Radial Packing Density of Rotor- and Ring-spun Yarns

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 radial packing density of rotor-spun yarn was measured on the basis of the theory reported earlier by the author [<i>Indian J Text Res</i>, 11 (1986) 26]. The effect of yarn twist and count on the fibre packing density of rotor-spun yarn in comparison with that of ring-spun yarn was studied. The packing density of both the yarns over the yarn cross-section was not uniform and increased with yarn twist. In rotor yarn it was higher near the yarn axis and less towards the outer surface of yarn in comparison with that of ring-spun yarn. The packing density of rotor-spun yarn was less than that of ring-spun yarn, which is one of the causes of the lesser strength of rotor-spun yarn. For the same material and twist coefficient, the packing density of coarse yarn was less than that of finer yarn.</span>