| abstract |
A pitch-based carbon fiber filler capable of obtaining a heat dissipation material having high heat dissipation is provided. A mesophase pitch is used as a raw material, an average fiber diameter is 2 to 20 μm, a fiber diameter dispersion percentage (CV value) with respect to the average fiber diameter is 5 to 15, and an average fiber length is 10 to 700 μm. The graphene sheet is closed in the filler end face observation with a transmission electron microscope, the observation surface with a scanning electron microscope is substantially flat, the true density is 2.1 to 2.3 g / cm 3, and the surface pH Is a pitch-based carbon fiber filler having a pH of 6.0 to 8.0. Moreover, a composition and a molded object are produced using this carbon fiber filler. [Selection figure] None |