Yarn residual torque or twist liveliness occurs when the twist is imparted to spin the fibers during yarn formation. It causes yarn snarling, which is an undesirable property and can lead the problems for further processes such as weaving and knitting. It affects the spirality of knitted fabrics and skewness of woven fabrics. Generally, yarn residual torque depends on yarn twist, yarn linear density, and fiber properties used. Composite yarns are widely produced to exploit two yarns with different properties such on optimum way at the same time and these yarns can be produced by wrapping sheath fibers around filament core fiber with a certain twist. In this study, the effect of filament fineness used as core component of composite yarn on residual torque was analyzed. Thus, the false twist textured polyester filament yarns with different filament fineness were used to produce composite yarns with different yarn count. The variance analysis was performed to determine the significance of twist liveliness of filament yarns and yarn count on yarn twist liveliness. Results showed that there is a statistically significant differences at significance level of α=0.05 between filament fineness and yarn residual torque of composite yarns.
 Babaarslan, O. (2001). Method of producing a polyester/viscose core-spun yarn containing spandex using a modified ring spinning frame. Textile Research Journal, 71(4), 367-371.
 Vuruskan, D., Babaarslan, O., İlhan, İ. (2011). Effect of production parameters on strength and elongation of the selected yarns containing elastane. Tekstil ve Konfeksiyon, 21, 22-29.
 Mahmood, N., Jamil, N.A., Nadeem, M., Saeed, M. A. (2003). Effect of multiple spinning variables on the spinability of cotton covered nylon filament core yarn. Pakistan Textile Journal, LII(2).
 Singha, K. (2012). Analysis of spandex/cotton elastomeric properties: spinning and applications. International Journal of Composite Material, 2(2), 11-16.
 Shanbaz, B., Nawaz, S.M., Ali, R. (2002). Spinning performance and yarn properties of multiple filament polyester/cotton core yarn. Pakistan Journal of Applied Sciences, 2(3), 324-326.
 Dhouib, A. B., El-Ghezal, S., Cheikhrouhou, M. (2006). A study of the impact of elastane ratio on mechanical properties of cotton wrapped elastane-core spun yarns. Journal of Textile Institute, 97(2), 167-172.
 Helali, H., Dhouib, A.B., Msahli, S., Cheikhrouhou, M. (2011). Influence of dorlastan® draft and yarn count on the elastic recovery of the dorlastan® core spun yarns following cyclic test. The Journal of The Textile Institute,1-7.
 Jeddi, A.A., Johari, M.S., Merati, A.A. (1997). A study of the structural and physical properties of cotton-covered nylon filament core-spun yarns. The Journal of Textile Institute, 88(1), 12-20.
 Yang, H.W., Kim, H.J., Zhu, C.Y., Huh, Y. (2009). Comparisons of core-sheath structuring effects on the tensile properties of high-tenacity ring core-spun yarns. Textile Research Journal, 79(5), 453-460.
 Erez, E., Çelik, P. (2014). A research on the parameters of the affecting yarn properties of cotton-polyester rigid core-spun yarns. Tekstil ve Konfeksiyon, 24(2), 195-201.
 Hoı, W.Y. (2011). A study of yarn torsional property and its effects on knitted fabric. The Hong Kong Polytechnic University Institute of Textiles & Clothing, 109 pages.
 Bhatia, D., Sinha, S.K. (2014). Comparative assessment & empirical modeling for aesthetic behavior of vortex & ring yarn knitted fabrics on laundering. International Journal of Fiber and Textile Research, 4(4), 62-70.
 Hassan, N.A.E. (2013). An investigation about spirality angle of cotton single jersey knitted fabrics made from conventional ring and compact spun yarn. Journal of American Science, 9(11), 402-416.
 Murrels, C. (2007). Twist liveliness of spun yarns and the effects on knitted fabric spirality. Hong Kong Polytechnic University Institute of Textiles and Clothing, Ph.D. Thesis, 215 pages.
 Kothari, V.K., Singh, G., Roy, K., Varshney, R. (2011). Spirality of cotton plain knitted fabrics with respect to variation in yarn and machine parameters. Indian Journal of Fibre & Textile Research, 36, 227-233.
 Çelik, P. (2006). A research on snarling tendency (yarn liveliness) of staple yarns and factors affecting this tendency. Ege University, Graduate School of Natural and Applied Sciences, Ph.D. Thesis, 180 pages.
 Tavani, H., Ataeian, A., Ghasemi, L., Kargar, Z. (2007). Comparison of the properties of false twist textured super bright, semi-dull, grey and black dope dyed polyethylene terephthalate yarns. Fibres & Textiles in Eastern Europe, 15(4/63), 54-58.
 Basu, G., Roy, A.N. (2002). Effect of thermal treatment on wrap-spun jute yarns. Indian Journal of Fibre & Textile Research, 27, 369-375.
 Erdumlu, N., Oxenham, W. (2011). Tensile properties of plied vortex yarns. Electronic Journal of Textile Technologies, 5(3), 1-9.
 Örtlek, H.G., Önal, L. (2008). Comparative study on the characteristics of knitted fabrics made of vortex-spun viscose yarns, Fibers and Polymers, 9(2), 194-199.
 Purane, S.V., and Panigrahi, N.R. (2007). Microfibres, Microfilaments & Their applications, Autex Research Journal, 7(3), 148-158.
 Mukhopadhyay, S.(2002). Microfibres-An overview, Indian Journal of Fibre & Textile Research, 27, 307-314.
 Mukhopadhyay, S., Ramakrıshnan, G. (2008). Microfibres, TextileProgress, 40(1), 1-86.
 Sarıoglu, E., Babaarslan, O. (2016). A study on physical properties of microfilament composite yarns, Journal of Engineered Fibers and Fabrics, 11(3), 90-98.
 Kun, Y. (2006). Torsional behaviour of short-staple torque-balanced singles ring spun yarns and spirality of resultant knitted fabrics. The Hong Kong Polytechnic University Institute of Textiles and Clothing, Ph.D Thesis, 253 pages.
 Krishnakumar, V., Dasaradan, B.S., Subramaniayam, V. (2004). Effect of fibre quality index on spirality of weft knitted fabrics, 3rd INDO-CHECH Textile Research Conference, June 14-16, Liberec, Chech Republic.