Effects of Filament Modulus and Linear Density on the Properties of Air-Jet Textured Yarns

The effect of filament initial modulus on textured yarn properties is studied, keeping other parameters constant. Initial modulus has a major influence on textured yarn properties. An increased initial modulus causes poor texturizability and therefore in ferior textured yarn properties such as poor bulk, stability, loop frequency, and higher nep level. A study of the effect of filament linear density on textured yarn properties shows that finer filaments produce better quality yarns as far as loop frequency, bulk, and instability values are concerned, but they also produce higher numbers of neps in the textured yarn.