Mitsubishi Chemical Corporation

The Nippon Synthetic Chemical Industry Co., Ltd.

Shuuichi Fukuyama

Atsushi Ono

Kouji Yamada

Naoki Yamada

Yoshiharu Nagao

Shinichi Tanaka

Tomonori Yoshida

Shinta Miyazumi

Seiichi Honda

The invention provides a saponified ethylene-vinyl ester copolymer pellet which can be inhibited from cracking, chipping and generation of fine powder at the time of transport and is excellent in melt moldability. The saponified ethylene-vinyl ester copolymer pellet of the invention is a pellet which is obtained from a resin composition containing a saponified ethylene-vinyl ester copolymer resin and in which an amount of fine powder after an impact crushing test with ball mill is 400 ppm or less with respect to the saponified ethylene-vinyl ester copolymer pellet.

Saponified ethylene-vinyl ester copolymer pellet and method for producing saponified ethylene-vinyl ester copolymer pellet

The present invention provides a saponified ethylene-vinyl ester copolymer product from which a film having reduced fish eyes can be obtained and a method for producing an ethylene-vinyl ester copolymer that is a precursor thereof. At the time of producing the ethylene-vinyl ester copolymer, as a vinyl ester monomer, the oxygen concentration at storage and/or transportation is adjusted to from 2 to 8 ppm and the oxygen concentration at polymerization is adjusted to less than 2 ppm.

Method for producing ethylene-vinyl ester copolymer, and saponified ethylene-vinyl ester copolymer product

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Osaka, Japan

Shuuichi Fukuyama