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Resin composition and multilayer structure using same

A technology of resin composition and copolymer, which is applied in the direction of synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of multilayer structure appearance (transparency reduction, roughness, etc.), and achieve the suppression of interface roughness The effect of improving the appearance of the poor appearance and the deterioration of the color tone

Pending Publication Date: 2018-08-31
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this time, depending on the molding conditions, roughness may occur at the lamination interface between the EVOH resin composition layer and its adjacent layers, and as a result, the appearance (transparency) of the multilayer structure may decrease

Method used

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  • Resin composition and multilayer structure using same
  • Resin composition and multilayer structure using same
  • Resin composition and multilayer structure using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0156]

[0157] As EVOH (A), use EVOH (a1) [content of ethylene structural unit 38 mol%, degree of saponification 99.6 mol%, MFR 4.2g / 10min (210°C, load 2160g)] pellets, as carbon number 3-12 Fatty acid metal salt (B), using 0.0017 parts of zinc laurate (b1) in terms of metal relative to 100 parts of EVOH (a1), as a fatty acid metal salt (C) with 13 to 20 carbon atoms, using (a1) 100 parts of zinc stearate (c1) which is 0.0012 parts in terms of metal, used as a fatty acid metal salt (D) having 21 to 29 carbon atoms, 0.0011 parts in terms of metal relative to 100 parts of EVOH (a1) parts of zinc behenate (d1). After dry mixing EVOH (a1) pellets, zinc laurate (b1), zinc stearate (c1) and zinc behenate (d1), use a 20mmφ twin-screw extrusion molding device (L / D=25 ) was melt-kneaded and pelletized again to prepare the resin composition of the present invention.

[0158]

[0159] The resin composition prepared above, linear low-density polyethylene (LLDPE) (manufactured by Ni...

Embodiment 2

[0183] In Example 1, 0.0025 parts of zinc laurate (b1) in terms of metal relative to 100 parts of EVOH (a1) and 0.0025 parts of zinc stearate ( c1) and 0.0025 parts of zinc behenate (d1) in terms of metal relative to 100 parts of EVOH (a1) were carried out in the same manner to produce a resin composition and a multilayer structure. The appearance of the obtained multilayer structure and the color tone stability of the resin composition were evaluated in the same manner as in Example 1.

Embodiment 3

[0185] In Example 1, 0.00333 parts of zinc laurate (b1) in terms of metal relative to 100 parts of EVOH (a1) and 0.00333 parts of zinc stearate ( c1) and 0.00333 parts of zinc behenate (d1) in terms of metal relative to 100 parts of EVOH (a1) were carried out in the same manner to produce a resin composition and a multilayer structure. The appearance of the obtained multilayer structure and the color tone stability of the resin composition were evaluated in the same manner as in Example 1.

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Abstract

Provided is a resin composition containing a saponified ethylene-vinyl ester copolymer (A) and fatty acid metal salts, the resin composition being intended to make it possible to form a multilayer structure having suppressed occurrence of defects of appearance and improved deterioration of color tone during melt molding, wherein the resin composition is characterized in that the fatty acid metal salts are at least two fatty acid metal salts selected from C3-12 fatty acid metal salts (B), C13-20 fatty acid metal salts (C), and C21-29 fatty acid metal salts, and at least one among the fatty acidmetal salts selected from (B), (C), and (D) is a zinc salt.

Description

technical field [0001] The present invention relates to a resin composition obtained by using an ethylene-vinyl ester copolymer saponified product (hereinafter, sometimes abbreviated as "EVOH") and a multilayer structure using it. The resin composition of the multilayer structure which can suppress occurrence of appearance defect and can improve the deterioration of the color tone at the time of melt molding, and the multilayer structure containing the resin composition layer using it can also be formed in the case of the case. Background technique [0002] Many packaging materials used for packaging food and various articles require gas barrier properties, especially oxygen barrier properties. This is to prevent the influence of oxidative deterioration of the contents of the package due to oxygen or the like, and to maintain the freshness of the food for a long time. Therefore, in conventional packaging materials, a gas barrier layer that prevents oxygen permeation is prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04B32B27/28C08K5/098
CPCB32B27/28C08L29/04C08K2201/014C08K5/098B29B9/16B29B9/06B29B9/12C08L23/0861B32B27/306B32B7/12B32B27/08B32B27/34B32B2307/7244
Inventor 小室绫平
Owner MITSUBISHI CHEM CORP
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