PRE-PREG, FIBER-REINFORCED COMPOSITE MATERIAL, AND THERMOPLASTIC RESIN PARTICLES

摘要

The present invention addresses the problem of providing a pre-preg capable of producing a fiber-reinforced composite material exhibiting interlayer ductility and impact resistance characteristics that are superior and stable under a wide range of formation conditions. The present invention is a pre-preg comprising at least the following materials [A], [B], and [C], characterized in that 90% or more of [C] is present in a region extending from the pre-preg surface to a depth of 20% of the thickness of the pre-preg. [A]: reinforcing fibers [B]: a thermosetting resin [C]: thermoplastic resin particles which satisfy (i) and (ii) below, and which do not dissolve in the thermosetting resin [B]. (i) the storage modulus (G') of the material constituting the particles at a temperature of 180°C is 1-70 MPa (ii) the ratio of the storage modulus (G') of the material constituting the particles at a temperature of 160°C and the storage modulus (G') thereof at a temperature of 200°C is 1-5.