Effects of Process Parameters on Tensile and Recovery Behavior of Ring-Spun Cotton/Lycra Denim Yarn

  • Payal Bansal
  • Subhankar MaityEmail author
  • Sujit Kumar Sinha
Original Contribution


Effects of yarn count, twist multiplier, stretch percentage and extension percentage on tensile and recovery behavior of cotton/lycra core-spun yarn had been investigated. Core-spun yarns were prepared in a modified ring frame. A 70 dtex lycra filament was inserted in core and sheath consisted of cotton fibers. It had been observed that yarn count, lycra stretch ratio, extension and twist multiplier had significant effect on tensile and recovery properties of the yarn. A 33 Box–Behnken response surface design was employed to investigate their influence on recovery behavior of the yarn. The immediate elastic recovery and delayed elastic recovery of the yarn were found to be increased with a decrease in stretch percentage. The immediate elastic recovery was observed to be increased with an increase in both yarn count and extension, whereas delayed elastic recovery was found to be increased with a decrease in extension. Total elastic recovery was found to be up to 67% and up to 45% in case of finer yarn (12 Ne) and coarser yarn (8 Ne), respectively.


Core-spun yarn Lycra Stretch percentage Immediate recovery Delayed elastic recovery Denim 



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Copyright information

© The Institution of Engineers (India) 2019

Authors and Affiliations

  1. 1.Department of Textile TechnologyDr. B. R. Ambedkar National Institute of TechnologyJalandharIndia
  2. 2.Department of Textile TechnologyUttar Pradesh Textile Technology InstituteKanpurIndia

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