Effects of Processing Variables on the Properties of Cotton Knitting Yarns

Abstract

The effects of carding rate. total spinning draft, spindle speed, and other production variables on the strength, uni formity, and lint-shedding tendencies of ring-spun cotton knitting yarns were determined. The results showed that higher carding rates improved fiber orientation and produced stronger, more uniform yarns; however, neps in the yarn were increased. Increasing total spinning draft also produced stronger, more uniform yarns. Lower spindle speeds resulted in slightly stronger, more uniform yarns with fewer neps and other imperfections. Optimum conditions for minimum lint shedding during knitting were obtained with lower carding rates and higher total spinning drafts and spindley speeds. Other processing variables that favored reduced lint shedding were combing using double-creded roving, and increasing yarn twist.