Stress relaxation and elastic recovery behaviour of dual core stretchable ring spun yarn

Abstract

The main goal of using dual core spun yarn is to take advantage of all properties of its different components. Dual-core yarns comprising three components are currently in vogue. They combine the pleasant wear properties of elastic core yarns with high dimensional stability. The production of these yarns is a challenging process even at the spinning stage, but they are making high demands in the market. Such stretchable core yarns are produced using a modified Ring frame. In this system, dual core spun yarn is produced with a view to combining the advantageous aspects of two components, namely (i) Lycra and polyester filament as dual core elements and (ii) cotton fibres as sheath component that form a structured yarn. The main aim is to combine the good characteristics of two different fibers in a single yarn. Tensile properties, elastic recovery behaviour and stress decay of these dual core spun yarns are studied and a comparative analysis with conventional ring spun yarns are presented in this article. It is found that the dual core yarn is better in tensile behaviour, elastic recovery behaviour and stress decay as compared to conventional ring spun yarn.