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:
Oct. 31, 2017
Filed:
Mar. 15, 2013
Toray Industries, Inc., Tokyo, JP;
Toray Industries, Inc., , JP;
Abstract
A biaxially stretched polypropylene film for capacitors which has protrusions on both sides and has a thickness (t[μm]) of 1 μm to 3 μm, wherein Formulae (1) to (4) are satisfied by an A-side as one film surface and a B-side as another film surface:||≧200;  (1)0.350≦≦0.700;  (2)500 nm≦≦1,200 nm;  (3)50 nm≦≦500 nm;  (4)wherein, in Formulae (1) to (4), Pa is a number per 0.1 mmof protrusions on the A-side, Pb is a number per 0.1 mmof protrusions on the B-side, SRzA is a ten-point average roughness of the A-side, and SRzB is a ten-point average roughness of the B-side.