REINFORCING FIBER BASE MATERIAL, PREFORM, COMPOSITE MATERIAL, AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a reinforcing fiber base material so structured that gaps which are formed between unidirectional base materials in case of arranging the base materials in parallel are kept at suitable intervals until a stage of a molded product and further high flexibility thereof is maintained, even when two or more of the unidirectional base materials are piled up and formed into a shape a laminate. SOLUTION: This reinforcing fiber base material contains at least two pieces of the unidirectional base materials, wherein each of the base materials retains a planar shape by being formed in such a manner that two or more reinforcing fiber threads which are tightened and arranged in parallel in one direction are bound by auxiliary yarn which is stretched and positioned so as to cross the reinforcing fiber threads. Further, the unidirectional base materials each having edge parts parallel to the direction of the reinforcing fiber threads are together linked by joining means in areas of the edge parts, without overlapping one another. COPYRIGHT: (C)2006,JPO&NCIPI