Prepreg, preform, and fiber-reinforced resin molded article

Abstract

Provided is a prepreg in which 5 to 65 parts by weight of a fiber sheet substrate is impregnated with 35 to 95 parts by weight of a resin, the fiber sheet substrate containing more than 50% by weight but 99% by weight or less of discontinuous carbon fibers (A) and 1% by weight or more but less than 50% by weight of discontinuous organic fibers (B) that are uniformly dispersed, wherein the prepreg satisfies any one of the following Conditions 1 to 3: Condition 1: the resin is a thermoplastic resin (C), and a difference between a melting point Tmb (° C.) of the organic fibers (B) and a melting point Tmc (° C.) of the thermoplastic resin (C) (Tmb−Tmc) is 20 to 200° C.; Condition 2: the resin is a thermosetting resin (D), and a difference between the melting point Tmb (° C.) of the organic fibers (B) and a curing temperature Tmd (° C.) of the thermosetting resin (D) (Tmb−Tmd) is 20 to 400° C.; and Condition 3: the organic fibers (B) have no melting point. A prepreg, a preform, and a fiber-reinforced plastic molded article, which have excellent moldability, mechanical properties, and impact strength, are provided.

Dependencies are inferred from the claim text.