CPC D01F 9/22 (2013.01) [C08J 5/248 (2021.05); C08J 2300/22 (2013.01); C08J 2300/24 (2013.01)] | 7 Claims |
1. A carbon fiber which simultaneously satisfies the following formulae (1), (2), (A), and (B):
Lc/d≤2.9 (1)
TS×d×Lc>6.0×105 (2)
75≤X-ray crystal orientation degree (%)≤81.9 (A)
1.72≤specific gravity (g/cm3)≤1.76 (B)
wherein:
Lc is an X-ray crystallite size (Å),
d is a filament diameter (μm), and
TS is a strand tensile strength (MPa),
and which satisfies:
the strand tensile strength of the carbon fiber is 4,700 MPa or more, and
the X-ray crystallite size of the carbon fiber is 19 to 21 Å.
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