Invention Grant
- Patent Title: Production method for porous polyimide resin film, porous polyimide resin film, and separator employing same
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Application No.: US14909716Application Date: 2014-08-06
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Publication No.: US09683087B2Publication Date: 2017-06-20
- Inventor: Tsukasa Sugawara
- Applicant: TOKYO OHKA KOGYO CO., LTD.
- Applicant Address: JP Kawasaki-Shi
- Assignee: TOKYO OHKA KOGYO CO., LTD.
- Current Assignee: TOKYO OHKA KOGYO CO., LTD.
- Current Assignee Address: JP Kawasaki-Shi
- Agency: Knobbe Martens Olson & Bear LLP
- Priority: JP2013-165407 20130808; JP2014-073987 20140331
- International Application: PCT/JP2014/070769 WO 20140806
- International Announcement: WO2015/020101 WO 20150212
- Main IPC: C08J9/26
- IPC: C08J9/26 ; C08J9/00 ; C08J5/18 ; H01M2/16 ; H01M10/0525 ; H01M2/14
Abstract:
A porous polyimide resin film having a high aperture ratio, and a method for producing a porous polyimide film. The method includes removing fine particles from a polyimide resin-fine particle composite film to obtain a porous polyimide resin film by either removing at least a part of a polyimide resin portion of the polyimide resin-fine particle composite film prior to removing the fine particles, or by removing at least a part of the porous polyimide resin film subsequent to removing the fine particles.
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