Effect of roller gauge of ring frame on bulkness of worsted grade wool yarn
Ali Akbar Merati
Abstract
Generally, the bulk yarns of two components are produced on a common ring spinning machine and then bulked in a hot solution bath. In this research, attempt has been made to apply an unconventional draft system to improve the quality of worsted yarn of wholly wool. This new method can improve the bulkness and volume of yarns and fabrics made by them. General concept of this research is focused on uneven length distribution of wool fibers and the method of drafting them in roller drafting system. Modification of drafting system along with various roller gauges adjustments can produce a yarn with different physical and mechanical specifications. In this research we have used an ungrooved roller instead of grooved roller on top of middle roller of drafting system. Then, we have changed the distance between front and middle roller of different gauges to produce our samples. We have produced yarn samples with different gauges and then measured their strength, elongation, length and diameter at two stages of before relaxation and after wet relaxation. Finally, we concluded the optimum roller gauge adjustment in which the yarn physical and mechanical specifications are optimum.
Keywords: Wool, Bulk yarn, Worsted system, Ring spinning
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