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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.:

US 10158112 B1

PDFFull Text
Date of Patent:
Dec. 18, 2018

Filed:

Sep. 29, 2014

Porous membrane, battery separator obtained using same, and method of producing same

Applicant:

Toray Industries, Inc., Tokyo, JP;

Inventors:

Naoki Mizuno, Nasushiobara, JP;

Koichi Matano, Nasushiobara, JP;

Assignee:

TORAY INDUSTRIES, INC., Tokyo, JP;

Attorney:

Kilpatrick Townsend and Stockton LLP

Primary Examiner:

Muhammad S Siddiquee

Int. Cl.
CPC ...
H01M 2/14 (2006.01); H01M 2/16 (2006.01); B32B 27/32 (2006.01); B32B 27/08 (2006.01); B32B 27/28 (2006.01); B32B 27/30 (2006.01); B32B 27/34 (2006.01); B32B 3/26 (2006.01); C08J 5/18 (2006.01); C08J 7/04 (2006.01); B32B 7/12 (2006.01); B32B 15/08 (2006.01); B32B 15/20 (2006.01); B32B 27/20 (2006.01); B32B 3/30 (2006.01); B32B 15/04 (2006.01); B32B 38/00 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1686 (2013.01); B32B 3/26 (2013.01); B32B 3/30 (2013.01); B32B 7/12 (2013.01); B32B 15/04 (2013.01); B32B 15/08 (2013.01); B32B 15/20 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/205 (2013.01); B32B 27/281 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/327 (2013.01); B32B 27/34 (2013.01); C08J 5/18 (2013.01); C08J 7/047 (2013.01); H01M 2/145 (2013.01); H01M 2/166 (2013.01); H01M 2/1653 (2013.01); B32B 2038/0028 (2013.01); B32B 2250/24 (2013.01); B32B 2255/10 (2013.01); B32B 2255/26 (2013.01); B32B 2264/10 (2013.01); B32B 2307/20 (2013.01); B32B 2307/206 (2013.01); B32B 2307/51 (2013.01); B32B 2307/518 (2013.01); B32B 2307/54 (2013.01); B32B 2307/542 (2013.01); B32B 2307/584 (2013.01); B32B 2307/7242 (2013.01); B32B 2457/10 (2013.01); C08J 2323/06 (2013.01); C08J 2423/06 (2013.01); C08J 2479/08 (2013.01);
Abstract

Considering that the battery separator of embodiments of the present invention will have thinner materials and lower costs, provided are a polyolefin porous membrane with exceptionally high peel strength between the polyolefin porous membrane and a modified porous layer, suitable for high-speed processing during slit processing and the battery assembly process, and suitable for laminating on a modified porous layer, and a battery separator obtained by laminating a modified porous layer on the polyolefin porous membrane. A polyolefin porous membrane comprising protrusions of polyolefin having a size (W) within a range of 5 μm≤W≤50 μm and a height (H) within a range of 0.5 μm≤H and irregularly disposed on both sides of the polyolefin porous membrane in a density not less than 3/cmand not more than 200/cmper side, and the polyolefin porous membrane having a thickness of not more than 25 μm.

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