1. Laboratory for Characterization and Processing of Polymers Institute of Textile Chemistry, Ecology and Colour Science, Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, SloveniaTel.: , Fax:
2. Department of Textiles, Faculty of Natural Sciences and Engineering, University of Ljubljana, Snežniška 35, 1000 Ljubljana, Slovenia