Physical Properties of Textured Polyester Yarns: The Influence of Texturing Temperatures

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Abstract
The temperature dependence of textured yarn physical properties has been determined for five polyester feeder yarns textured on two texturing machines. The data show that there are important effects on physical properties of varying texturing temperature, but that the extent and type of the effects depends on the feeder yarn-texturing machine combination. For the combinations studied, tenacity, basic elongation, crimp rigidity, crimp elongation, Leesona Skein Shrinkage, and the effective yarn temperature from Kanebo Thermal Stress Analyzer data showed significant dependence on texturing temperature for at least one feeder yarn. Neither denier nor initial modulus was texturing-temperature-dependent for any of these feeder yarns. The data also show that, in those instances where a property is texturing-temperature-dependent for more than one feeder yarn, the magnitude of the dependence ( i.e., the slope of the property versus texturing temperature curve) is similar for all feeder yarns affected. Therefore, these feeder yarns tend to have equal sensitivity to changes in texturing temperature, if they have any sensitivity at all.