Title:
ACRYLIC YARN AS THICK CARBON FIBER PRECURSOR AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2000/077282
Kind Code:
A1
Abstract:
A method for producing an acrylic yarn as a precursor of a thick carbon fiber wherein an acrylonitrile polymer is spun out and then the resultant swollen yarn is dried to produce a fine yarn, characterized in that the width of a yarn is controlled by introducing an swollen yarn (1) by using a roll (2) having striae (3), to thereby produce a thick yarn having a total fineness of 22,000 dtex or more. The method can be employed for producing an acrylic yarn as a precursor of a thick carbon fiber which can provide a high quality carbon fiber being free from problems of the irregularity in strength in the longitudinal direction thereof and the like, even when the yarn is a precursor of a thick carbon fiber having a large total fineness.
Inventors:
IKEDA KATSUHIKO
MAKISHIMA TOSHIHIRO
FUKUEN NOBUYUKI
MAKISHIMA TOSHIHIRO
FUKUEN NOBUYUKI
Application Number:
PCT/JP2000/003844
Publication Date:
December 21, 2000
Filing Date:
June 14, 2000
Export Citation:
Assignee:
MITSUBISHI RAYON CO (JP)
International Classes:
D01F6/18; D01F9/22; (IPC1-7): D01F6/18; D01F9/22; D01D5/06
Foreign References:
| JPH10251924A | 1998-09-22 | |||
| JPH05195313A | 1993-08-03 | |||
| JPH05140815A | 1993-06-08 | |||
| JPH1112874A | 1999-01-19 |
Attorney, Agent or Firm:
Kaneda, Nobuyuki (Akasaka 1-chome Minato-ku Tokyo, JP)
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