Abstract:

Mechanical and physical properties of spun yarns are very important for post-spinning operations as well as for determining some final fabric characteristics. These properties greatly depend on the yarn structure characterised by the geometrical arrangement of fibres in the yarn body. The geometry of the spinning triangle plays a significant role in determining the spun yarn structure. Solo-siro is a new spinning system which proposes fundamental modifications to the Solo spinning process with the aim of altering the geometry of the spinning triangle and hence the yarn structure. By comparing Solo-siro and Solo spun yarns, the present research focuses on identifying those structural differences which can be used to explain the properties of these novel yarns. Results show that Solo-siro spun yarns enjoy superior physical and mechanical properties in comparison with Solo spun yarns. This can be attributed to the higher mean fibre position, higher migration factor, greater proportion of fibres which are broken during yarn failure and lower hairiness in Solo-siro spun yarns.