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Patent Searching and Data


Title:
CARBON FIBER SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2021/070652
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a carbon fiber sheet that has excellent water repellency and that makes it possible to achieve high flooding resistance by using said carbon fiber sheet as a gas diffusion electrode base material in a solid polymer fuel cell. The present invention is a carbon fiber sheet including carbon fibers, a binder for binding the carbon fibers together, and a water repellent agent containing a fluororesin, wherein the intersecting points of the carbon fibers include binding sections to which the binder adheres in a web-like shape and the difference between the fluorine/carbon strength ratio of the carbon fiber surfaces and the fluorine/carbon strength ratio of the binding section surfaces as measured in a central surface of the carbon fiber sheet in the thickness direction thereof by energy dispersive X-ray spectroscopy is 0.20 or less.

Inventors:
OTAKE HIROAKI (JP)
UTSUNOMIYA MASAMICHI (JP)
WATANABE FUMITAKA (JP)
Application Number:
PCT/JP2020/036531
Publication Date:
April 15, 2021
Filing Date:
September 28, 2020
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D04H1/4242; D06M15/256; H01M4/86; H01M4/96; H01M8/10; D06M101/40
Foreign References:
JP2003303595A2003-10-24
JPH02117068A1990-05-01
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