System to continuously produce carbon fiber via microwave...

Coating apparatus – Gas or vapor deposition – Running length work

Reexamination Certificate

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C118S7230MW, C156S345410

Reexamination Certificate

active

07824495

ABSTRACT:
A system to continuously produce fully carbonized or graphitized carbon fibers using microwave-assisted plasma (MAP) processing comprises an elongated chamber in which a microwave plasma is excited in a selected gas atmosphere. Fiber is drawn continuously through the chamber, entering and exiting through openings designed to minimize in-leakage of air. There is a gradient of microwave power within the chamber with generally higher power near where the fiber exits and lower power near where the fiber enters. Polyacrylonitrile (PAN), pitch, or any other suitable organic/polymeric precursor fibers can be used as a feedstock for the inventive system. Oxidized or partially oxidized PAN or pitch or other polymeric fiber precursors are run continuously through a MAP reactor in an inert, non-oxidizing atmosphere to heat the fibers, drive off the unwanted elements such as oxygen, nitrogen, and hydrogen, and produce carbon or graphite fibers faster than conventionally produced carbon fibers.

REFERENCES:
patent: 3607062 (1971-09-01), Sudduth
patent: 3824398 (1974-07-01), Boom
patent: 4197282 (1980-04-01), Bailly-Lacresse
patent: 5037464 (1991-08-01), Oohashi et al.
patent: 6186090 (2001-02-01), Dotter et al.
patent: 6372192 (2002-04-01), Paulauskas
patent: 6375875 (2002-04-01), Paulauskas
patent: 6514449 (2003-02-01), Paulauskas
patent: 6749827 (2004-06-01), Smalley
patent: 2002/0015802 (2002-02-01), Ozaki et al.
patent: 2003/0026980 (2003-02-01), Takeda
patent: 2003/0051993 (2003-03-01), Ricatto
patent: 2004/0063839 (2004-04-01), Kawate
patent: 2004/0258606 (2004-12-01), Yamamoto
Cohn and Das, A cost assessment of PAN fiber production technologies: conventional and microwave cases, ORNL report to DOE, Feb. 1999.
Delmonte, Technology of Carbon and Graphite Fiber Composites, 1981, pp. 55-61 and 191-192, Van Nostrand Reinhold, New York.
Peebles, Carbon Fibers—Formation, Structure, and Properties, 1995, pp. 18-24 and 128-135, CRC Press, Boca Raton.
Donnet et al., Carbon Fibers, Third Edition, 1998, pp. 27-31 and 180-189, Marcel Dekker, New York.
Johnson, Carbon Fibers, pp. 329-336 in Structure Formation in Polymeric Fibers, D. R. Salem, Editor, 2001, Hanser, Munich.
Pocius, Adhesion and Adhesives Technology, 1997, pp. 159-163, Hanser, Munich.

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