Effects of Weft Count and Weft Density on Yarn Crimp% of Unbleached And Bleached 3/1(S) Twill Woven Fabrics

Abstract

In this study, the effects of weft yarn count and weft density on crimp% of unbleached and bleached 3/1(S) twill woven fabrics are investigated. The warp yarn properties (type, count and warp density) were kept constant while the effect of variation in weft count and weft density were studied. Crimp% of unbleached and bleached fabrics are calculated by dividing the difference between straightened yarn length and the distance between the ends of the yarn while in the fabric, by the distance between the ends of the yarn while in the fabric as percentage. It is observed that the crimp% of warp and weft yarn in woven fabric is effected by weft count and weft density statistically. Moreover weft and warp crimp% of bleached fabrics have higher values than unbleached fabrics as a result of the change in weft densities after bleaching process.