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. 02, 2014
Filed:
Sep. 06, 2011
Kenko Yamada, Otsu, JP;
Satoshi Naruko, Otsu, JP;
Kenko Yamada, Otsu, JP;
Satoshi Naruko, Otsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A nonwoven fabric suitable for electrical insulation or as a battery separator is provided. The nonwoven fabric includes a PPS fiber, the nonwoven fabric being obtainable by a process for papermaking and having a front surface with a water contact angle greater than that of a back surface of the nonwoven fabric by 5° or more. A suitable method for producing the nonwoven fabric includes dispersing an undrawn polyphenylene sulfide fiber in water, depositing the fiber to form paper, and performing heat and pressure treatment with a calender having two rolls with surface temperatures different by 10° C. or more.