(19)
(11) EP 0 383 339 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
28.08.1991 Bulletin 1991/35

(43) Date of publication A2:
22.08.1990 Bulletin 1990/34

(21) Application number: 90103030.4

(22) Date of filing: 16.02.1990
(51) International Patent Classification (IPC)5: D01D 4/02, D01F 9/145
(84) Designated Contracting States:
DE ES FR GB IT NL

(30) Priority: 16.02.1989 US 311511

(71) Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
Wilmington Delaware 19898 (US)

(72) Inventors:
  • Jennings, Uel Duane
    Signal Mountain, Tennessee 37377 (US)
  • Ross, Roger Allen
    Chattanooga, Tennessee 37421 (US)

(74) Representative: Abitz, Walter, Dr.-Ing. et al
Patentanwälte Abitz & Partner Postfach 86 01 09
81628 München
81628 München (DE)


(56) References cited: : 
   
       


    (54) Improved pitch carbon fiber spinning process


    (57) Use of a ribbon shaped flow configuration at the entrance (15) to a round spinneret (10) used for spinning carbon fibers from mesophase pitch promotes the formation of random microstructure and prevents formation of axial cracking in the fibers.







    Search report