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:
Dec. 01, 2015
Filed:
Aug. 29, 2005
Applicants:
Hiroshi Hatayama, Moriyama, JP;
Hiroshi Sogo, Moriyama, JP;
Inventors:
Hiroshi Hatayama, Moriyama, JP;
Hiroshi Sogo, Moriyama, JP;
Assignee:
ASAHI KASEI CHEMICALS CORPORATION, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01M 2/14 (2006.01); H01M 2/16 (2006.01); C08J 5/18 (2006.01); H01M 10/052 (2010.01); H01M 10/42 (2006.01);
U.S. Cl.
CPC ...
H01M 2/1653 (2013.01); C08J 5/18 (2013.01); H01M 2/145 (2013.01); H01M 2/1646 (2013.01); C08J 2323/00 (2013.01); H01M 10/052 (2013.01); H01M 10/4235 (2013.01);
Abstract
A microporous film, characterized in that it is prepared by a method comprising melting and kneading a polyolefin resin, inorganic particles and a plasticizer, forming the resultant mixture into a sheet, subjecting the rejecting the resultant sheet to a biaxial stretching treatment of a surface magnification of not less than 20 and less than 100 times, and then extracting the plasticizer, it has an inorganic particle content of 20 to 60 mass %, and it exhibits a piercing strength of 3.0 N/20 μm or more.