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:
Nov. 02, 2010
Filed:
Jun. 21, 2007
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
In an electrically conductive sheath-core conjugate fiber including an electrically conductive layer made of a thermoplastic polymer (A) containing electrically conductive carbon black fine particles which constitutes a sheath component and a protective layer made of a fiber-forming thermoplastic polymer (B) which constitutes a core component, the ratio of the (A) to the total weight of the (A) and the (B) is 10 to 35% by weight, the L/Lratio is 1.04 to 10.0 where Lrepresents the length of a boundary between the core component and the sheath component in a cross section of the conjugate fiber and Lrepresents the length of the circumference of a circle having an area equal to a cross sectional area of the core component, the fineness, the strength at break and the elongation at break are each adjusted within specified ranges, the shrinkage in hot water at 100° C. is within a specified range, and the fiber surface coverage of the sheath component is 85% or more. This results in provision of an electrically conductive sheath-core conjugate fiber that is excellent in antistatic performance, which is hardly degraded even after long-term wearing, that is maintained for a long time, and that is excellent in durability. A method for producing the electrically conductive sheath-core conjugate fiber and a dust-proof clothing using such a fiber are also provided.