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:
Feb. 18, 2014
Filed:
Sep. 21, 2007
Applicants:
Toshiyuki Shimizu, Tokyo, JP;
Masahiko Maeda, Tokyo, JP;
Inventors:
Toshiyuki Shimizu, Tokyo, JP;
Masahiko Maeda, Tokyo, JP;
Assignee:
Asahi Kasei Fibers Corporation, Osaka, JP;
Primary Examiner:
Int. Cl.
CPC ...
D04H 3/16 (2006.01); D04H 1/56 (2006.01); B32B 5/26 (2006.01); D04H 5/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention provides a heat-resistant nonwoven fabric wherein the nonwoven fabric is formed from a poly(phenylene sulfide) fiber, and 30% by weight or more of the poly(phenylene sulfide) fiber has a crystallinity of 25 to 50%. Moreover, the properties of the heat-resistant nonwoven fabric can be further improved by making the nonwoven fabric have a multilayer structure in which layers composed of a poly(phenylene sulfide) filamentary fiber and layers composed of a poly(phenylene sulfide) fine fiber are stacked and integrated.