Effect of stitch length on some properties of cotton 1 × 1 rib knitted fabrics

Abstract

For dry relaxed cotton 1 × 1 rib knitted fabrics is investigated experimentally the effect of stitch length on the porosity P(%), the air permeability V(cc/cm2/sec), the thermal retaining property H(%), the bending length L(mm), the breaking strength S(kgf), the elongation E(%), and on the dimensional properties (Uc=Cu×lu, Uw=Wu×lu, Us=Uc×Uw, Uc/Uw=Cu/Wu and the ratio t/l, where Cu and Wu are the course units/unit fabric length and wale units/unit width, lu is the stitch length in cm, t the fabric thickness in cm and l the loop length in cm). Us is approximately constant and independent of the stitch length. When the stitch length increases, Uw, P(%), V(cc/cm2/sec) and E(%)'s in course, 22.5° and 45° directions increase, and Uc, Uc/Uw, the ratio t/l, H(%), L(mm) and S(kgf) in each direction, and E(%)'s in wale and 67.5° directions decrease.