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:
Aug. 24, 1993
Filed:
Dec. 12, 1991
Mitsubishi Kasei Corporation, Tokyo, JP;
Abstract
A copolyester comprising a dicarboxylic acid component comprising (a) 80 to 99.5 mol % of terephthalic acid or an ester forming derivative thereof and (b) 0.5 to 4.5 mol % of a phenylenedioxy diacetic acid or an ester forming derivatives thereof and a diol component is described. Hollow containers and stretched film produced from the copolyester are further described. The copolyester has a high transparency, superior gas barrier property, mechanical strength, water resistance and heat resistance. In addition, since the copolyester has a low oligomer content, it scarcely contaminates a mold used in molding process, which leads to a high productivity. The molded article produced from the copolyester can be used widely as packaging materials including various films, sheets and containers. Moreover, since a molded article having superior properties is obtained form the copolyester alone, it is possible to manufacture various packaging materials without using a complicated apparatus and complicated process.