Composites are potential substitutes for metals as the materials used for heat spreaders in specified devises. They have a
lot of advantages comparing to conductors, but it is not trivial to manufacture product meeting all of expectations. Main
task is to choose the filler and the matrix properly and make them work efficiently. Lately, hope is reposed in carbonbased
nanoparticles due to their great features. They are good heat conductors and rather easy to manufacture. There is
wide range of materials which can be used as matrix according to their cheap processing, light weight, durability and
good chemical affinity to some substances. Polymers are among them. There are being conducted some researches on
different compounds. Expected characteristics depend on the application. FEM simulations has been carried out to
confirm these theories and results are presented in this paper.