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:
May. 19, 2020
Filed:
Aug. 07, 2015
Toray Industries, Inc., Tokyo, JP;
Masami Sugata, Tochigi, JP;
Naoki Toyota, Tochigi, JP;
TORAY INDUSTRIES, INC., Tokyo, JP;
Abstract
The present invention provides a microporous membrane having an excellent balance of temperature characteristics, shrinkage characteristics, permeability, and strength, and thereby realizes a separator for a non-aqueous electrolyte secondary battery and a non-aqueous electrolyte secondary battery, having excellent performance and excellent safety. A polyolefin microporous membrane having; a temperature difference not less than 7.2° C. between a shutdown shrinkage temperature and a maximum shrinkage temperature in a TD measured by TMA; a shrinkage rate difference less than 25% between a shutdown shrinkage rate and a maximum shrinkage rate in the TD; a pin puncture strength at a membrane thickness of 16 μm being not less than 400 gf; and a ratio of pin puncture strength to air permeation resistance at a membrane thickness of 16 μm being from 2.0 to 4.0 (gf/(sec/100 cc)).