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Resin composition, melt-molded article, multi-layered structure, and process for production of resin composition

A technology of resin composition and multi-layer structure, which can be used in transportation and packaging, thin material processing, etc., can solve the problems of poor processing performance and increased viscosity, and achieve the effect of excellent gas barrier performance

Active Publication Date: 2011-10-12
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Accordingly, an object of the present invention is to provide a resin composition which solves the problems of increased viscosity and poor handling properties of the resin composition in the melt-kneading step at the time of molding, and which is Excellent gas barrier performance after hot water treatment, also has excellent handling performance

Method used

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  • Resin composition, melt-molded article, multi-layered structure, and process for production of resin composition
  • Resin composition, melt-molded article, multi-layered structure, and process for production of resin composition
  • Resin composition, melt-molded article, multi-layered structure, and process for production of resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] As the thermoplastic resin (A), 90 parts of EVOH (saponified ethylene-vinyl acetate copolymer: the content of ethylene structural unit is 29mol%, the degree of saponification is 99.7%, the MFR is 4g / 10min (210°C, the load is 2160 g)) were added to a twin-screw extruder with a diameter of 30 mm and two mixing zones. Then, 10 parts of disodium succinate (completely dehydrated product) (EVOH / carboxylate hydrate Partially dehydrated product or completely dehydrated product (B) = 90 / 10) of the material, and melt kneading and extruding the whole material to become a rope, and cut it with a cutting machine to obtain a cylindrical shape of the resin composition of the present invention small ball.

[0139] The set temperature of the extruder: C1 / C2 / C3 / C4 / C5 / C6 / C7 / H / D=200 / 210 / 230 / 230 / 230 / 230 / 230 / 230 / 230°C.

[0140] Then, the pellets were fed into an extruder having a T-die and the die was heated to 230° C. to form three kinds of five-layer multilayer films having a thickness o...

Embodiment 2

[0148] A laminate was obtained in the same manner as in Example 1 except that sodium tartrate (completely dehydrated product) was used instead of disodium succinate as the partially dehydrated product or completely dehydrated product (B) of carboxylate hydrate, and The same evaluation was performed.

Embodiment 3

[0150] A laminate was obtained in the same manner as in Example 1, except that trisodium citrate (completely dehydrated product) was used instead of disodium succinate as the partially dehydrated product or completely dehydrated product (B) of carboxylate hydrate , and made the same evaluation.

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Abstract

Disclosed is a resin composition which exhibits excellent gas barrier properties after the treatment with hot water, does not cause the increase in viscosity thereof in a melt-kneading step employed in a molding process, and has excellent handling properties. The resin composition comprises (A) a thermoplastic resin and (B) a partly dehydrated product or a completely dehydrated product of a hydrate of a carboxylic acid salt.

Description

technical field [0001] The present invention relates to a resin composition. More specifically, the present invention relates to a resin composition containing a thermoplastic resin and a partially dehydrated product or a fully dehydrated product of a carboxylate hydrate, and a multilayer structure having a layer of such a resin composition. Background technique [0002] Generally, when dry distillation (hot water treatment) is performed on a multilayer structure containing a gas barrier resin layer such as saponified ethylene-vinyl ester-based copolymer (hereinafter sometimes referred to as EVOH) or polyamide-based resin, known Yes, the gas barrier performance is lowered because water penetrates into the gas barrier resin layer from the edge of the multilayer structure and the like to break the intermolecular hydrogen bonds. [0003] Hitherto, in order to solve the problem, a technique has been proposed by using a resin combination containing a hydrate-forming salt such as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K5/098
CPCC08K2201/008C08K5/098Y10T428/31928Y10T428/31736Y10T428/31797C08L29/04
Inventor 冈本真治增元博树山田耕司吉田友则
Owner MITSUBISHI CHEM CORP
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