Effects of Yarn and Fabric Construction on Spirality of Cotton Single Jersey Fabrics

Spirality arising from loop distortion in single-jersey knitted fabrics is discussed. Test methods for measuring fabric spirality in knitted fabrics are outlined. Results of an experimental investigation are statistically analyzed considering the effects of yarn/fabric construction factors on the spirality behavior of laboratory produced single-jersey fabrics. The study reveals that the steady-state loop shape for the washed/tumbledried knitted specimens is not unique. Accordingly, the construction factors considered in the statistical analyses are yarn linear density, yarn twist factor, fabric tightness factor, and fabric loop shape. The analyses reveal the importance of the yarn twist factor as well as the fabric tightness factor in promoting fabric spirality. Multiple linear regression equations of practical importance for predicting fabric spirality are derived from the experimental results.