Studies on elastane-cotton core-spun stretch yarns and fabrics: Part I-Yarn characteristics

The present paper reports the interaction effect of elastane stretch, proportion of elastane core and twist multiplier on physical and mechanical properties of stretchable elastane-cotton core-spun yarns. The core component is 78 dtex elastane filament and the sheath consists of cotton. The core-spun yarns are produced in a modified ring frame. A three-variable factorial design technique, proposed by Box & Behnken has been used to study the combined interaction effect of the above variables on various yarn characteristics, like tenacity, breaking elongation, yarn-to-metal friction, elastic recovery and hairiness. It is observed that the above parameters have significant impact on all the yarn characteristics except breaking elongation.