The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 19, 2011
Filed:
Jun. 08, 2005
Mitsuhiro Kawahara, Uji, JP;
Miho Nakai, Uji, JP;
Kazue Ueda, Uji, JP;
Akinobu Ogami, Uji, JP;
Shun Takahashi, Yokohama, JP;
Takahiro Kusumoto, Yokohama, JP;
Motoki Takata, Yokohama, JP;
Mitsuhiro Kawahara, Uji, JP;
Miho Nakai, Uji, JP;
Kazue Ueda, Uji, JP;
Akinobu Ogami, Uji, JP;
Shun Takahashi, Yokohama, JP;
Takahiro Kusumoto, Yokohama, JP;
Motoki Takata, Yokohama, JP;
Unitika Ltd., Hyogo, JP;
Shiseido Company, Ltd., Tokyo, JP;
Abstract
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° C. and relative humidity 90% is not more than 50 ml·mm/m·day·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.