PREPREG BASE MATERIAL, LAYERED BASE MATERIAL, FIBER-REINFORCED PLASTIC, PROCESS FOR PRODUCING PREPREG BASE MATERIAL, AND PROCESS FOR PRODUCING FIBER-REINFORCED PLASTIC

摘要

A prepreg base material which comprises many reinforcing fibers arranged in one direction and a matrix resin present among the many reinforcing fibers. The prepreg base material has, throughout the whole surface, many incisions each extending in a direction crossing the reinforcing fibers, substantially all of the reinforcing fibers having been divided by one or more of the incisions. The reinforcing fiber segments formed by division by the incisions have a length (L) of 10-100 mm. The prepreg base material has a thickness (H) of 30-300 µm, and the content by volume (Vf) of the reinforcing fibers in the prepreg base material is 45-65%.