Laminated Body With Sealant Film

A laminated body and sealing film technology, applied in coatings, layered products, household appliances, etc., can solve problems such as high humidity dependence, reduced oxygen or water vapor barrier properties, and inability to cope with hot water sterilization

Inactive Publication Date: 2017-02-22
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the coextruded film using ethylene-vinyl alcohol as the middle layer has a high humidity dependence, and there are problems in that oxygen or water vapor barrier properties are reduced at high humidity, or it cannot cope with hot water sterilization such as boiling and steaming.
On the other hand, a coextruded film using polyvinylidene chloride as an intermediate layer has hot water resistance compared with ethylene-vinyl alcohol, but has the possibility of producing secondary particles during incineration of the film. environmental issues

Method used

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  • Laminated Body With Sealant Film
  • Laminated Body With Sealant Film
  • Laminated Body With Sealant Film

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0229] (Production example 1) Resin (b1): Production example of THEI (OPAEG) 3

[0230] Add 1136.5 parts of phthalic anhydride, 495.3 parts of ethylene glycol, and tris(2-hydroxyethyl)isocyanuric acid to a polyester reaction vessel equipped with a stirrer, nitrogen introduction tube, rectification tube, moisture separator, etc. 668.1 parts of ester and tetraisopropyl titanate in an amount equivalent to 100 ppm relative to the total amount of polycarboxylic acid and polyhydric alcohol. Slowly heat it so that the upper part of the rectification tube does not exceed 100°C and keep the internal temperature at 220°C. When the acid value reaches 1 mgKOH / g or less, the esterification reaction is terminated, and a polyester polyol with a number average molecular weight of 860, a hydroxyl value of 195.4 mgKOH / g, and an acid value of 0.9 mgKOH / g is obtained. The number of design functional groups per molecule of the resin (A) was 3 hydroxyl groups and 0 carboxyl groups, and the solubility...

manufacture example 2

[0231] (Production example 2) Resin (b1): Production example of GLY(OPAEG)+MA

[0232] Add 1316.8 parts of phthalic anhydride, 573.9 parts of ethylene glycol, and 409.3 parts of glycerol to a polyester reaction vessel equipped with a stirrer, nitrogen introduction tube, rectification tube, moisture separator, etc. The total amount of is equivalent to 100 ppm of tetraisopropyl titanate, which is slowly heated so that the temperature of the upper part of the rectifying tube does not exceed 100°C, and the internal temperature is maintained at 220°C. When the acid value reaches 1 mgKOH / g or less, the esterification reaction is terminated, and a polyester polyol with a hydroxyl value of 339.9 mgKOH / g is obtained. Then, the temperature was lowered to 120°C, 421.8 parts of maleic anhydride was added thereto, and the temperature was maintained at 120°C. When the acid value reaches approximately half of the acid value calculated from the added amount of maleic anhydride, the esterificati...

manufacture example 3

[0233] (Manufacturing Example 3) Resin (b1): Manufacturing method of EGOPA (0.9K)

[0234] Add 148.1 parts of phthalic anhydride, 84.2 parts of ethylene glycol, and 0.03 parts of tetraisopropyl titanate to a polyester reaction vessel equipped with a stirrer, nitrogen introduction tube, rectification tube, moisture separator, etc. The upper part of the distillation tube is slowly heated so that the temperature does not exceed 100°C, and the internal temperature is maintained at 205°C. When the acid value reaches 1 mgKOH / g or less, the esterification reaction is terminated, and a polyester polyol with a number average molecular weight of 900, a hydroxyl value of 126.2 mgKOH / g, and an acid value of 0.36 mgKOH / g is obtained. The number of designed functional groups per molecule of the resin (A) was 2 hydroxyl groups and 0 carboxyl groups, and the solubility of the resin (A) was judged as ○.

[0235] (Preparation of Adhesive A)

[0236] Mix the resin, inorganic compound, and solvent des...

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Abstract

The present invention addresses the problem of providing a laminated body that can be used as a packing material or the like mainly for food products and that uses a sealant layer which has a prescribed adhesive layer which exhibits barrier properties against oxygen or steam in order to exhibit outstanding barrier properties against oxygen or steam. This problem is solved by the provision of a laminated body (A2) which uses a laminated body (A1) as a sealant film and which has a layered structure of a substrate film, an adhesive, and a laminated body (A1), wherein the laminated body (A2) is characterized in that the laminated body (A1) has a layered structure of a film, an adhesive with oxygen or steam barrier properties (B), and a sealant film.

Description

Technical field [0001] The present invention relates to a laminate having a sealing film having oxygen or water vapor barrier properties. Background technique [0002] As a food packaging material, a material obtained by laminating multiple layers of various plastic films, metals, glass vapor-deposited films, metal foils, and the like to form a composite film is used. As a method of bonding these various plastic films, metals, glass vapor-deposited films, metal foils, etc., there is a technique called dry lamination, in which an adhesive is applied to one material surface and then evaporated The solvent is removed by drying, and other materials are laminated while heating and pressure bonding. This technology can freely attach arbitrary films to each other, and can obtain a composite film having performance corresponding to the purpose. Therefore, it is widely used in the production of food packaging materials that require high performance. [0003] Among these composite films, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00B32B27/40
CPCB32B27/00B32B27/16B32B27/304B32B27/306B32B27/308B32B2264/10B32B2264/104B32B2307/31B32B2307/518B32B7/12B32B27/08B32B27/32B32B27/34B32B27/36B32B2250/03B32B2250/24B32B2255/10B32B2255/26B32B2307/7244B32B2307/7246B32B2405/00B32B2439/70B65D65/40
Inventor 下口睦弘大久保智雄
Owner DIC CORP
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