| (19) |
 |
|
(11) |
EP 0 276 840 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
07.08.1991 Bulletin 1991/32 |
| (43) |
Date of publication A2: |
|
03.08.1988 Bulletin 1988/31 |
| (22) |
Date of filing: 27.01.1988 |
|
| (51) |
International Patent Classification (IPC)4: D01F 9/145 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
28.01.1987 JP 17509/87
03.09.1987 JP 219224/87
|
| (71) |
Applicant: PETOCA Ltd. |
|
Chiyoda-ku,
Tokyo-to (JP) |
|
| (72) |
Inventors: |
|
- Suto, Yoshinori
cf. Kashima Seiyusho of
Kashimagun
Ibaraki-ken (JP)
- Nakajima, Hideyuki
cf. Kashima Seiyusho of
Kashimagun
Ibaraki-ken (JP)
- Ito, Toshiyuki
cf. Kashima Seiyusho of
Kashimagun
Ibaraki-ken (JP)
|
| (74) |
Representative: Kraus, Walter, Dr. et al |
|
Patentanwälte Kraus, Weisert & Partner
Thomas-Wimmer-Ring 15
D-80539 München
D-80539 München (DE) |
|
| |
|
| (54) |
Pitch-based carbon fibers and their production method |
(57) Pitch-based carbon fibers on which silicone type spin finish oils are remained in
the amount of 0.1 - 2.0% by weight of said fibers and having a stack height of graphitic
layers L
c (002) of 16 - 28Å, a graphitic interlayer spacing distance d002 of 3.46 - 3.49Å,
a tensile strength of 5 - 50 Kgf/mm² and an elongation of 0.3 - 8.0% are provided.
They show good cohesiveness and lubricity of bundles and superior in adaptation to
various kinds of processes.