DUAL-CORE YARNS AND MEASUREMENT OF TWIST FOR DUAL-CORE YARNS

In present study, it was aimed to researchthe correlation of the results of two different twist measurement techniques,such as twist-untwist and optical systems, for dual core yarns (Polyester andElastane cores- cotton wrapping fibres). Dual-core yarns can be produced on themodified ring spinning machine in two different ways (pre-treated dual-core anddual-core yarn). Also 100% cotton ring counterparts of dual core yarns wereproduced for three different yarn counts. In the study, the twist values of theyarn samples were measured and then the results were evaluated by correlationanalysis. According to the correlation analysis between the twist results ofboth measurement techniques, the highest correlation in the positive way wasobserved from the ring yarn samples whereas lowest correlation was observedfrom the dual-core yarns.