FIBER-REINFORCED COMPOSITE MATERIAL

摘要

A fiber-reinforced composite material is provided which is capable of achieving CAI, ILSS, and interlaminar fracture toughness concurrently at high levels, in particular, capable of achieving high CAI. The composite material is composed of a laminated body including a plurality of reinforcing-fiber-containing layers and a resin layer in each interlaminar region between adjacent reinforcing-fiber-containing layers, wherein the resin layer is a layer wherein a cured product of a compound having in its molecule a benzoxazine ring represented by formula (1) and epoxy resin is impregnated with at least polyamide 12 powder:
(R 1 : C1-C12 chain alkyl group or the like; H is bonded to at least one of the carbon atoms of the aromatic ring at ortho- or para-position with respect to C to which the oxygen atom is bonded)
wherein a ratio in thickness of each resin layer to each reinforcing-fiber-containing layer is 1 : 2 to 6.