1. Lublin University of Technology, Faculty of Mechanical Engineering, Department of Polymer Processing , 20-618 Lublin , 36 Nadbystrzycka Str. , Poland
2. Technical University of Kosice, Faculty of Mechanical Engineering, Department of Technologies, Materials and CAx , 042 00 Kosice , 74 Masiarska Str. , Slovakia
3. Technical University of Kosice, Faculty of Mining, Ecology, Process Control and Geotechnology, Department of Logistics and Transport , 042 00 Kosice , 9 Letna Str. , Slovakia
4. Lviv Polytechnic National University, Department of Chemical Technology of Plastics , 79013 Lviv , 12 Bandera Str. , Ukraine