Prepreg, method of manufacturing prepreg, and carbon fiber-reinforced composite material

摘要

The present invention relates to a sheet-form prepreg which comprises a plurality of carbon fibers and a matrix resin with which the plurality of carbon fibers are impregnated. This matrix resin contains a thermosetting resin, a curing agent, conductive particles of 1 μm or smaller in diameter, conductive particles of 5 μm or larger in diameter and thermoplastic resin particles, and the conductive particles of 1 μm or smaller in diameter, the conductive particles of 5 μm or larger in diameter and the thermoplastic resin particles are each disproportionately distributed in a specific part of the prepreg.;By the present invention, a prepreg from which a carbon fiber-reinforced composite material having both excellent impact resistance and good conductivity in the lamination direction can be produced is provided.

主权项

1. A prepreg, which is in the form of a sheet and comprises a plurality of carbon fibers and a matrix resin with which said plurality of carbon fibers are impregnated,
wherein, said carbon fibers are parallel in the form of a sheet; said matrix resin comprises a thermosetting resin, a curing agent, conductive particles and thermoplastic resin particles; said conductive particles include conductive particles of 1 μm or smaller in diameter and conductive particles of 5 μm or larger in diameter; said conductive particles of 5 μm or larger in diameter and said thermoplastic resin particles are disproportionately distributed in either or both surface layers of said prepreg in the thickness direction of said prepreg; and said conductive particles of 1 μm or smaller in diameter are disproportionately distributed interior to said carbon fibers that are arranged most closely to the respective principal surfaces of said prepreg in said thickness direction of said prepreg, wherein the mass ratio of the carbon fibers contained in the prepreg is 40 to 80%, and the mass of the carbon fibers per unit area of the prepreg is 100 to 300g/m2.