Patent ID: 8741198

Claim:
A process for producing a fiber reinforced resin which comprises: placing in the following order at least a reinforcing fiber substrate, a resin distribution medium, an interlayer having a cover factor of 90%-100% and comprising at least one woven fabric and a substrate for a skin layer, wherein a ratio of (a) a coefficient of impregnation of the resin distribution medium to (b) a coefficient of impregnation of the substrate for the skin layer is 1.5-10, in a cavity of a mold, wherein a core material is on at least one surface side of said resin distribution medium, and a resin flowable substrate layer with a thickness of 50-2,000 μm is provided extending outward beyond at least an end portion of a resin injection side of said core material, wherein a coefficient of impregnation of said resin flowable substrate layer is 1×10 −10 m 2 or more, injecting a resin into said cavity, and curing said resin.