The clothing is not worn only for protecting the human body, but it helps to obtain comfort during high level activities or in unfavorable environmental conditions. Heat generated by the working human body in hot climate or high physical activity, which must be dissipated to the environment. Similarly, in the cold environment, the body is going to be shielded from cold feeling. Thermophysiological clothing comfort related to warmth and moisture transport behaviour of clothing. Good clothing helps to maintain body temperature during various level of physical activities and surrounding environmental condition. Therefore, some improved functional properties are desirable in the clothing. For clothing comfort, thermophysiological comfort properties of fabrics which are related to heat and moisture transport properties play very vital role. These properties can be introduced in the clothing by using various fibrous material and modifying the structure of yarns, fabrics and garments.
In the present study impact of structural variations on pre-hollow/micro-porous yarn's tensile and physical properties were investigated in view of their processing and ultimate product quality. The results show that: the core pre-hollow yarns and doubled pre-hollow yarns possessing continuous polyvinyl alcohol (PVA) filaments are better in tensile behavior than blended pre-hollow yarns which contain discrete PVA staple fibers. The doubled pre-hollow yarns were found to have the lowest unevenness, thick places, thin places and total imperfections followed by blended pre-hollow and core pre-hollow yarns, while blended pre-hollow yarns showed lowest number of neps. The core pre-hollow yarns exhibit lowest hairiness followed by blended pre-hollow yarns and doubled pre-hollow yarns. Use of double roving during spinning is beneficial for improving yarn strength, unevenness imperfections and hairiness in all the pre-hollow yarns.
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