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Title:
CARBON FIBER FOR AQUEOUS PROCESS AND CHOPPED CARBON FIBER FOR AQUEOUS PROCESS
Document Type and Number:
WIPO Patent Application WO/2006/019139
Kind Code:
A1
Abstract:
This invention provides a carbon fiber for an aqueous process which is excellent in convergence and opening properties. The carbon fiber for an aqueous process comprises a plurality of converged single fibers and satisfies (1) the surface oxygen index (O/C) of the single fibers as measured by X-ray photoelectron spectroscopy (ESCA) is not less than 0.03 and less than 0.12, and a sizing agent composed mainly of a surfactant is deposited on the single fibers, and the first contact angle with water as measured by a Wilhelmy method is not more than 75 degrees, (2) the surface oxygen index (O/C) of the single fibers as measured by X-ray photoelectron spectroscopy (ESCA) is not less than 0.12 and less than 0.20, and a sizing agent composed mainly of a surfactant is deposited on the single fibers, and the first contact angle with water as measured by a Wilhelmy method is not more than 65 degrees, and (3) the surface oxygen index (O/C) of the single fibers as measured by X-ray photoelectron spectroscopy (ESCA) is not less than 0.20 and not more than 0.30, and a sizing agent composed mainly of a surfactant is deposited on the single fibers, and the first contact angle with water as measured by a Wilhelmy method is not more than 55 degrees.

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Inventors:
MURAI SHOJI (JP)
HONMA MASATO (JP)
TAKEBE YOSHIKI (JP)
NAKAYAMA YOSHIFUMI (JP)
Application Number:
PCT/JP2005/015076
Publication Date:
February 23, 2006
Filing Date:
August 18, 2005
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
MURAI SHOJI (JP)
HONMA MASATO (JP)
TAKEBE YOSHIKI (JP)
NAKAYAMA YOSHIFUMI (JP)
International Classes:
D06M13/17; D06M15/53; D21H13/50; H01M4/96; D06M101/40
Foreign References:
JP2000054269A2000-02-22
JP2002242028A2002-08-28
JPH03174201A1991-07-29
JP2003293264A2003-10-15
JPH10273882A1998-10-13
JPH06212565A1994-08-02
JPH08296148A1996-11-12
Other References:
See also references of EP 1788146A4
Attorney, Agent or Firm:
Hiraki, Yusuke (3-20 Toranomon 4-chom, Minato-ku Tokyo 01, JP)
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