CARBON FIBER AND COMPOSITE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a carbon fiber and a composite material having high performance and slight scattering of quality. SOLUTION: This carbon fiber has a surface in which average value of the intensity ratio I1480/I1580 measured by Raman spectrometry is 0.35 to 0.65 and <=5% coefficient of variation of the parameter in longitudinal direction. This composite material is constituted by using the carbon fiber as a reinforcing material.