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:
Dec. 22, 1998
Filed:
Nov. 08, 1995
Kazuyuki Yabuki, Ohtsu, JP;
Takaharu Ichiryu, Ohtsu, JP;
Tadao Kuroki, Ohtsu, JP;
Mitsuhiro Sakuda, Ohtsu, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
Crimped polybenzazole staple fibers which satisfy the following specifications at the same time: (1) 2.ltoreq.number of crimps (number/inch).ltoreq.40 (2) 2.ltoreq.crimp index (%).ltoreq.30 (3) 0.3.ltoreq.crimp index/number of crimps.ltoreq.3.0; methods for manufacturing crimped polybenzazole staple fibers; and the rotary cutter therefor. The crimped polybenzazole staple fibers of the present invention are superior in crimp property and are useful for manufacturing spun yarn and unwoven fabric. According to the method of the present invention, crimped polybenzazole staple fibers superior in spinnability can be manufactured with ease. In addition, the cutting blade of the present invention stands a long time use for manufacturing staple fibers from a continuous filaments tow of high tenacity fibers.