Abstract
This paper reports the tensile characteristics of cotton, polyester, viscose and polyester/viscose (P/V) ring and rotor yarns of different linear densities and blend proportions in dry and wet conditions. An experimental set-up has been fabricated, which can be attached with the tensile tester to study the tensile characteristics of yarns under water. The tenacity of yarns is found to be higher in wet condition as compared to that in dry condition for all the yarns, except the viscose yarns where tenacity drops in wet condition. The increase in tenacity in case of cotton is much higher than that in case of polyester and P/V blended yarns. In case of polyester and cotton, the breaking elongation of yarns increases while in viscose and viscose-rich P/V blended yarns, the breaking elongation decreases in wet condition. In viscose and viscose-rich P/V blended ring-spun yarns, the increase in initial modulus is found to be very high, whereas in the case of polyester and cotton, there is moderate increase in initial modulus of yarns in wet condition. In case of cotton ring-spun yarns, there is very high level of increase in work of rupture in wet condition. Yarn fineness significantly affects the tensile characteristics.
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