PREPREG LAMINATE, METHOD FOR MANUFACTURING FIBER-REINFORCED PLASTIC USING PREPREG LAMINATE, AND FIBER-REINFORCED PLASTIC

摘要

A prepreg laminate having a woven fabric prepreg on at least one surface layer and having a discontinuous fiber prepreg, wherein the woven fabric prepreg includes reinforced fibers R₁ with a woven structure and a thermosetting resin A, the discontinuous fiber prepreg includes discontinuous reinforced fibers R₂ oriented in one direction and a thermosetting resin B, and the thermosetting resin A and thermosetting resin B satisfy a calorific value condition. Calorific value condition: When temperatures of the thermosetting resin A and thermosetting resin B are each raised by means of a differential scanning calorimetry analyzer to 130°C in a nitrogen atmosphere at 50 to 700°C/min and kept at 130°C until the end of a thermosetting reaction, Tb-Ta30, where Ta(s) is the time until the calorific value of the thermosetting resin A reaches 50% of the total calorific value of the thermosetting resin A and Tb(s) is the time until the calorific value of the thermosetting resin B reaches 50% of the total calorific value of the thermosetting resin B. Based on the above, provided are the prepreg laminate exhibiting less irregularity in the texture of the woven structure during forming even when combining the woven fabric prepreg and discontinuous fiber prepreg, a fiber-reinforced plastic that has a pleasing appearance and is suitable as an external panel member, and a method for manufacturing the fiber-reinforced plastic.