Influence of some sewing parameters upon the sewing efficiency of denim fabrics

This paper reports an experimental investigation of the effect of the seam threads linear density, the stitch density and some fabric properties on the seam efficiency. Furthermore, on the basis of the seam quality parameters, regression models were determined in order to predict seam efficiency. In this work, 18 denim fabrics, having different compositions and masses, were sewn with two commercial sewing threads. Their performances, ranked according to the seam quality, were also determined. The seam efficiency was calculated by determining of the seam tensile strength and the fabric tensile strength. It was concluded that the increase in the seam thread linear density increases the seam efficiency, as well as the stitch density. However, the fabric mass has a random effect on seam efficiency. About the composition, we conclude that the seam efficiency decreases with polyester but increases with elastane. According to the seam direction, it was found that, in the weft direction, the seam efficiency was more important than in the warp direction.