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:
Aug. 01, 2017
Filed:
Mar. 13, 2014
Toray Industries, Inc., Tokyo, JP;
Tomoyuki Inoue, Ibaraki, JP;
Tetsuya Asano, Ibaraki, JP;
Toray Industries, Inc., , JP;
Abstract
A biaxially orientated polypropylene film for capacitor includes protrusions on both surfaces. The biaxially orientated polypropylene film has a thickness (t1) of 1 to 3 μm, has a ten point average roughness (SRz) of 50 nm or more and less than 500 nm on both surfaces, and meets equations (1) and (2) where one surface and the other surface are referred to as a surface A and a surface B, respectively:150≦≦400  (1)50≦≦150  (2)wherein Pa denotes number of protrusions per 0.1 mmon the surface A and Pb denotes number of protrusions per 0.1 mmon the surface B.