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. 01, 2006
Filed:
Jan. 29, 2003
Yoshihiro Yamana, Okayama, JP;
Hiroyuki Ono, Kurashiki, JP;
Yoshihiro Yamana, Okayama, JP;
Hiroyuki Ono, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki, JP;
Abstract
The present invention provides a thermoplastic polyurethane composition which comprises an ethylene-vinyl alcohol copolymer and/or a polyamide, and a thermoplastic polyurethane, in which the retention of melt tension thereof, when kept in a molten state at 220° C. for 1 hour, determined by the following equation (1), is not less than 10%.Retention of melt tension (%)=[Melt tension after being kept in a molten state/Melt tension before being kept in a molten state]×100   (1) The thermoplastic polyurethane composition of the present invention is excellent in production stability of a molded article, and can provide a molded article excellent in appearance because the progress of gelation thereof is suppressed even in a molten state.