Effect of Slub Parameters on Yarn Unevenness, Hairiness and Strength Properties of Slub Yarns

In this study yarn unevenness, diameter variation, hairiness and strength properties of slub yarns with various slub structures were investigated. The yarns (Ne20) in different slub thickness (1.2, 1.4, 1.6 and 1.8), slub length (1 - 3, 5 - 7 and 10 - 12 cm.), slub frequency (0.5, 3 and 6 pcs/m) and slub ramp length (1, 2 and 4 cm.) were produced from PET fibers. The multipopulation slub yarn, which has two-slub length, was also spun. The measurements of the yarns were made on the Fancy Yarn Profile of the Uster Tester 5 and the Uster Tensojet devices. The values of the test result were analyzed and evaluated statically. The slub parameters were found to have a significant effect on the unevenness and strength properties of the yarns. As the slub thickness, slub length and frequency increased, the yarn unevenness, hairiness increased and the yarn strength decreased. Medium ramp length was found suitable for higher breaking strength and elongation of the slub yarns and it was determined that the number of population was found statistically significant for these properties.