| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide carbon fibers which give a composite material exhibiting a high strength and the like, when combined with a resin to produce a carbon fiber-reinforced composite material, prevents the formation of fuzzes on the production of the composite material, and prevents the peeling of the obtained composite material. <P>SOLUTION: There are provided the carbon fibers having a strand elastic modulus of 290 to 350 GPa, a surface oxygen concentration ratio O/C of 10 to 25%, an adhesion amount of sizing agent of 0.4 to 1.7 mass%, a widening rate of a strand under tension of not more than 135 tex/mm, and an initial wettability A (mN/tex) by a dynamic measurement of a range of -1.3×10<SP>-4</SP>≥A≥-6.5×10<SP>-4</SP>. <P>COPYRIGHT: (C)2010,JPO&INPIT |
