Invention Grant
- Patent Title: Method for producing graphite film, method for rewinding same, and method for producing graphite composite film and graphite die-cutting product
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Application No.: US14971765Application Date: 2015-12-16
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Publication No.: US09682542B2Publication Date: 2017-06-20
- Inventor: Yusuke Ohta , Takashi Inada , Makoto Mishiro , Yasushi Nishikawa , Takashi Inada
- Applicant: Kaneka Corporation
- Applicant Address: JP Osaka
- Assignee: KANEKA CORPORATION
- Current Assignee: KANEKA CORPORATION
- Current Assignee Address: JP Osaka
- Agency: Kagan Binder, PLLC
- Priority: JP2010-035865 20100222
- Main IPC: C01B31/00
- IPC: C01B31/00 ; B65H18/08 ; B32B37/20 ; B32B9/00 ; B32B7/12 ; B32B37/00 ; B32B38/10 ; B32B37/12 ; B32B38/18

Abstract:
A graphite film showing an extremely low average tearing force is more likely to suffer from various kinds of defects, such as splitting, winding deviation, wrinkling, and poor dimensional accuracy, in a step of producing the graphite film and in a step of processing the graphite film. However, these defects can be prevented by using a graphite film that satisfies the following requirements: 1) having an average tearing force of not more than 0.08 N as determined by Trouser tear method in accordance with JIS K7128; and 2) having sag of not less than 5 mm and not greater than 80 mm as determined by a method of film windability evaluation in accordance with JIS C2151.
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