Unitika Ltd.

Shiseido Company, Limited

Akinobu Ogami

Kazue Ueda

Fumio Matsuoka

Takuma Yano

Miho Nakai

Mitsuhiro Kawahara

Masami Okamoto

Kazuko Yoshimura

Kazunobu Yamada

Motoki Takata

Tatsuya Matsumoto

Takahiro Kusumoto

Shun Takahashi

Shigeru Hayase

Motoki c/oShisheido Research Center Takata

Takahiro c/oShisheido Research Center Kusumoto

Shun c/oShisheido Research Center Takahashi

A biodegradable gas barrier vessel comprising 100 parts of mass of a biodegradable polyester resin having a polylactic acid content of not less than 50% by mass and 0.1 to 10 parts by mass of a phyllosilicate. The degree of crystallization as measured by X-ray diffractometry is not less than 15%, and the coefficient of oxygen permeation as measured under conditions of 20&#xb0; C. and relative humidity 90% is not more than 50 ml&#xb7;mm/m&#xb7;day&#xb7;MPa. Since the biodegradable polyester resin reinforced with the phyllosilicate has excellent heat resistance, the molded product can be heat treated at an elevated temperature. Such enhanced heat treatment conditions can further enhance the degree of crystallization of the polyester resin and thus can contribute to significantly improved gas barrier properties.

Biodegradable gas barrier container and process for producing the same

A biodegradable resin composition is provided, which is highly transparent with little agglomeration. The biodegradable resin composition comprises a biodegradable polyester resin, a phyllosilicate, and at least one of a polyether phosphate compound, a polar wax and jojoba oil.

Biodegradable resin composition, production method therefor, and product molded or formed therefrom

It is intended to provide a biodegradable polyester resin composition which is excellent in gas barrier properties, mechanical strength and heat resistance and has Theological characteristics advantageously usable in molding a foamed article, etc., a process for producing the same, and a foamed article and a molded article using the same. The biodegradable polyester resin composition contains 100 parts by mass of a biodegradable polyester resin containing 59% mole or more of a hydroxycarboxylic acid unit, 0.01 to 10 parts by mass of a (meth)acrylic acid ester compound and 0.05 to 20 parts by mass of a layered silicate.

Biodegradable polyester resin composition, process for producing the same and foamed article and molded article using the same

A biodegradable resin composition and an object molded or formed from the composition. The resin composition comprises: 100 parts by weight of a biodegradable polyester resin comprising not smaller than 50% by weight of polylactic acid having a melting point of not lower than 160&#xb0; C., the biodegradable polyester resin having a melt flow rate of 0.1 to 50 g/10 min as measured under a load of 21.2 N at 190&#xb0; C.; and 0.1 to 20 parts by weight of a phyllosilicate containing a primary, secondary or tertiary amine salt, a quaternary ammonium salt or a phosphonium salt ionically bonded between layers thereof.

Biodegradable resin composition for molding and object molded or formed from the same

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Uji, Japan

Akinobu Ogami