Title: Multifunctional technical nonwoven and knitted
textiles, composites and yarns and Processes
Project funding: Croatian Ministry of Science, Education and Sports
Code: 117-0000000-2984
Project Leader: Prof. Zenun Skenderi, Ph.D.
Topic 1.4 Comfort of textile and heat
Combed yarns of various materials were made in fineness of 12, 14, 17 and 20 tex, as well as single jersey knitted fabric. On the produced samples parameters of the yarn were examined (fineness, twist, unevenness, tensile properties, surface friction and hairiness) and structural parameters of knitted fabrics were examined (horizontal and vertical density, weight, thickness). Investigation of dependence of these parameters and thermal properties of the product showed that among the yarn parameters the greatest impact on the transfer of heat through the knitted structure has a fineness, thickness and weight variation.
Among the parameters of knitted fabric the greatest impact have fabric weight, thickness and porosity of knitted material. Examination of raw and finished fabrics on the device for measuring the resistance of the material on transfer of the heat and water vapor showed that the finished fabric allows more heat transfer, which is caused by the changing structure of the fabric after finishing. Comparison of materials made of fibers with different cross-section showed that the use of polyester fibers with a profiled cross-section reduces heat and water vapor transfer.
Investigation of comfort was performed also by measuring subjects with the termovision camera. The results of subjective evaluation of heat, moisture and comfort in three environment conditions show a decrease of feelings of comfort and increase of feeling of heat and humidity with increasing temperature. On the temperature of 32oC sweat absorption in fabric is three times greater than at temperature 23oC.
During the second year of working on the project, research was extended to conservation of energy in the production of polymers.
