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:
Apr. 15, 2008
Filed:
Jun. 26, 2003
Yukihiro Abe, Otsu, JP;
Go Matsuoka, Otsu, JP;
Kohei Kiriyama, Otsu, JP;
Hiroki Murase, Otsu, JP;
Muneatsu Nakamura, Otsu, JP;
Yukihiro Nomura, Otsu, JP;
Hironori Eguchi, Osaka, JP;
Yukinari Okuyama, Osaka, JP;
Tadao Kuroki, Osaka, JP;
Takaharu Ichiryu, Osaka, JP;
Hiroshi Tachimori, Otsu, JP;
Yukihiro Abe, Otsu, JP;
Go Matsuoka, Otsu, JP;
Kohei Kiriyama, Otsu, JP;
Hiroki Murase, Otsu, JP;
Muneatsu Nakamura, Otsu, JP;
Yukihiro Nomura, Otsu, JP;
Hironori Eguchi, Osaka, JP;
Yukinari Okuyama, Osaka, JP;
Tadao Kuroki, Osaka, JP;
Takaharu Ichiryu, Osaka, JP;
Hiroshi Tachimori, Otsu, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention relates to polybenzazole fibers or filaments, staple fibers, spun yarns, and woven or knitted fabrics containing in themselves an organic pigment having heat resistance as high as a thermal decomposition temperature of 200° C. or higher, and soluble in a mineral acid and having group(s) of —N═ and/or NH— in the molecule, such as any of perinones and/or perylenes, any of phthalocyanines, any of quinacridones, and any of dioxazines, wherein they have a strength retention of 50% or higher when exposed to light from a xenon lamp for 100 hours and having a tensile strength retention of 85% or higher after exposed to an atmosphere of a temperature of 80° C. and a relative humidity of 80% for 700 hours. The polybenzazole fibers or filaments, staple fibers, spun yarns, and woven or knitted fabrics can be used for cords for reinforcing rubber, sheets and rods for reinforcing cement/concrete, composite materials, sail clothes, ropes, knife proof vests and bullet proof vests.