Effect of Creep-Related Overdrying in Sizing on Warp Characteristics and Weaving Performance

Effects of creep-related overdrying during sizing on warp characteristics and weaving performance have been studied for a particular warp. During sizing, parameters such as moisture regain, warp stretch, and lease tension were monitored on a yard-to-yard basis at both normal and creep speeds. Yarn type and sizing agent were kept constant. Optimum levels of squeeze role pressure at both normal and creep speeds were determined before investigating the effect of overdrying on weaving performance. The results indicated that there is a critical pressure/speed combination at which yarn characteristics are optimum. The benefits of optimization were limited, however, by the effect of creep speed on the abrasion resistance of yarn. The effect of creep-related overdrying on weaving performance was determined by measuring the frequency of occurrence of warp breakage in both creep and normally sized warps. The rate of warp breakage during weaving was much higher in regions sized at creep speed than at normal speed. S...