>

Description

technical field [0001] The present invention relates to a gas-barrier laminated film, which can be used as a packaging material for food and non-food fields such as medicines and electronic articles, in particular, to a gas-barrier laminated film, which has Excellent gas barrier properties can prevent oxygen or water vapor in the atmosphere from entering the package, thereby suppressing deterioration or denaturation of the contents of the package. Background technique [0002] In order to suppress the denaturation of the contents of the package and thus maintain the function and performance of the contents, packaging materials for packaging food and non-food items such as medicines and electronic articles are required to prevent the passage of gases such as oxygen, water vapor and other types of gases through the packaging material Penetrates and denatures the contents of the package. Therefore, packaging materials are required to have sufficient gas b...

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Problems solved by technology

Therefore, the gas barrier property of the covering layer is easily degraded under severe conditions such as boiling or distillation treatment

[0005] On the other hand, in the case of metal foil and metallized film, although they have excellent gas barrier properties, they are accompanied by some problems: the contents of the package cannot be visually recognized through the packaging material, and the contents of the package cannot be detected. Use metal detectors and require non-combustible materials when disposing of them

However, since the second layer of the gas barrier packaging material is formed by the hydrogen bond between the metal alkoxide hydrolyzate and the water-soluble polymer having hydroxyl groups, when the gas barrier packaging material is used as a When the packaging material is used, the cover layer will swell, causing the problem of lowered gas barrier properties

Even if the reduction in gas barrier properties is small, this packaging material is not suitable for packaging materials that require very high gas barrier properties, such as in the case of primary packaging for infusion solutions

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