1. Lublin University of Technology, Faculty of Mechanical Engineering, Department of Technology and Polymer Processing, 36 Nadbystrzycka St, 20-618Lublin,
2. Technical University of Kosice, Faculty of Mechanical Engineering, Institute Of Technology And Materials Engineering, Department of Computer Aided Technology, 74 Masiarska St, 04001Kosice, Slovakia
3. Lviv Polytechnic National University, Department of Chemical Technology of Plastics, 79013 Lviv, Ukraine, 12 S. Bandera str., Lviv, Ukraine