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:
Jan. 03, 2012
Filed:
Sep. 29, 2006
Jun'ichi Masuda, Otsu, JP;
Masatoshi Ohkura, Otsu, JP;
Shigeru Tanaka, Otsu, JP;
Hajime Fukushima, Otsu, JP;
Jun'ichi Masuda, Otsu, JP;
Masatoshi Ohkura, Otsu, JP;
Shigeru Tanaka, Otsu, JP;
Hajime Fukushima, Otsu, JP;
TORAY Industries, Inc., Tokyo, JP;
Abstract
There are provided a microporous film for an electric storage device separator, which can increase energy density and power density when used in an electric storage device, and which is excellent in handling properties in a processing step to the electric storage device, as well as an electric storage device separator and an electric storage device, using the microporous film. Specifically, provided is a microporous film for an electric storage device separator, characterized by including a porosity of 70% or more, a strength of 40 MPa or more in a longitudinal direction, an average pore size of from 40 to 400 nm, anuclear pores, and exhibiting biaxial orientation.