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. 11, 2017
Filed:
Mar. 10, 2015
Toray Battery Separator Film Co., Ltd., Nasushibora-shi, Tochigi Prefecture, JP;
Masami Sugata, Tochigi, JP;
Koichi Matano, Tochigi, JP;
Naoki Mizuno, Tochigi, JP;
Kosuke Harumoto, Tochigi, JP;
TORAY BATTERY SEPARATOR FILM CO., LTD., Tochigi, JP;
Abstract
Considering that battery separators will require further thinner materials and lower costs in the future, a battery separator of the present invention, in which multi-layer polyolefin porous membrane with exceptionally high peel strength against a modified porous layer, suitable for high-speed processing during slit process and battery assembly process, and suitable for laminating on a multi-layer modified porous layer, and a multi-layer modified porous layer are laminated, is provided. A multi-layer polyolefin porous membrane comprising at least two or more layers, the multi-layer polyolefin porous membrane having a shut-down temperature in a range of 128 to 135° C., a rate of increase in air permeation resistance from 30° C. to 105° C. scaled to 20 μm thickness less than 1.5 sec/100 cc Air/° C., and a thickness not more than 20 μm.