(19)
(11) EP 0 458 765 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.04.1993 Bulletin 1993/14

(43) Date of publication A2:
27.11.1991 Bulletin 1991/48

(21) Application number: 91830214.2

(22) Date of filing: 22.05.1991
(51) International Patent Classification (IPC)5: D01F 9/145, D01F 8/18
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 22.05.1990 JP 131860/90

(71) Applicants:
  • Tanaka Kikinzoku Kogyo K.K.
    Chuo-ku Tokyo (JP)
  • The Agency of Industrial Science and Technology
    Chiyoda-ku Tokyo-to (JP)

(72) Inventors:
  • Yamada, Yasuhiro c/o The Agency of Industr.
    Shuku-machi Tosu-shi, Saga (JP)
  • Honda, Hidemasa
    Tokyo (JP)
  • Yamasaki, Haruki c/o Isehara Factory of
    Isehara-shi Kanagawa (JP)
  • Shimizu, Susumu c/o Tanaka Kikinzoku Kogyo K.K.
    Chuo-ku Tokyo (JP)

(74) Representative: Pellegri, Alberto et al
c/o Società Italiana Brevetti S.p.A. Via Puccini, 7
21100 Varese
21100 Varese (IT)


(56) References cited: : 
   
       


    (54) Carbon short fiber and process for preparing same


    (57) Disclosed herein is carbon carbon short fiber characterized in that the fiber is made of one of those consisting of pitch-type optically isotropic carbon fiber, pitch-type optically anisotropic carbon fiber and the composite carbon fiber, and is cotton-like.
    The carbon short fiber is cotton-like, curls and is twisted so that it possesses bulkiness, elasticity and stretchability. Accordingly, the fiber by itself or in combination with metal, ceramices and the like may be utilized in various fields as the material having excellent characteristics.
    Also disclosed is a process for preparing same. The process attains considerable economic effects by elevating the productivity because the pitch may be directly spun to the fiber.






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