Patent ID: 8329293

Claim:
A carbon fiber composite material having an elastomer and vapor-grown carbon fibers dispersed in the elastomer, the vapor-grown carbon fibers being rigid fibers having an average diameter of 20 to 200 nm, an average length of 5 to 20 micrometers, and an average value of bending indices defined by the following expression (1) of 5 to 15, Bending index= Lx÷D (1) Lx: length of linear portion of the vapor-grown carbon fiber, and D: diameter of the vapor-grown carbon fiber, and the carbon fiber composite material having a dynamic modulus of elasticity (E′) at 150° C. of 30 MPa or more and an elongation at break (EB) of 140% or more, wherein an amount of the vapor-grown carbon fibers in the carbon fiber composite material is 15 to 60 wt %.