Studies on air-jet textured sewing threads

Abstract

Air-jet textured, textured-twisted and textured-plied yarns have been made from apparel-grade polyester flat yarns and compared with commercial cotton and spun polyester sewing threads for properties and seam efficiency. The uniformity characteristics of air-jet textured sewing threads are far superior to those of cotton and spun polyester threads. The tenacity, loop strength and knot strength of textured sewing threads are lower than those of spun polyester threads but slightly better than those of cotton threads. Textured threads have high friction values than commercial threads. The seam efficiency of fabrics stitched with textured threads is higher compared to that of fabrics stitched with cotton threads and close to that of fabrics stitched with spun polyester threads. Minimum knot strength has a good correlation with seam efficiency.