Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Of inorganic materials
Patent
1994-11-01
1997-07-15
Seidleck, James J.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Of inorganic materials
264 291, 264 451, 264 452, 264 453, 428166, 428167, 428188, 1563066, B29C 6500
Patent
active
056480270
ABSTRACT:
A slurry containing a precursor fiber convertible to carbon fiber and/or a carbon fiber and, based on 100 parts by weight of the fiber, 10 to 300 parts by weight of a thermosetting resin, e.g. phenol resin, is processed into a random web. This web may contain a pitch or an organic granular material. The web is hot-pressed between a pair of belts while curing of the resin is inhibited to prepare a prepreg sheet. This sheet is disposed, leaving a clearance, in a mold having ribs on a molding surface and heated over the melting point of the resin for expansion and complete cure to provide a porous composite sheet equipped with grooves. This porous composite sheet is carbonized or graphitized to produce a porous carbonaceous material for use as a fuel cell electrode material and so on. This porous carbonaceous material has high homogeneity, gas permeability, electrical conductivity, heat conductivity and mechanical strength.
REFERENCES:
patent: 5021284 (1991-06-01), Miwa et al.
Asami Keiichi
Iwaya Yoshiaki
Nakagawa Yoshiteru
Okumura Shinji
Tajiri Hiroyuki
Osaka Gas Company Ltd.
Seidleck James J.
Truong Duc
Unitika Limited
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