Title:
METHOD FOR PRODUCING CARBON-FIBER BUNDLES
Document Type and Number:
WIPO Patent Application WO/2012/014892
Kind Code:
A1
Abstract:
Provided is a highly productive method for producing carbon-fiber bundles without deteriorating the quality of the carbon-fiber during the production process. Specifically provided is a method for producing carbon-fiber bundles involving a flame-proofing step, a pre-carbonization step, and a carbonization step, wherein: when P1 represents the travelling pitch of a fiber bundle during the flame-proofing step, P2 represents the travelling pitch of the fiber bundle during the pre-carbonization step, and P3 represents the travelling pitch of the fiber bundle during the carbonization step, the equation 0.8≤P2/P1≤1.0 and 0.4≤P3/P1≤0.8 is satisfied; when P11 represents the travelling pitch of the fiber bundle at the inlet of the heating processing section of a pre-carbonization furnace and P12 represents the travelling pitch of the fiber bundle at the outlet of the heating processing section of the pre-carbonization furnace, the equation 0.40≤(P12/P11)≤0.90 is satisfied; and when P13 represents the travelling pitch of the fiber bundle at the inlet of the heating processing section of a carbonization furnace and P14 represents the travelling pitch of the fiber bundle at the outlet of the heating processing section of the carbonization furnace, the equation 0.40≤(P14/P13)≤0.90 is satisfied.
Inventors:
TOKORO, Yasuhito (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
所 靖人 (〒93 広島県大竹市御幸町２０番１号 三菱レイヨン株式会社中央技術研究所内 Hiroshima, 〒7390693, JP)
所 靖人 (〒93 広島県大竹市御幸町２０番１号 三菱レイヨン株式会社中央技術研究所内 Hiroshima, 〒7390693, JP)
Application Number:
JP2011/066965
Publication Date:
February 02, 2012
Filing Date:
July 26, 2011
Export Citation:
Assignee:
MITSUBISHI RAYON CO., LTD. (6-41, Konan 1-chome Minato-k, Tokyo 06, 〒1088506, JP)
三菱レイヨン株式会社 (〒06 東京都港区港南一丁目６番４１号 Tokyo, 〒1088506, JP)
TOKORO, Yasuhito (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
三菱レイヨン株式会社 (〒06 東京都港区港南一丁目６番４１号 Tokyo, 〒1088506, JP)
TOKORO, Yasuhito (Mitsubishi Rayon Co. Ltd., 20-1, Miyukicho, Otake-sh, Hiroshima 93, 〒7390693, JP)
International Classes:
D01F9/32
Attorney, Agent or Firm:
MIYAZAKI, Teruo et al. (8th Floor, 16th Kowa Bldg. 9-20, Akasaka 1-chome, Minato-k, Tokyo 52, 〒1070052, JP)
Claims:
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