Abstract
Abstract This article presents a comparative study of hooks’ characteristics of ring, rotor, air-jet and open-end friction spun yarns. Hook types and their extent, spinning in-coefficient and mean fibre extent in the yarns produced on different spinning technologies are investigated. The results show that the hook extents for open-end friction spun yarn are the highest followed by rotor, ring and air-jet spun yarns. Ring and air-jet spun yarns have higher percentage and extent of trailing hook as compared with leading hook, whereas, rotor and friction spun yarns show the reverse trend.
Highlights
Staple yarns are constructed from the bundle of fibres, which are twisted together during the spinning process
This category of leading hooks is formed by the bridging fibres as they bridge the gap that occurs behind the pick up point
The percentage and extent of trailing hook is higher than the leading hook for ring and air-jet spun yarns whereas rotor and friction spun yarns show the opposite trend
Summary
Staple yarns are constructed from the bundle of fibres, which are twisted together during the spinning process. Huh et al [14] have reported a comparative study on the radial packing density of ring, rotor and friction spun yarns structure. Extensive investigations have been devoted to the fibre migration and radial packing behaviours of spun yarns, limited information is available for the behaviour of different types of hooks in ring, rotor, air-jet and open-end friction spun yarns. It would rekindle our interest about the behaviours of fibre hooks as they are emerging out from the final delivery roller of each spinning system right from the very beginning of carding machine With this objective in mind, the present work aims to study the features of various types of hooks in ring, rotor, air-jet and open-end (OE) friction spun yarns
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