Combing is a process by which quantity of short fibres and remnant fragments of impurities present in a carded or drawn sliver are minimized to give a clean sliver, having more of a rectangular staple diagram, with vast majority of constituent fibres in a straightened and parallel state. Combing, therefore, makes possible the spinning of yarns of fine counts with low irregularities and a clear appearance, combing also results in stronger, smoother and more lustrous yarns.
In overall spinning process combing operation serves to improve raw material quality by removing noil. The extraction of noil has directly affected on cost, it is not possible to increase noil beyond certain limit. From both economical and quality point of view selection of optimum level of noil extraction is necessary. Keeping this view in mind an attempt has been made to reduce nep level in combing process by adjusting the noil percentage, and to get improvement in yarn quality. Trails has been carried out with three different noil percentage, 18%, 20% and 22%, to make the yarn from counts 35sCW (Tex 16.85), 40s CH (Tex 14.76) respectively with same process parameters from blow room to ring frame as well as mixing.
The authors are associated with NMIMS, MPSTME, Centre for Textile Functins, Shirpur.