Patent ID: 9676936
Date: 2017-06-13
CPC Classifications: C08J,C08L

Claim:
1. A prepreg, comprising at least the following materials [A] to [C], wherein 90% or more of the material [C] is present inside a region of the prepreg that extends from any surface of the prepreg to a prepreg site having, from the surface, a depth of 20% of the thickness of the prepreg: a reinforcement fiber [A], a thermosetting resin [B], and thermoplastic resin particles [C] which are insoluble in the thermosetting resin [B], which comprise at least one polyamide polymer having crystallinity and at least one non-crystalline polyamide polymer wherein the ratio by mass of the crystalline polymer to the non-crystalline polymer ranges from 7/3 to 1/19, and which satisfy the following (i) and (ii): (i) the storage elastic modulus G′ of the material constituting the particles is more than 1 MPa, and 70 MPa or less at 180° C., and (ii) the ratio of the storage elastic modulus G′ of the material constituting the particles at 160° C. to the storage elastic modulus G′ of the material at 200° C. ranges from 1 to 5.