Is superior in mechanical efficiency revelation extend to the longitudinal

摘要

It provides a kind of for manufacturing carbon fiber bundle fiber-reinforced resin with high characteristic. Specifically, providing a kind of carbon fiber bundle carbon fiber is 5900 MPa of a lea strength or more by carbon single-fiber, tow elasticity modulus is 250 to 380GPa according to ASTM method, the 900N/mm2 of knot strength or more. Each carbon single fiber extends simple optical fiber along its longitudinal direction without its on any uneven surface body structure surface again and the length is 0.6 μm or longer, but there is non-uniform structure, wherein the difference in height (between) to form single fiber be 5 to 25nm for the highest points RPV (peak value) and minimum point (paddy) surface, be 2 to 6nm with mean roughness (drawing). It is 1. that the cross section, which has a single fiber length/width ratio,00 to 1.01 mass and single fiber 0.042mg/m per unit lengths are 0.030.