Investigation of auxetic performances of single and double layer fabrics woven with braid weft yarns of different structural parameters

Abstract

This study investigated the auxetic performances of single and double layer fabrics woven by using braid weft yarns with different structural parameters. Non-elastane braid weft yarns containing yarn components with different filament numbers and braid weft yarns containing elastane and conventional warp yarns were used in fabrics. To investigate the effects of weave, fabrics with single and double layer structures were woven on an industrial weaving machine. Experimental results showed that the fabrics woven with both non-elastane and elastane braid weft yarns performed an auxetic behavior by giving Negative Poisson's Ratio (NPR) values. It was observed that generally fabrics woven with braid weft yarns containing elastane could improve the auxetic performance. Fabric woven with non-elastane braid yarns of high filament numbers showed a higher NPR. When the effect of the weave on the auxetic performance was examined, a double layer fabric structure was shown to reduce the auxetic effect.