Title:
CARBON FIBER BUNDLE AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2023/042597
Kind Code:
A1
Abstract:
According to the present invention, a carbon fiber composite material, which has excellent energy absorption and is composed of a carbon fiber having high strength and high elongation, is provided by a production method yielding an excellent production amount. This carbon fiber bundle having a plurality of single fibers has a strand elastic modulus of 260-350 GPa, a strength of 6.5-8.5 GPa, an elongation of at least 1.8%, a filament number of 1,000-9,000, and a total fineness of 0.15-0.35 g/m, wherein the average value of major axis/minor axis ratios in single fiber cross sections is 1.01-1.08, the coefficient of variation is 1-4%, and the skewness is 0.3-1.2.
Inventors:
SUGA YUKI (JP)
TANAKA FUMIHIKO (JP)
WATANABE JUN (JP)
TANAKA FUMIHIKO (JP)
WATANABE JUN (JP)
Application Number:
PCT/JP2022/031179
Publication Date:
March 23, 2023
Filing Date:
August 18, 2022
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D01F9/22; D01F6/18
Domestic Patent References:
| WO2021090641A1 | 2021-05-14 | |||
| WO2016068034A1 | 2016-05-06 |
Foreign References:
| JP2021059829A | 2021-04-15 | |||
| JP2017128838A | 2017-07-27 | |||
| JP2002294518A | 2002-10-09 | |||
| JP2002069754A | 2002-03-08 | |||
| JPH11269727A | 1999-10-05 | |||
| JPS58191244A | 1983-11-08 | |||
| JP2017137614A | 2017-08-10 | |||
| JP2015067910A | 2015-04-13 | |||
| JP2021059829A | 2021-04-15 |
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