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. 03, 2010
Filed:
Oct. 13, 2006
Hitoshi Nakatsuka, Osaka, JP;
Tadayoshi Koizumi, Kurashiki, JP;
Kazuhiko Tanaka, Osaka, JP;
Nobuhiro Koga, Kurashiki, JP;
Masao Kawamoto, Kurashiki, JP;
Kenichi Yoshioka, Saijo, JP;
Hitoshi Nakatsuka, Osaka, JP;
Tadayoshi Koizumi, Kurashiki, JP;
Kazuhiko Tanaka, Osaka, JP;
Nobuhiro Koga, Kurashiki, JP;
Masao Kawamoto, Kurashiki, JP;
Kenichi Yoshioka, Saijo, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
An electrically conductive composite fiber comprising an electrically conductive layer formed of a polyester-based polymer (A) having a melting point of 200° C. or higher and containing from 23 to 33% by weight of electrically conductive carbon black, and a protective layer formed of a polyester-based polymer (B) having a melting point of 210° C. or higher, wherein the difference between the SP value of the (A) and the SP value of the (B) is adjusted to not greater than a predetermined value and the fiber strength and the elongation at break are adjusted within certain ranges. This can make it possible to obtain an electrically conductive composite fiber that has a superior antistatic performance, which is not degraded very much over a practical wearing for a long term, though it contains only a relatively small amount of electrically conductive carbon black, and that is suitable for the field of clothing such as clean room wears and working wears.