Journal of Textile Science and Technology, 2016, 2, 47-55 http://www.scirp.org/journal/jtst ISSN Online: 2379-1551 ISSN Print: 2379-1543 DOI: 10.4236/jtst.2016.23007 August 30, 2016 Effect of Spinning Parameters on Thick, Thin Places and Neps of Rotor Spun Yarn Md. Reazuddin Repon 1* , Rajib Al Mamun 1 , Selim Reza 2 , Mithun Kumer Das 3 , Tarikul Islam 4 1 Department of Textile Engineering, Khwaja Yunus Ali University, Sirajgonj, Bangladesh 2 PM Group, Narayanganj, Bangladesh 3 Department of Textile Engineering, Daffodil International University, Dhaka, Bangladesh 4 Department of Textile Engineering, Port City International University, Chittagong, Bangladesh Abstract Defect free yarn is a great demand for spinner, knitter, and weaver and also other textile personnel because numerous end products from knit apparels to woven fabrics, from towels to sheets and from carpets to industrial fabrics characteristics significantly depend on the physical properties of yarn. The qualities of rotor yarn are really directed by spinning parameters. The aim of this study is to observe the effect of spinning parameters such as rotor diame- ter and speed on thick, thin places and neps of yarn in rotor spinning process. 0.11 sliver hank of 100% cotton was used to produce 12 Ne yarn. 65% virgin cotton and 35% wastage cotton were mixed together. The positive impact of spinning parameters on yarn properties were accessed by thick places, thin places and neps. Results indicate that the yarn qualities were improved with increasing of rotor speed and rotor diameter. The rotor diameter was settled to 43 mm while rotor speed fluctuated from 35,000 to 45,000 rpm and rotor speed was fixed to 35,000 rpm while rotor diameter across contrasts from 43 mm to 66 mm. Keywords Rotor Spinning, Rotor Diameter, Rotor Speed, Thick Places, Thin Places, Neps 1. Introduction Rotor spinning is considered as most suitable and successful spinning process among many open-end spinning methods [1]. This spinning principle is signifi- cantly acceptable for high production of yarn by using low to medium grade How to cite this paper: Repon, Md.R., Al Mamun, R., Reza, S., Das, M.K. and Islam, T. (2016) Effect of Spinning Parameters on Thick, Thin Places and Neps of Rotor Spun Yarn. Journal of Textile Science and Tech- nology, 2, 47-55. http://dx.doi.org/10.4236/jtst.2016.23007 Received: August 5, 2016 Accepted: August 27, 2016 Published: August 30, 2016 Copyright © 2016 by authors and Scientific Research Publishing Inc. This work is licensed under the Creative Commons Attribution International License (CC BY 4.0). http://creativecommons.org/licenses/by/4.0/ Open Access