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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 9614212 B1

PDFFull Text
Date of Patent:
Apr. 04, 2017

Filed:

Jan. 14, 2015

Method of producing composite porous membrane

Applicant:

Toray Battery Separator Film Co., Ltd., Nasushiobara, JP;

Inventors:

Naoki Mizuno, Ohtsu, JP;

Michihiko Irie, Ohtsu, JP;

Yoshitaka Ayuzawa, Ohtsu, JP;

Masanori Nakamura, Ohtsu, JP;

Assignee:

Toray Battery Separator Film Co., Ltd., , JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Michael Tolin

Int. Cl.
CPC ...
B32B 3/26 (2006.01); B32B 27/28 (2006.01); B32B 27/32 (2006.01); B32B 27/34 (2006.01); C08J 9/28 (2006.01); H01M 2/16 (2006.01); H01M 2/14 (2006.01); B29C 67/20 (2006.01); B32B 37/00 (2006.01); B32B 27/08 (2006.01); B32B 27/16 (2006.01); B32B 37/26 (2006.01);
U.S. Cl.
CPC ...
H01M 2/145 (2013.01); B29C 67/202 (2013.01); B32B 3/26 (2013.01); B32B 27/08 (2013.01); B32B 27/16 (2013.01); B32B 27/281 (2013.01); B32B 27/32 (2013.01); B32B 27/34 (2013.01); B32B 37/025 (2013.01); C08J 9/28 (2013.01); H01M 2/1653 (2013.01); H01M 2/1686 (2013.01); B32B 2037/268 (2013.01); B32B 2250/02 (2013.01); B32B 2250/24 (2013.01); B32B 2305/026 (2013.01); B32B 2307/308 (2013.01); B32B 2307/724 (2013.01); B32B 2457/10 (2013.01);
Abstract

A method produces a composite porous membrane including a porous membrane A formed of a polyolefin-based resin; and a porous membrane B containing a heat-resistant resin and laminated on the porous membrane A, including: (i) applying a heat-resistant resin solution onto a base film, followed by passing the coated film through a low-humidity zone, and then through a high-humidity zone to form a heat-resistant resin membrane on the base film; and (ii) bonding together the heat-resistant resin membrane formed in step (i) and a porous membrane A formed of a polyolefin-based resin, followed by converting the heat-resistant resin membrane into a porous membrane B by immersion in a solidification bath, and washing and drying the same to obtain the composite porous membrane.

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