EFFECTS OF YARN AND FABRIC CONSTRUCTION ON SPIRALITY OF COTTON SINGLEJERSEY FABRICS

Spirality arising from loop distortion in single-jersey knitted fabric s is discussed. Test methods for measuring fabric spirality in knitted fabrics are outlined. Results of an experimental investigation are st atistically analyzed considering the effects of yarn/fabric constructi on factors on the spirality behavior of laboratory produced single-jer sey fabrics. The study reveals that the steady-state loop shape for th e washed/tumble-dried knitted specimens is not unique. Accordingly, th e construction factors considered in the statistical analyses are yarn linear density, yarn twist factor, fabric tightness factor, and fabri c loop shape. The analyses reveal the importance of the yarn twist fac tor as well as the fabric tightness factor in promoting fabric spirali ty. Multiple linear regression equations of practical importance for p redicting fabric spirality are derived from the experimental results.