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:
Jul. 14, 2026
Filed:
Feb. 19, 2021
Teijin Limited, Osaka, JP;
Wataru Morimura, Osaka, JP;
Satoshi Nishikawa, Osaka, JP;
TEIJIN LIMITED, Osaka, JP;
Abstract
A separator for a non-aqueous secondary battery contains: a porous layer that is provided on only one side of the porous substrate, and that contains a resin having at least one bonding group selected from an amide bond, an imide bond, and a sulfonyl bond, in which, in the porous substrate, an absolute value of a difference between a temperature of an endothermic peak observed at 120° C. to 145° C., in a temperature raising process 1, and a temperature of an endothermic peak observed at 120° C. to 145° C., in a temperature raising process 2, is 1.50° C. or higher in DSC measurement when the temperature raising process 1 of continuously raising the temperature from 30° C. to 200° C. at a temperature change rate of 5° C./min in a nitrogen atmosphere, and the temperature raising process 2 of lowering the temperature from 200° C. to 30° C. and raising the temperature from 30° C. to 200° C., are performed.