RESIN FILLED FIBER BASE MATERIAL, FIBER REINFORCED COMPOSITE MATERIAL AND METHOD FOR PRODUCING SAME

The purpose of the present invention is to prevent the occurrence of voids and to improve fixation force between reinforcing fibers and a matrix resin that is composed of a thermoplastic resin, thereby enhancing mechanical characteristics such as strength and elastic modulus with respect to a fiber reinforced composite material which is molded with use of a fiber base material, while using a thermoplastic resin as the matrix resin. A resin filled fiber base material, which is obtained by filling the spaces among fibers of a fiber base material with a thermoplastic polyurethane, and which is configured such that the amount of the thermoplastic polyurethane applied to the fiber base material is from 25 parts by mass to 100 parts by mass (inclusive) relative to 100 parts by mass of the fiber base material in terms of solid content. 本发明的目的在于，在将使用纤维基材而成型的热塑性树脂作为基体树脂的纤维强化复合材料中，防止孔隙的产生，提高强化纤维与热塑性树脂的基体树脂的固定力，提高强度及弹性模量等力学特性。一种树脂填充纤维基材，其通过在纤维基材的纤维间的空间中填充热塑性聚氨酯而构成，相对于100质量份的纤维基材，以固体成分换算，热塑性聚氨酯向纤维基材的赋予量为25质量份以上且100质量份以下。