High-density polyethylene-talc-carbon black composites were prepared with varying amounts of talc to determine its effect on the thermo-physical properties of the composites. Carbon black was added in a content of 3.5 wt. % because it was previously determined that the mechanical properties of the composites were depreciated at higher loadings. It was found that the addition of talc enhanced the mechanical properties, as well as the thermal conductivity, and thermal diffusivity. The ...