Effect of spandex linear density and twist multiplier on the properties of core spun yarn and denim fabric

Abstract

Abstract The utilization of core‐spun yarns with spandex has achieved significant interest over the past decade because of their exceptional stretchability, resilience, and comfort features. The main objective of this study was to evaluate the effects of changing the spandex denier and twist multiplier on the physio‐mechanical properties of 16 Ne core spun yarn and the produced denim fabric using these yarns as weft. Core‐spun yarns were produced from three different spandex deniers at various TM values, where cotton roving was used as the sheath. Fabrics were manufactured using an air‐jet weaving machine with the core spun yarn as weft and 100% ring cotton yarn as warp (12 Ne) following the identical 3/1 twill weave pattern. Results reveal that using different spandex percentages shows better results at different TM parameters. Both yarn and fabric were attained at a twist multiplier of 5.0, 5.5, and 6.0 for 40, 70, and 105 D, respectively. Additionally, it was discovered that the yarn produced using lower spandex denier gives higher tenacity for yarn and fabric. However, the yarn produced using a higher spandex denier gives higher elongation percentage for yarn, higher tear strength, recovery, and lower growth percentage fabric. Highlights Influence of spandex denier and twist multiplier on the physio‐mechanical properties of core‐spun yarn and the resulting denim fabric. The higher spandex denier exhibited greater tear strength, better recovery, and lower fabric growth percentages. Increasing the twist multiplier initially increased the tenacity and elongation percentage of yarns and fabrics, followed by a decrease. Higher spandex percentages reduced hairiness and increased with higher twist levels. Higher spandex denier indicates the need for tailored TM settings based on spandex denier to achieve desired fabric properties.

Keywords

• core spun yarn
• denier
• denim
• linear density
• spandex