▎ 摘　　要

NOVELTY - A pitch-type carbon short fiber filler has graphene sheet closed in filler end surface as observed by transmission electron microscope, average fiber diameter (D1) of 12-20 mu m as observed by optical microscope and flat surface as observed by scanning electron microscope. The fiber diameter distribution (S1) of 100 fractions with respect to average fiber diameter (D1) is 3-20%. USE - Pitch-type carbon short fiber filler for resin composition used for molded products for heat radiation material, electromagnetic wave-shielding material and heat exchanger (all claimed). ADVANTAGE - The pitch-type carbon short fiber filler has excellent moldability, electromagnetic wave-shielding effect and thermal conductivity. The pitch-type carbon short fiber filler is manufactured economically with high yield.