Effect of spinning conditions on physical properties of a composite yarn

This study investigated the effects of spinning conditions such as travelle r, twist multiplier, front top roller pressure and hardness on the physical properties of 19.7 tex Polyester/Rayon (P/R) composite yarns. Results show ed that a traveller of #1/0, twist multiplier of 2.8, front top roller pres sure of 18 kgf and hardness of 70 degrees are the optimum spinning conditio ns. This combination results in the best mixing of spreaded polyester filam ents and drafting rayon fibers in the nip of the front rollers, arranging t hem in the best dispersion to form a P/R composite yarn with better quality and good blend uniformity. The results also showed that the 19.7-tex compo site yarn spun in this study is superior to the world 5 % for standards of uniformity and hairiness. This indicates that the quality of P/R composite yarn has been remarkably improved.