Impact of yarn extension on packing density of ring spun yarn

• Published in: Fibers and polymers 2012-10, Vol.13 (8), p.1071-1078
• Main Authors: Kumar, A., Ishtiaque, S. M., Das, A.
• Format: Article
• Language: English
• Subjects: Binding energy (nuclear); Chemistry; Chemistry and Materials Science; Cross sections; Fibers; Intervals; Packing density; Polymer Sciences; Polymers; Segments; Yarns
• ISSN: 1229-9197; 1875-0052
• DOI: 10.1007/s12221-012-1071-2

The present paper deals with a detailed study on the effect of progressive yarn extension on diameter, overall packing fraction, radial packing fraction at different radial positions and partial packing fraction at different segments along the length of a fibre. An image processing based system to characterize and visualize the configuration of fibers in yarn in extended mode has been adopted. It has been observed that with the increase of yarn extension at different intervals, yarn diameter continuously decreases but at different yarn extension intervals, the percentage decrease value in the yarn diameter is different. But the packing density of yarn does not follow the exact trend of yarn diameter with the extension of yarn at different intervals. The yarn packing density initially increases at very high rate, then at very low rate and finally the packing density of yarn rather slightly decreases with the increase in yarn extension. The radial packing density of the yarn is not uniform across the cross-section of the yarn and it is not maximum near the yarn axis, rather it is maximum at some distance from the yarn axis. The location of maximum radial packing densities of yarn changes with the yarn extension. The partial packing density along the length of yarn is not uniform and the results are equally applicable for all level of yarn extension.