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:
Jun. 05, 2018
Filed:
Apr. 19, 2011
Takanori Nakatsuka, Tsuchiura, JP;
Masami Sugata, Tsuchiura, JP;
Tetsuya Asano, Tsuchiura, JP;
Toray Industries, Inc., , JP;
Abstract
Provided is a biaxially stretched polypropylene film for capacitors which has high withstand voltage characteristics when used as a dielectric for capacitors and which has highly suitable processability into elements. The biaxially stretched polypropylene film for capacitors has projections on both surfaces and has a thickness (t, μm) of 4-20 μm. When one of the surfaces is expressed by surface A and the other by surface B, all of the following relationships are satisfied. 800≤SRzB≤1,300 (nm) 0.1≤SRzA/SRzB≤0.8 PBmin≥100 (nm) PBmax≤1,500 (nm) 0.4≤PB450-750/PB≤0.7.