Abstract

This study reports an experimental investigation on the influence of sewing threads on seam puckering of sheep nappa leathers with variation of stitch density, stitch type and thickness of leathers. The seam pucker of sheep nappa leathers was evaluated using lock and zigzag stitches. Seam pucker was correlated with reversible strain, leather properties, thread properties and stitch density. The results show that core spun thread resulted in lower pucker than spun polyester thread. Also, specimens sewn with reasonably thicker and stronger thread exhibited less pucker. It is also observed that seam pucker decreased as the stitch density increased.