Mitsubishi Chemical Corporation

The Nippon Synthetic Chemical Industry Co., Ltd.

Shintaro Usui

Minako Ikeshita

Daichi Nishimura

Ryohei Komuro

An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) a compound containing a conjugated polyene structure; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. The ethylene-vinyl alcohol copolymer composition is less susceptible to coloration and is excellent in heat stability.

Ethylene-vinyl alcohol copolymer composition, pellets, and multilayer structure

An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) a long Periodic Table 4th-period d-block metal compound; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 5 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. The ethylene-vinyl alcohol copolymer composition exhibits improved impact resistance and heat stability (color tone deterioration-suppressing effect and coloration-suppressing effect).

Ethylene-vinyl alcohol copolymer composition, ethylene-vinyl alcohol copolymer composition for melt forming, pellets, and multilayer structure

An object of the present invention is to provide a stand-up pouch for retort which has a high rate of gas barrier property recovery after retort processing and can stably retain high gas barrier properties. The stand-up pouch for retort of the invention comprises a laminate which comprises a base film and, disposed over one surface of the base film, a polyamide resin layer, a saponified ethylene-vinyl ester copolymer layer, and a heat-sealing resin layer, wherein the polyamide resin layer adjoins the saponified ethylene-vinyl ester copolymer layer.

Stand-up pouch for retort

A resin composition contains: (A) an ethylene-vinyl alcohol copolymer having an ethylene structural unit content of 20 to 60 mol %; (B) a saponified ethylene-vinyl acetate copolymer having an ethylene structural unit content of not less than 70 mol %; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the resin composition. The resin composition is resistant to coloration.

Resin composition, melt-forming material, multilayer structure, and agricultural film

A resin composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an olefin polymer; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the resin composition. The resin composition exhibits reduced susceptibility to coloration.

Resin composition, melt-forming material, multilayer structure, and liquid packaging material

An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer including two or more types of ethylene-vinyl alcohol copolymers having different ethylene structural unit contents; and (B) an iron compound; wherein the iron compound (B) is present in an amount of 0.01 to 5 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. The ethylene-vinyl alcohol copolymer composition is substantially free from coloration and excellent in heat stability.

An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an antioxidant; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition. The ethylene-vinyl alcohol copolymer composition is excellent in degradation resistance.

Ethylene-vinyl alcohol copolymer composition, pellets, multilayer structure, and multilayer pipe

An ethylene-vinyl alcohol copolymer composition is substantially free from coloration, and contains: (A) an ethylene-vinyl alcohol copolymer; (B) a polyamide resin; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition.

A resin composition contains: (A) an ethylene-vinyl alcohol copolymer, (B) a polyester resin, and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the resin composition. The resin composition exhibits excellent thermal degradation resistance reduced susceptibility to coloration.

An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an alkali earth metal compound; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition; wherein the ratio (B)/(C) of the weight of the alkali earth metal compound (B) on a metal basis to the weight of the sorbic acid ester (C) is 10 to 30,000. The ethylene-vinyl alcohol copolymer composition is less susceptible to coloration.

Ethylene-vinyl alcohol copolymer composition, melt-forming material, and multilayer structure

An ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an antioxidant; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition; wherein the weight ratio (B)/(C) of the antioxidant (B) to the sorbic acid ester (C) is 500 to 1,000,000. The resulting ethylene-vinyl alcohol copolymer composition is less susceptible to coloration.

Ethylene-vinyl alcohol copolymer composition, melt-forming material, multilayer structure, and multilayer pipe

A melt-formable ethylene-vinyl alcohol copolymer composition and a multilayer structure are substantially free from heat coloration. The melt-formable ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) an alkali earth metal compound; and (C) an iron compound; wherein the iron compound (C) is present in an amount of 0.01 to 20 ppm on a metal basis based on the weight of the ethylene-vinyl alcohol copolymer composition.

Melt-formable ethylene-vinyl alcohol copolymer composition, pellets, and multilayer structure

An ethylene-vinyl alcohol copolymer composition is provided, which is resistant to coloration. The ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer; (B) sorbic acid; and (C) a sorbic acid ester; wherein the sorbic acid ester (C) is present in an amount of 0.00001 to 10 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition; wherein sorbic acid (B) and the sorbic acid ester (C) are present in a weight ratio (B)/(C) of 100 to 100,000.

A thermoformable ethylene-vinyl alcohol copolymer composition contains: (A) an ethylene-vinyl alcohol copolymer comprising two or more ethylene-vinyl alcohol copolymers having different ethylene structural unit contents; and (B) a sorbic acid ester; wherein the sorbic acid ester (B) is present in an amount of 0.00001 to 10 ppm based on the weight of the ethylene-vinyl alcohol copolymer composition. The ethylene-vinyl alcohol copolymer composition is excellent in coloration-suppressing effect.

Growing community of inventors

Tokyo, Japan

Shintaro Usui