Title:
CARBON FIBER, AND ITS PRODUCTION AND PRODUCTION APPARATUS
Document Type and Number:
Japanese Patent JP3722323
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a raw fiber for producing a carbon fiber free from the breaking of a connecting part or burning out in a flame resistance-imparting process by connecting both the terminal parts of bundles of precursor fibers having a large number of filaments to each other through a connecting medium which is non-exothermic at a flame resistance-imparting temperature and through entanglement at a single filament level.
SOLUTION: The objective raw fiber for producing a carbon fiber is obtained by connecting both the terminal parts of a bundle of precursor fibers having the filament number of ≥30,000 to each other through a connecting medium (e.g. a flame resistant fiber) which is non-exothermic at a flame resistance- imparting temperature [a calorific value determined by a DSC method (a differential scanning calorimetry) at the flame resistance-imparting temperature is ≤500cat/g] and by entanglement at a single filament level e.g. by a fluid treatment, especially a high speed fluid treatment.
Inventors:
Kousuke Yoshimura
Toshihide Sekito
Makoto Endo
Toshihide Sekito
Makoto Endo
Application Number:
JP4725597A
Publication Date:
November 30, 2005
Filing Date:
February 14, 1997
Export Citation:
Assignee:
TORAY INDUSTRIES,INC.
International Classes:
B65H69/06; D01F9/12; D01F9/22; D01F6/18; (IPC1-7): D01F9/12; D01F6/18; D01F9/22
Domestic Patent References:
| JP61282428A | ||||
| JP60002407B1 | ||||
| JP1012850B2 | ||||
| JP56037315A | ||||
| JP58208420A | ||||
| JP4214414A |
Attorney, Agent or Firm:
Toshimitsu Ban
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