Abstract: Brand of para-aramid fiber, patented by DuPont called Kevlar. According to Mulkern and Raftenberg, “This material has a high strength (several times stronger than steel)” (2002, 13). For the first time Kevlar was obtained in 1964 by the research team Stephanie Kwolek (Hancox, 1993, 312). A production technology has been finalized a year later. However, commercial production of Kevlar began only in 1970 (Chaos.org.uk, 2015). The high strength and good thermal properties are the two most important qualities that are characteristic for Kevlar fibres (Brody, 1994, 113). The study of synthetic fiber’s features such as Kevlar is a very important practice today. Therefore, this work has relevance to modern scientific base.