Invention Grant
- Patent Title: Carbon fiber bundle, prepreg, and fiber-reinforced composite material
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Application No.: US17943658Application Date: 2022-09-13
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Publication No.: US11746445B2Publication Date: 2023-09-05
- Inventor: Shuhei Yoshida , Hidekazu Yoshikawa , Yosuke Nakamura , Hironori Kawamoto , Takaya Suzuki , Toru Kaneko
- Applicant: Teijin Limited , Teijin Carbon Europe GmbH
- Applicant Address: JP Osaka
- Assignee: TEIJIN LIMITED,Teijin Carbon Europe GmbH
- Current Assignee: TEIJIN LIMITED,Teijin Carbon Europe GmbH
- Current Assignee Address: JP Osaka; DE Wuppertal
- Agency: Sughrue Mion, PLLC
- Priority: JP 17231749 2017.12.01 JP 18207301 2018.11.02
- The original application number of the division: US16768370
- Main IPC: D01F9/22
- IPC: D01F9/22 ; C08J5/24
Abstract:
An object of the present invention is to provide a carbon fiber which exhibits excellent strength development rate when used in a composite material. The present invention that solves the problems is a carbon fiber which simultaneously satisfies the following formulae (1) and (2):
Lc/d≤3 (1)
TS×d×Lc>6.0×105 (2)
wherein:
Lc is an X-ray crystallite size (Å),
d is a filament diameter (μm), and
TS is a strand tensile strength (MPa).
Lc/d≤3 (1)
TS×d×Lc>6.0×105 (2)
wherein:
Lc is an X-ray crystallite size (Å),
d is a filament diameter (μm), and
TS is a strand tensile strength (MPa).
Public/Granted literature
- US20230017814A1 CARBON FIBER BUNDLE, PREPREG, AND FIBER-REINFORCED COMPOSITE MATERIAL Public/Granted day:2023-01-19
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