▎ 摘　　要

NOVELTY - A heat-dissipating polymer composite material comprises a masterbatch obtained by mixing a thermoplastic polymer resin and thermal-conductive rubber containing pine tar gum and carbon nanotubes, 5-30 pts. wt. expanded graphite and 20-20 pts. wt. graphene nanoplates. The content of carbon nanotubes is 10-100 pts. wt. with respect to 100 pts. wt. thermoplastic polymer resin. The molded article formed from the polymer composite material has isotropic thermal conductivity of 2-50 W/m.K. USE - Heat-dissipating polymer composite material is used for heat sink used in LED electric lamp (all claimed). ADVANTAGE - The heat-dissipating polymer composite material has excellent mechanical property and moldability. The heat sink obtained using the polymer composite material is lightweight. DETAILED DESCRIPTION - A heat-dissipating polymer composite material comprises a masterbatch obtained by mixing a thermoplastic polymer resin and thermal-conductive rubber containing pine tar gum and carbon nanotubes, 5-30 pts. wt. expanded graphite and 20-20 pts. wt. graphene nanoplates. The content of carbon nanotubes is 10-100 pts. wt. with respect to 100 pts. wt. thermoplastic polymer resin. The molded article formed from the polymer composite material has isotropic thermal conductivity of 2-50 W/m.K. The isotropic thermal conductivity is calculated based on in-plane thermal conductivity of 3 W/mK or more and through-plane thermal conductivity of 1 W/mK or more. An INDEPENDENT CLAIM is included for manufacture of heat-dissipating polymer composite material.