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:
Jul. 30, 2019
Filed:
Mar. 12, 2013
Applicant:
Asahi Kasei Fibers Corporation, Osaka-shi, Osaka, JP;
Inventors:
Assignee:
ASAHI KASEI FIBERS CORPORATION, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
A61F 2/89 (2013.01); A61F 2/95 (2013.01); A61L 31/06 (2006.01); D01F 6/62 (2006.01); D03D 15/00 (2006.01); A61L 27/18 (2006.01); A61L 27/50 (2006.01); A61L 31/14 (2006.01);
U.S. Cl.
CPC ...
A61F 2/89 (2013.01); A61F 2/95 (2013.01); A61L 27/18 (2013.01); A61L 27/50 (2013.01); A61L 27/507 (2013.01); A61L 31/06 (2013.01); A61L 31/14 (2013.01); D01F 6/62 (2013.01); D03D 15/0061 (2013.01); D10B 2331/04 (2013.01); D10B 2509/06 (2013.01); Y10T 428/1362 (2015.01); Y10T 428/249921 (2015.04); Y10T 428/2913 (2015.01);
Abstract
Provided is a superfine polyester fiber containing at least 98 wt % of a polyethylene terephthalate component, and characterized by fulfilling the following conditions: (1) the reduced viscosity (ηsp/c) is at least 0.80 dl/g; (2) the total fineness is 7-120 dtex, and the single filament fineness is no more than 0.5 dtex; and (3) the toughness parameter (X) indicated by formula (1) is at least 2.0, the tensile strength is at least 3.5 cN/dtex and the tensile elongation is at least 12%.=(tensile strength×√tensile elongation)/(total fineness×single filament fineness)  formula (1).