International Scientific Journal

Thermal Science - Online First

online first only

Characterization and statistical modelling of thermal resistance of cotton/polyester blended double layer interlock knitted fabrics

The aim of this study was to analyse and model the effect of knitting parameters on the thermal resistance of Cotton/Polyester double layer interlock knitted fabrics. Fabric samples of areal densities ranging from 310-495 g/m2 were knitted using yarns of three different cotton/polyester blends, each of two different linear densities by systematically varying knitting loop lengths for achieving different cover factors. It was found that by changing the polyester content in the inner and outer fabric layer from 40 to 65% in the double layer knitted fabric has statistically significant effect on the fabric thermal resistance. Fabric thermal resistance increased with increase in relative specific heat of outer fabric layer, yarn linear density, loop length and fabric thickness while decrease in fabric areal density. It was concluded that response surface regression modelling could be successfully used for the prediction of thermal resistance of double layer interlock knitted fabrics. The model was validated by unseen data set and it was found that the actual and predicted values were in good agreement with each other with less than 10% absolute error. Sensitivity analysis was also performed to find out the relative contribution of each input parameter on the air permeability of the double layer interlock knitted fabrics.
PAPER REVISED: 2015-10-25
PAPER ACCEPTED: 2015-11-09
  1. Slater, K., Human Comfort, C. C. Thomas, Springfield, Illinois, 1985
  2. Saville, B. P., Comfort, in: Physical Testing of Textiles (Ed. Woodhead Publishing Ltd., Cambridge, England, 1999. pp. 209-243
  3. Fan, J., et al., A biomimic thermal fabric with high moisture permeability, Thermal Science, 17 (2013), 5, pp. 1425-1430
  4. Tian, M., et al., A theoretical analysis of local thermal equilibrium in fibrous materials, Thermal Science, (2013), 00, pp. 18-18
  5. Xing, T.-L., et al., Thermal properties of flame retardant cotton fabric grafted by dimethyl methacryloyloxyethyl phosphate, Thermal Science, 16 (2012), 5, pp. 1472-1475
  6. Afzal, A., et al., Statistical models for predicting the thermal resistance of polyester/cotton blended interlock knitted fabrics, International Journal of Thermal Sciences, 85 (2014), pp. 40-46
  7. Ahmad, S., et al., Effect of Weave Structure on Thermo-Physiological Properties of Cotton Fabrics, AUTEX Research Journal, 15 (2015), 1, pp. 30
  8. Nazir, A., et al., Improving Thermo-Physiological Comfort of Polyester/Cotton Knits by Caustic and Cellulases Treatments, AUTEX Research Journal, 14 (2014), 3, pp. 200
  9. Cimilli, S., et al., A comparative study of some comfort related properties of socks of different fiber types, Textile Research Journal, 80 (2010), 10, pp. 948-957
  10. Schneider, A. M., et al., Heat transfer through moist fabrics, Textile Research Journal, 62 (1992), 2, pp. 61-66
  11. Wan, X., et al., Measurement of thermal radiation properties of penguin down and other fibrous materials using FTIR, Polymer Testing, 28 (2009), pp. 673-679
  12. Schacher, L., et al., Comparison between thermal insulation and thermal properties of classical and microfibres polyester fabrics, International Journal of Clothing Science and Technology, 12 (2000), 2, pp. 84-95
  13. Ramakrishnan, B., et al., An investigation into the properties of knitted fabrics made from viscose microfibres, Journal of Textile and Apparel, Technology and Management, 6 (2009), pp. 1-9
  14. Oglakcioglu, N., et al., Thermal comfort properties of angora rabbit/cotton fiber blended knitted fabrics, Textile Research Journal, 79 (2009), 10, pp. 888-894
  15. Pac, M. J., et al., Warm-cool feeling relative to tribological properties of fabrics, Textile Research Journal, 71 (2001), 9, pp. 806-812
  16. Ozdil, N., et al., Effect of yarn properties on thermal comfort of knitted fabrics, International Journal of Thermal Sciences, 46 (2007), pp. 1318-1322
  17. Majumdar, A., et al., Thermal properties of knitted fabrics made from cotton and regenerated bamboo cellulosic fibers, International Journal of Thermal Sciences, 49 (2010), pp. 2042-2048
  18. Khoddami, A., et al., Effect of hollow polyester fibres on mechanical properties of knitted wool/polyester fabrics, Fibers and Polymers, 10 (2009), 4, pp. 452-460
  19. Greyson, M., Encyclopedia of composite materials and components, Wiley & Sons, USA, 1983
  20. Havenith, G., Interaction of clothing and thermoregulation, Exogenous Dermatology, 1 (2002), 5, pp. 221-230
  21. Ucar, N. and Yilmaz, T., Thermal Properties of 1×1, 2×2 and 3×3 rib knit fabrics, Fibers and Textiles in Eastren Europe, 12 (2004), 3, pp. 34-38
  22. Oglakcioglua, N. and Marmarali, A., Thermal comfort properties of some knitted structures, Fibers and Textiles in Eastern Europe, 15 (2007), 5, pp. 94-96
  23. ASTM, Standard practice for conditioning and testing textiles, ASTM International, West Conshohocken, PA, 2004
  24. Atlas, M259B Sweating guarded hotplate instruction manual, SDL Atlas Inc., 2010
  25. ISO, Textile - Physiological effects - Measurement of thermal and water vapour resistance under steady state conditions (sweating guarded hotplate test), International Organization for Standardization, Geneva, Switzerland, 2014