Effect of Test Speed and Twist Level on the Hairiness of Worsted Yarns

摘要

This paper examines the effect of test speed and yarn twist level on the bairiness of worsted yarns. Pure wool yarns of three different twist levels are spun on a worsted ring frame, then tested for fairiness on the hairiness attachment to a Uater Tester 3 at three speeds of 25, 100, and 400 m/min. The results indicate tat regardless of the yarn's twist level, yarn hairiness tested at 400 m/min is higher than that obtained at 25 and 100 m/min, and the difference is statisticaly significant at the 5 signficance level. But there is no statistically significant difference between hairiness results obtained at 25 and 100 m/min. In addition, yarn hairiness readings in single measurements follow a lognormal distribution.