| (19) |
 |
|
(11) |
EP 0 383 614 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
12.06.1991 Bulletin 1991/24 |
| (43) |
Date of publication A2: |
|
22.08.1990 Bulletin 1990/34 |
| (22) |
Date of filing: 16.02.1990 |
|
| (51) |
International Patent Classification (IPC)5: D01F 9/145 |
|
| (84) |
Designated Contracting States: |
|
DE FR |
| (30) |
Priority: |
16.02.1989 JP 35008/89
|
| (71) |
Applicant: NIPPON OIL COMPANY, LIMITED |
|
Tokyo (JP) |
|
| (72) |
Inventors: |
|
- Uemura, Seiichi
Ota-ku,
Tokyo (JP)
- Ido,Yasuzi
Hodogaya-ku,
Yokohama-shi,
Kanagawa-ken (JP)
- Sohda, Yoshio
Nakahara-ku,
Kawasaki-shi,
Kanagawa-ken (JP)
|
| (74) |
Representative: Smaggasgale, Gillian Helen et al |
|
Mathys & Squire,
100 Grays Inn Road
London WC1X 8AL
London WC1X 8AL (GB) |
|
| |
|
| (54) |
Process for producing carbon fiber fabrics |
(57) A carbon fiber fabric is produced by making carbon fibers having a tensile strength
exceeding 250 kgf/mm² and an elongation to break of 0.4% to 10% into a two- or three-dimensional
fabric, said carbon fibers having been obtained by melt-spinning a carbonaceous pitch,
making the resulting fibers infusible and then subjecting the thus-infusiblized fibers
to a primary heat treatment at a temperature exceeding 650
oC and not higher than 2,500
oC, and subjecting said two- or three-dimensional fabric to a secondary heat treatment
at a temperature which is not lower than 700
oC and is higher than the temperature used in said primary heat treatment.