| Abstract [eng] |
Cut resistant knitted materials used in work safety clothing market perform one major function - reduce the risk of injury by sharp surfaces and tools, however, they are frequently very rigid, thick, non elastic or fibre composition of yarn does not allow assuring comfortability to touch these, therefore, additional layers of fabric, i.e. linings shall be used. Though additional layers of fabric protect skin against potential irritation, however these make the item thicker. In this work was created 18 different combinations of three-layer cut resistant knitted materials where every layer has different purpose. Research of cut resistant material was performed by standardized cutting machine. The research reflected that the best cut resistant are materials M1 and M2 which are fabricated with high molecular mass polyethylene HPPE, para-aramid Kevlar, 0.05 mm thickness steel wire and PES Coolpus yarn. Standardized puncture test has also been made, which identified that materials M1, M2, M15-M18 are the most resistant to punctures. Especially high ductility have M9 and M10 three-layer knitted materials. Ductility is very important during product wearing. High mechanical resistance knitted material used in the safety clothing market shall not lose the characteristics such as elasticity, ductility and softness. KTU-Griff-Tester helped to determine this characteristics. The best results were achieved with material M4 though Kevlar yarn is used in all of its three layers meanwhile PES Coolplus yarn could be used for bottom layer of the material which do not make discomfort at the direct contact with skin during wearing. Test results reflected that event five newly created three-layer cut resistant knitted materials have the characteristics of highest cut resistant level (Level 5 based on LST EN:388), they are ductility and comfortable during wearing also. The work was presented in an exhibition/competitini for young scientists „Technorama 2015“. |
