Abstract
A common problem in the production of core-spun yarns on the ring spinning frame is slippage of the staple sheath fibres relative to the core. This effect is known as ‘strip-back’ or ‘barberpole’, which may lead to incomplete core coverage and result in end-breaks in subsequent processing. The present work is an attempt to reduce the slip-back and improve yarn quality. The system, three-strand modified method, employs three strands of sheath fibres and three core filaments on a modified ring frame. For the experimental work, multi-filament nylon strands were used as the core and acrylic staple fibres as the sheath components. For the sake of comparison, the same materials were used to produce core-spun yarns by conventional ring and Siro systems. The test results indicate that the yarn produced by three-strand modified method has superior physical and mechanical properties in comparison to the ring and Siro core-spun yarns counterparts.
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