Production of Core Spun Yarn with Ring & Siro Spinning System

Abstract

A common problem in production of core–spun yarns on the Ring spinning frame is the slippage of the staple fibers as sheath fibers relative to the core. This effect is known as ‘strip-back’ or barberpole. This problem may lead to an incomplete core coverage and results in end–breaks in subsequent processing. In order to avoid this problem, in the present work, core spun yarns (acrylic sheath fiber / nylon flat core ) on the Ring and Siro spinning have been produced and the effect of some factors were investigated. The factors studied were, filament pre-tensioning (i.e. 1, 7/5, 10, 15, 50 & 100 gram), spinning system (Ring and Siro), feeding arrangement of filament in to strand (6 types of feeding arrangements), in addition covering factor of core spun yarns was also determined by the image processing method. The results show that quality of the core spun yarns produce by Siro spinning system is much better than Ring spun counterpart.