Impact of taker-in speed on the characteristics of ring-spun yarn

In this study, experiments were carried out to determine to what extent the card sliver and final yarn quality were altered by a gradual increment in the speed of the taker-in roller on the carding machine. The speeds of the taker-in roller have been determined as 1200 rpm, 1400 rpm and 1600 rpm, respectively. The operating parameters of the carding machine and other equipment in the yarn production line were kept constant. Fibre breakage, neps removal efficiency, and defect index of samples have been measured by the AFIS PRO2 laboratory instrument. The characteristics of ring spun yarn (17.35 tex) were tested on a Uster Tester-5 (UT-5) laboratory device. Research results revealed that the enhancement of taker-in speed led to increased fibre breakage due to the greater impact force on the cotton fibre. This elevates the number of short fibres in the material and also negatively affects the final yarn properties including unevenness (U%), imperfection index (IPI), ultimate yarn strength (cN/tex), and hairiness index (H-value).