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Title:
METHOD FOR PRODUCING CARBON FIBER
Document Type and Number:
Japanese Patent JP2004176236
Kind Code:
A
Abstract:

To provide a method for efficiently producing a carbon fiber, preferably, an ultra-fine carbon fiber, and to provide the ultra-fine carbon fiber excellent in mechanical characteristics and having a fiber diameter of 0.001-5 μm.

This method for producing the carbon fiber comprises processes (1) to (4) as follows: (1) a thermoplastic resin in an amount of 100pts.wt. is mixed with at least one kind of carbon precursor organic compound (A) selected from the group consisting of pitch, polyarylonitrile, cellulose, and polycarbodiimide in an amount of 1-150pts.wt., then the mixture is spun to produce a carbon fiber precursor (B); (2) the carbon fiber precursor organic compound (A) contained in the carbon fiber precursor (B) is subjected to stabilization treatment to produce a carbon fiber stabilized precursor (C); (3) the thermoplastic resin contained in the carbon fiber stabilized precursor (C) is removed; and (4) the carbon fiber stabilized precursor from which the thermoplastic resin is removed (D) is carbonized or graphitized to produce the carbon fiber.


Inventors:
HIRATA SHIGEKI
SAKURAI HIROSHI
SAWAKI TORU
Application Number:
JP2002349633A
Publication Date:
June 24, 2004
Filing Date:
December 02, 2002
Export Citation:
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Assignee:
TEIJIN LTD
International Classes:
D01F9/145; D01F9/22; (IPC1-7): D01F9/145; D01F9/22
Attorney, Agent or Firm:
Hideko Mihara