Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Filaments
Patent
1989-06-15
1991-11-19
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Filaments
264 297, 264 83, 2642107, 2642108, 26421115, 26421117, D01F 922
Patent
active
050664336
ABSTRACT:
Process of carbon fiber manufacture wherein the polyacrylonitrile precursor is stretched prior to oxidation step of the carbonization operation but after the stretching step of the spinning operation in limited temperature range. Process permits greater throughput in precursor manufacture and reduces flaws in the precursor because significant stretching is at lower line speeds typically used for oxidation and carbonization in making carbon fiber.
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patent: 4452860 (1984-06-01), Obama et al.
patent: 4695415 (1987-09-01), Setsui et al.
Edwards David
Hercules Incorporated
Lorin Hubert C.
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