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:
Jun. 16, 2020
Filed:
Dec. 25, 2015
Applicant:
Toray Industries, Inc., Tokyo, JP;
Inventors:
Assignee:
TORAY INDUSTRIES, INC., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/02 (2006.01); H01M 2/16 (2006.01); C08J 9/28 (2006.01); H01M 2/14 (2006.01); C08F 10/02 (2006.01); H01M 10/00 (2006.01);
U.S. Cl.
CPC ...
H01M 2/162 (2013.01); C08F 10/02 (2013.01); C08J 9/28 (2013.01); H01M 2/145 (2013.01); H01M 2/16 (2013.01); H01M 2/1653 (2013.01); C08F 2500/12 (2013.01); H01M 10/00 (2013.01);
Abstract
A polyolefin microporous membrane is disclosed. The membrane includes a polyolefin resin having an MFR value of not greater than 2.0 g/10 min, and a crystal nucleating agent. The polyolefin microporous membrane has an air permeation resistance scaled to a thickness of 20 μm of from 100 to 500 sec/100 cc, a porosity of from 20% to 60%, and a mean flow pore size of not greater than 100 nm.