International Journal of Scientific & Engineering Research Volume 10, Issue 9, September-2019 554 ISSN 2229-5518 IJSER © 2019 http://www.ijser.org Analysis of ring spun yarn quality on the basis of spindle speed G. M. Faysal Abstract— Supima cotton fibre used to produce fine count 70Ne and 90Ne yarn in different spindle speed at ring frame where all parameter of Blow- room to Ringframe were same. The produced yarns were analyzed in Uster Tester 4 for assessing the quality of yarn. Yarn Unevenness %, IPI, Hairi- ness and yarn strength were monitored with the variation of spindle speed. The end breakage was also noted with the variation of spindle speed. The yarn U%, IPI and Hairiness were increasing trend with the increasing of spindle speed and yarn strength was decreasing trend with the increasing of spindle speed. Due to the decreasing trend of yarn strength the end breakage was also increasing trend. The increasing trend of end breakage was decreasing the efficiency of machine. So the profit of spinning mills was hampered due to the decreasing trend of machine efficiency. So the maximum profit of spinning mills depends on the optimum setting of spindle speed of ringframe according to the requirement of customer demand. Index Terms— Fibre, Spindle speed, IPI, Hairiness, Strength . ——————————  —————————— 1 INTRODUCTION Bangladesh is a developing country where the economy of Bangladesh depends on textile sector. There are 425 spinning mills established in Bangladesh which provide the raw mate- rials yarn to the textile sector [1]. The size of spinning deter- mine by the number of spindle of a spinning mills. The total numbers of spindles are 12410000 in 425 spinning mills in Bangladesh [1]. The quality of ring spun yarn depends on many factors and the production of yarn depends of ring spindle speed. So the effect of spindle speed of ring frame on yarn quality is very important. The aim of this research is to produce maximum yarn with high quality in optimum spindle speed. The productivity of ring frame is directly related to the profitability of a spinning mill and also the productivity of a spinning mills is depends on the spindle speed of ring frame. So the profitability of a spinning mills depends on the spindle speed of ring frame [2]. But the higher spindle speed effect the quality of yarn as well as end breakage [3]. The yarn tension depends on the spindle speed for a specific traveler number. It is recommended to use light traveler for higher spindle speed and vice versa [2]. The yarn hairiness increases with the increasing of spindle speed [4]. The accurate setting of the spindle reduces the yarn tension and optimizes the production as well as quality of yarn. The yarn quality is determined by the analysis of yarn Uniformity%, IPI, Hairiness, strength and Elongation proper- ties. So it is very important to select the spindle speed accord- ing to materials. On the other hand the fibre properties directly related to yarn quality. Approximate 70 to 80% yarn quality depends on fibre properties like staple length, uniformity, short fibre contents, fineness, strength, elongation, maturity, etc. The yarn strength, elongation, U%, IPI and end breakage depends on fibre mi- cronaire value which present the coarseness and fineness of fibre. So it is very important to select the fibre to get better quality of yarn. After all the spinning mills profit is depends on the proper selection of raw material with optimum spindle speed setting. G. M. Faysal, Assistant Professor, Department of Textile Engineering, Anwer Khan Modern University, Dhaka, Bangladesh, Email:faysal.tex@gmail.com IJSER