On 13.04.2017 L’udmila Dulebová from Technical University of Košice during the lecture Characterization of Mechanical and Thermal Properties of Polymer Composites dedicated to the members of NEWEX project presented about possibility of usage of mineral fillers to obtain new properties of polymer composites. She presented effect of mineral fillers Calcium carbonate and talc on main properties of polymer composite with PP matrix. Samples with different percentage of these fillers were prepared and basic mechanical and thermal properties were tested. She informed the members of NEWEX project with research results of testing polymer materials such as thermal conductivity, nucleation of PP and a change in modulus as a result of the change in crystallinity, impact strength, creep resistance, tensile strength, relative elongation and hardness.