| (19) |
 |
|
(11) |
EP 0 100 410 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
25.03.1987 Bulletin 1987/13 |
| (43) |
Date of publication A2: |
|
15.02.1984 Bulletin 1984/07 |
| (22) |
Date of filing: 01.06.1983 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
| (30) |
Priority: |
09.06.1982 JP 9775682
|
| (71) |
Applicant: TORAY INDUSTRIES, INC. |
|
() |
|
| (72) |
Inventors: |
|
- Hiramatsu, Toru
()
- Higuchi, Tomitake
()
- Mitsui, Shigeo
()
|
|
| |
|
| (54) |
High strength and high elongation carbon fiber bundle and process for producing the
same |
(57) A high strength and high elongation carbon fiber bundle. It has a strength and an
elongation of about 420 to 650 kg/mm
2 and about 1.7 to 2.5%, respectively, when measured according to the strand tensile
test method as stipulated in JIS-R-7601, the broken ends of the carbon fibers protrude
beyond the broken surface of the test piece used in said strand tensile test, and
the protrusion length is about 1.0 to 5.0 times the monofilament diameter of the carbon
fiber.