physical characteristics of cotton/polyester core spun yarn made

AUTEX Research Journal, Vol. 9, No1, March 2009 © AUTEXFigure 16. 100% cotton ring frame yarnimproved by about 43%. In the case of air-jet spun core yarns,the trend was from 50% lower strength with 30 den. core to7% lower strength with 70 den. core compared to 100% cottonringspun yarn.The elongation at break was observed to increase by 20% to500% with the increase in the filament percentage at the corefrom 15 to 40%.4. Radhakrishnian, P. and Sawhney, A.P.S., Text. Res. J. 60,99–103, 2 Feb. 1996.5. Osman Babaarslan, Text. Res. J., 71 (4), 367–371, Apr.2001.6. Behara, B.K. and Sardana, A., IIT New Delhi IJFTR 26,280–286, Sept. 2001,7. Bhortakke, M.K., Nishimura, T., and Matsuo, T., Text. Res.J. 69 (2), 84-89, 1999.8. Ahung Kyaw Soe et. al.,Text. Res. J. 74 (9), 819–826,2004.9. Grosberg, P., Text. Res. J. 44, 506–512, 1974.10. Swatney, A.P.S., Robert, K.R., and Ruppenicker, G.F., Text.Res. J. 185–189, Apr. 1989.11. Grosberg, P., Text. Res. J. 36, 42, 1966.12. Harper, R.J. and Ruppenicker, G.F., Woven Textile Res. J.57, 147–154, 1987.13. Livsey, R.G. and Owen, J.D., J. Text. Inst. 55, T516, 1964.∇ΔWith 30 den. core the energy to break was not significantlydifferent than that for 100% cotton ring-spun yarn. With 44den. and 70 den. the values were 25% and 1100% higherrespectively. In the case of air-jet spun core yarns, 30 den.and 44 den. cores did not require any significant difference inenergy to break compared to 100% cotton ring-spun yarn, butwith a 70 den. core, the energy required was 600% to 800%higher.Air-jet core yarns had low U% and lower imperfectionscompared to both ring-spun core yarns and ring-spun cottonyarns.With 30 den. and 44 den. filament at the core, the sheathcover was 100%, whereas with 70 den. core it was about98% in both air-jet and ring-spun core yarns.Therefore, it can be concluded that ring-spun and air-jet spunyarns show better performance in all respects compare to100% cotton ring-spun yarn. Ring-spun core yarn is superiorto air-jet in tensile properties whereas in terms of U% andimperfection, air-jet spun yarn is superior to ring-spun yarn.AcknowledgementsThe authors are extremely thankful to AICTE New Delhi forproviding funds to conduct this research. We are also indebtedto the Director of S.G.G.S. Institute of Engineering & Technologywho gave much encouragement for this project. We are alsothankful to Dr. R.P. Nachne, Sr. Scientist, CIRCOT Mumbaiand Mr A.K. Barik and G.M. Hinganghat Mill, Nagpur, whohelped a lot with conducting this experiment.References:1. Graham, C.O. and Ruppenicker, G.F., Text. Res. J. 53,120–125, 1983.2. Harper, R.J., Jr., Ruppenicker,G., Jr., and Donaldson, D.,Text. Res. J. 56, 80–86, 1986.3. Sawhney, A.P.S., Robert, K.Q., and Ruppenicker, G.F., Text.Res. Inst., 519–524, Sept. 1989.http://www.autexrj.org/No1-2009/ 0305.pdf19