| abstract |
(57) [Summary] [PROBLEMS] To exhibit particularly excellent fatigue resistance against stress deformation such as elongation / compression deformation, bending deformation, bending / extension deformation, and can be suitably used for industrial materials such as tires, belts and hoses. To provide rubber reinforcement cords. A carbon fiber bundle having a breaking elongation of 1.7% or more is provided. A rubber reinforcing cord impregnated with a resin composition containing an isocyanate derivative. |