| 摘要 |
Three dimensional woven fabrics-containing, at least as one component thereof, the carbon fibers obtained by thermosetting treatment and carbonization treatment carried out after melt-spinning of high softening point pitch and having a tensile strength of 15 -250 Kgf/mm2, elongation of 0.5 -8.0% and modulus of elasticity of 400 -40,000 Kgf/mm2 and a capability of increasing both of their tensile strength and modulus of elasticity to 1.1 times or more of the values before additive heattreatment by way of the additive heat-treatment carried out under a relaxed state of the said carbon fibers are provided, whereby carbon fibers having a tensile strength of 150 Kgf/mm2 or more and a modulus of elasticity of 40,000 Kgf/mm2 or more are attained. They are superior in abrasion-resist-ing property, flexion-resisting property and scratchresisting property and useful as one component of fiber composite materials in reinforcing plastics,metals, cements, ceramics, carbon materials, etc. |
