Toyo Seikan Group Holdings, Ltd.

Toyo Seikan Co., Ltd.

Azusa Otsuki

Takayuki Ishihara

Yuuki Tashiro

Toshiki Yamada

Seishi Yoshikawa

Kenji Ichikawa

Koki Shibata

Kousuke Ueda

Yuusuke Itou

Kouki Shibata

Tashiro Yuuki

Toshihiro Tanabe

Masashi Atsugi

Gou Saitou

A gas-barrier multilayered container having (i) a layer of a propylene type polymer which chiefly includes a homopolypropylene having an isotactic index of not less than 93%, and (ii) a layer of an ethylene-vinyl alcohol copolymer having not less than two crystal melting peak temperatures. Also disclosed is a lustrous and shock-resistant multilayered container having at least (i) an outermost layer of a propylene type polymer A which chiefly includes a homopolypropylene having a melt flow rate of 2.0 to 10.0 g/10 min., and (ii) an inner layer of a propylene type polymer B which chiefly includes a homopolypropylene having a melt flow rate of not more than 1.0 g/10 min.

Multilayered containers

A multilayer container including: an outermost layer (1) containing a propylene-based polymer A containing homopolypropylene as a main component having a melt flow rate in a range of 2.0 to 10.0 g/10 min; an inner layer (2) containing 50 to 99% by weight of a propylene-based polymer B containing homopolypropylene as a main component having a melt flow rate of not more than 5.0 g/10 min and an isotactic index of not less than 93%, and 1 to 50% by weight of an ethylene-&#x3b1;-olefin copolymer C; and a barrier layer (4) occupying 5 to 20% by weight of the whole container. The ratio (L/D) of container height (L) to diameter (D) is not less than 0.5, and a volume shrinkage based on volume measured before and after heat sterilization at 121&#xb0; C. for 30 minutes is not more than 5%.

Heat-resistant multilayer container and method for producing the same

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Yokohama, Japan

Azusa Otsuki