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:
Mar. 14, 2017
Filed:
Mar. 22, 2013
Applicant:
Toray Battery Separator Film Co., Ltd., Nasushiobara, JP;
Inventors:
Hideto Mitsuoka, Nasushiobara, JP;
Shintaro Kikuchi, Nasushiobara, JP;
Kazuhiro Yamada, Nasushiobara, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 (2006.01); B29D 7/01 (2006.01); B29C 47/00 (2006.01); C08J 9/28 (2006.01); C08J 9/36 (2006.01); H01M 2/14 (2006.01); B29K 23/00 (2006.01); B29K 105/00 (2006.01); B29L 7/00 (2006.01); B29L 31/34 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1686 (2013.01); B29C 47/0021 (2013.01); B29D 7/01 (2013.01); C08J 9/28 (2013.01); C08J 9/365 (2013.01); H01M 2/145 (2013.01); H01M 2/1653 (2013.01); B29K 2023/065 (2013.01); B29K 2023/0683 (2013.01); B29K 2105/0088 (2013.01); B29L 2007/001 (2013.01); B29L 2031/3468 (2013.01); C08J 2323/06 (2013.01);
Abstract
A polyethylene microporous membrane has a Gurley air permeability of 1 to 1,000 sec/100 mL/25 μm, wherein the total length of waviness widths in the width direction of the polyethylene microporous membrane is not more than one-third of the overall width of the microporous membrane. The polyethylene microporous membrane has excellent planarity without compromising any other important physical property such as permeability.