Performance improvement of charkha spun crossbred wool yarn using siro spinning

Indian decentralized wool sector commonly deploys new model charkha (NMC) to produce woollen yarn. It is difficult to obtain the maximum realization of native wool fibre properties into a single yarn spun on a ring spinning system. This is due to the shorter length and higher fibre diameter of indigenous and crossbred wool in comparison to that of Australian Merino wool. A study was made on siro-spinning attachment to NMC charkha to improve quality of yarn produced from crossbred wool. The yarn quality performance was measured in terms of tenacity, elongation, evenness and hairiness. It was observed that siro attachment improved the yarn quality of crossbred wool over the conventional NMC spun yarns. Tenacity and elongation were improved by >38% and 65%, respectively. The doubling effect in siro spinning masks the short length of cross-bred wool and thereby improves yarn strength. The doubling effect also contributes to reduce yarn hairiness and imperfections. Thus, yarn evenness was found better for siro attachment fitted charkha yarn than conventional charkha spun yarn. The attachment is easy to link with existing NMC and hence recommended for spinning of all native and crossbred wool.