It is generally known that the prominance of twill lines in a twill fabric is influenced by the direction of twist in the warp and weft yarns. Normally the left hand warp twill (also called 'S' twill) is more prominent with Z-twist in warp and weft and the right hand warp twill (also called 'Z' twill) is more prominent with S-twist in warp and weft. This interaction of twist and twill directions has some significant influence on certain physical properties of the fabric. This particular report gives some interesting results on the effect of the interaction between twist and twill directions on tensile properties of the twill fabrics. The results of this study show that the warpway tensile strength is higher for crossed twill constructions (prominent twills) with the exception of 2/2 twill weave, when the warp and weft yarns in the fabric are like twisted as compared to parallel twill constructions (non-prominent twill). The difference in warpway tensile strength has been attributed to the tightness of the structure in cross twill constructions and the bedding properties, being better for these constructions.
展开▼
