The effect of weft density on the skewness of the twill weave woven fabric

This experimental study investigates the effect of weft density on the skewness of the twill weave woven fabrics. A total of 12 rolls of woven fabrics - 2/2, 3/3 and 4/4 - twill weave, with 20, 22, 24 and 26 weft densities were produced and their skewness due to relaxation was measured. The measured values show that as the weft density increases from 20 to 26, the skewness decreases from 2.4, 2.9, 3.6 to 1, 1.1 and 1.15 respectively. This decrease supports the idea that the increase in weft density drops the effect of the weave type on skewness. In fact, this experimental work reveals that increase in weft density lowers the free spaces between the floats, shortens the float length and raises the shearing rigidity of the fabric and as a result the ability of the warp floats’ in-plane lever to move and skew is lowered.