Effect of Yarn Structure on Fabric Stiffness

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">The effect of structure of weft yarn on fabric stiffness has been investigated, keeping the warp yarn, fabric sell and weave the same. Yarns of the same resultant count, but of seven different structures, first with single Z twisted, second and third 2-ply and 3-ply single Z and folded Z twisted, fourth and fifth 2-ply and 3-ply single Z and folded S twisted, and sixth and seventh 2-ply and 3-ply without folding twist, were used. It was observed that the 2-ply yarn with folding twist opposite to single yarn exhibits maximum weft-way fabric stiffness and in general exhibits maximum stiffness. Increase in the number of plies from 2 to 3 in folded yarn lowers the warp-way and overall fabric stiffness. In the case of parallel yarns, i.e. yarns without folding twist, increase in the number of plies has insignificant effect on warp-way, weft-way and overall stiffness of the fabric. Fabric having warp and weft of the same twist direction has higher warp-way but lower weft-way stiffness compared to a fabric having warp and weft of different twist directions, when the number of plies in. the yarn used is the same.</span>