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:
Jul. 29, 2014
Filed:
Dec. 15, 2010
Kazuhiro Suzuki, Saitama, JP;
Kenro Takizawa, Saitama, JP;
Masaru Yoneyama, Saitama, JP;
Junya Ishida, Saitama, JP;
Kazuhiro Suzuki, Saitama, JP;
Kenro Takizawa, Saitama, JP;
Masaru Yoneyama, Saitama, JP;
Junya Ishida, Saitama, JP;
Shin-Etsu Polymer Co., Ltd., Tokyo, JP;
Abstract
A film for film capacitors having a thickness of 10 microns or less, is manufactured by the successive steps of: mixing and preparing a forming material composed of a thermoplastic resin composition; melting and extruding the forming material to a film through a T-die; pinching and cooling the film between a pressure roll and a cooling roll having a rough surface for forming a rough surface to the film, wherein the rough surface of the cooling roll has (σ/Ra) of 0.2 or less, and the rough surface of the film has (σ/Ra) of 0.2 or less, where (Ra) is an arithmetic average roughness defined by a method specified in JIS B 0601 2001, and (σ) is a standard deviation; and rolling up the cooled film onto a winding tube in a winding unit.