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:
Apr. 18, 2017
Filed:
Dec. 12, 2012
Applicant:
Toray Battery Separator Film Co., Ltd., Nasushiobara, JP;
Inventors:
Takeshi Ishihara, Nasushiobara, JP;
Koichi Kono, Nasushiobara, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 69/00 (2006.01); B01D 71/00 (2006.01); C08J 9/00 (2006.01); C08J 9/28 (2006.01); H01M 2/16 (2006.01); B29C 47/00 (2006.01); B29D 99/00 (2010.01); C08L 23/06 (2006.01); H01M 2/14 (2006.01); B29L 31/00 (2006.01); B29C 55/12 (2006.01);
U.S. Cl.
CPC ...
C08J 9/28 (2013.01); B29C 47/0004 (2013.01); B29D 99/005 (2013.01); C08L 23/06 (2013.01); H01M 2/145 (2013.01); H01M 2/1653 (2013.01); B29C 47/0021 (2013.01); B29C 47/0057 (2013.01); B29C 55/12 (2013.01); B29K 2823/0683 (2013.01); B29L 2031/755 (2013.01); C08J 2323/06 (2013.01); C08J 2423/06 (2013.01); C08J 2423/12 (2013.01); C08L 2203/20 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2207/062 (2013.01); C08L 2207/068 (2013.01);
Abstract
A polyolefin microporous membrane is produced by forming a gel-like molding using a polyolefin resin containing polypropylene, and stretching the molding in at least one direction, followed by washing, the polyolefin microporous membrane having an injection of electrolyte of 20 seconds or less and a uniform polypropylene distribution in at least one plane perpendicular to the thickness direction.