Chemistry of inorganic compounds – Carbon or compound thereof – Elemental carbon
Patent
1990-03-21
1991-01-29
Chaudhuri, Olik
Chemistry of inorganic compounds
Carbon or compound thereof
Elemental carbon
4234471, 4234472, 4234476, 264 292, D01F 912
Patent
active
049884921
ABSTRACT:
This invention provides a method for infusibilization of pitch fibers for production of carbon fibers which comprises putting pitch fibers prepared by melt spinning from a spinning pitch in containers, introducing in succession the containers containing the pitch fibers into an infusibilizing furnace divided into a plurality of sections and passing the containers therethrough from inlet to outlet wherein the containers containing the pitch fibers are intermittently moved through the infusiblizing furnace to retain each of the containers in respective sections for a given period of time, during which temperature of respective sections is independently raised from minimum controlled temperature to maximum controlled temperature and thereafter is lowered to the minimum controlled temperature and then the container is moved.
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Patent Abstracts of Japan, vol. 9, No. 134 (C-285) [1857], Jun. 8, 1985.
Hara Yojiro
Ishikawa Shinzo
Matsumoto Taiji
Shono Hiroaki
Chaudhuri Olik
Kawasaki Steel Corporation
Kunemund Robert M.
Nitto Boseki Co. Ltd.
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