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. 13, 2021
Filed:
Nov. 14, 2016
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Naoki Mizuno, Nasushiobara, JP;
Masami Sugata, Nasushiobara, JP;
Assignee:
Toray Industries, Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 50/40 (2021.01); B32B 5/32 (2006.01); C08J 9/28 (2006.01); C09D 127/16 (2006.01); H01M 50/409 (2021.01); B29C 55/14 (2006.01); H01M 50/403 (2021.01); B29C 48/00 (2019.01); H01M 50/446 (2021.01); H01M 50/411 (2021.01); H01M 50/449 (2021.01); H01M 8/0239 (2016.01); C08L 23/06 (2006.01); C08L 27/16 (2006.01); C08L 27/20 (2006.01); H01M 10/0525 (2010.01);
U.S. Cl.
CPC ...
H01M 8/0239 (2013.01); B29C 48/0018 (2019.02); B29C 55/143 (2013.01); B32B 5/32 (2013.01); C08J 9/28 (2013.01); C08L 23/06 (2013.01); C08L 27/16 (2013.01); C08L 27/20 (2013.01); C09D 127/16 (2013.01); H01M 50/403 (2021.01); H01M 50/409 (2021.01); H01M 50/411 (2021.01); H01M 50/446 (2021.01); H01M 50/449 (2021.01); C08L 2203/20 (2013.01); H01M 10/0525 (2013.01);
Abstract
A battery separator includes a polyolefin microporous membrane and a porous layer placed on at least one surface of the polyolefin microporous membrane. The polyolefin microporous membrane has a variation range of an F25 value in a longitudinal direction of 1 MPa or less. The F25 value indicates a value obtained by dividing a load value measured at 25% elongation of a specimen with use of a tensile tester by a cross-sectional area of the specimen. The porous layer contains a fluorine-based resin and an inorganic particle and has an average thickness T(ave) of 1 to 5 μm.