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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.:

US 9365954 B1

PDFFull Text
Expired
Date of Patent:
Jun. 14, 2016

Filed:

Feb. 19, 2013

Polyphenylene sulfide fiber, filter cloth comprising polyphenylene sulfide fiber, and method for producing polyphenylene sulfide fiber

Applicant:

Toray Industries, Inc., Tokyo, JP;

Inventors:

Takeshi Sugimoto, Iyo-gun, JP;

Keiji Kaiho, Iyo-gun, JP;

Koichiro Maeda, Iyo-gun, JP;

Assignee:

TORAY INDUSTRIES, INC., Tokyo, JP;

Attorneys:

Venable LLP

Michael A. Sartori

David M. Klecyngier

Primary Examiner:

Jason M Greene

Assistant Examiner:

Karla Hawkins

Int. Cl.
CPC ...
B01D 39/00 (2006.01); D01F 6/76 (2006.01); D01D 5/12 (2006.01); D04H 1/4326 (2012.01); D04H 1/46 (2012.01); D04H 1/492 (2012.01); B01D 39/08 (2006.01); B29C 47/00 (2006.01);
U.S. Cl.
CPC ...
D01F 6/765 (2013.01); B01D 39/083 (2013.01); B29C 47/0014 (2013.01); D01D 5/12 (2013.01); D04H 1/4326 (2013.01); D04H 1/46 (2013.01); D04H 1/492 (2013.01); B01D 2239/0618 (2013.01);
Abstract

The present invention provides: a polyphenylene sulfide fiber that has excellent tensile strength; and a polyphenylene sulfide fiber that decreases in toughness to a small extent even when subjected to a long-term heat treatment and has excellent tensile strength. The polyphenylene sulfide fiber according to the present invention is characterized by comprising a polyphenylene sulfide resin having a weight average molecular weight of 50000 to 80000 inclusive, having a rigid amorphous content of 50% or more, and having a crystal size of 5 nm or more in the direction of a (111) crystal plane.

Find Patent Forward Citations

Sugimoto, Takeshi. (2016). Polyphenylene sulfide fiber, filter cloth comprising polyphenylene sulfide fiber, and method for producing polyphenylene sulfide fiber (U.S. Patent No. 9365954). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9365954

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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