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. 24, 1985
Filed:
Aug. 31, 1984
Applicant:
Inventors:
Takashi Fujiwara, Nobeoka, JP;
Tamio Ishitobi, Nobeoka, JP;
Assignee:
Asahi Kasei Kogyo Kabushiki Kaisha, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
528348 ; 521184 ;
Abstract
Poly(p-phenyleneterephthalamide) fibers having a very high tensile strength is described. The fibers consist essentially of poly(p-phenyleneterephthalamide) having an inherent viscosity of at least 5 dl/g as determined at 25.degree. C. in sulfuric acid having a concentration of 98 wt. % at a polymer concentration of 0.5 g/dl. The fibers are composed of single filaments of 0.5 to 3 denier, wherein the single filament tensile strength is at least 35 g/denier. The macrovoid number, hereinbefore defined, of the fibers is not more than 10 per 100 mm. The asymmetry, hereinbefore defined, of the fibers is not more than 0.2.