Carbon fiber-reinforced composite material

Abstract

[Problem to be solved] An object of the present invention is to provide a CFRP in which the risk of edge glow is decreased without relying on expensive electroconductive particles. The gist of the present invention is to provide a carbon fiber-reinforced composite material including carbon fiber sheets including unidirectionally arranged carbon fibers and laminated multidirectionally one on another, the composite material being impregnated with a matrix resin, which is cured, and having an electroconductivity in the thickness direction of 10 S/m or more, wherein, when a region in which the carbon fibers have the same angle of fiber orientation consecutively in the thickness direction is defined as a Layer, the carbon fiber sheet includes at least one Layer that simultaneously satisfies the following (1) to (3) (the Layer is referred to as “Specific Layer”), and at least one low Vcf domain in the Specific Layer contains a particle(s): (1) the thickness of the Layer is 150 μm or more; (2) the mean value of the carbon fiber volume content factor, Vcf, of the Layer is 50%) or more; and (3) a low Vcf domain(s) having a Vcf of 0.5 or less, when the mean value of the Vcf is defined as 1, is/are included in the surface layer(s) and in the inner layer of the Specific Layer.

Dependencies are inferred from the claim text.