Öz
Yarn folding and twisting are processes that have positive effects on yarn unevenness, average strength and fabric wrinkle resistance, but also cause significant cost increase. On the other side, siro yarn manufacture is a production method in which spinning, folding and twisting can be done in a single step. The distance between the rovings (strand spacing) is the most important factor determining the yarn quality in siro yarn production. In this study, physical tests of single yarns, plied yarns and siro yarns with different strand spacings were performed and the results were compared. In addition, woven fabric samples were obtained by using these yarns as weft yarn. The fabrics were subjected to physical tests and the differences were analyzed. The strand spacing of each sirospun yarns were chosen as 6 mm, 8 mm, 10 mm and 12 mm, respectively. According to yarn and fabrics test results, the most suitable values were seen in the larger strand spacings. When comparing the yarn quality, yarn hairiness, yarn strength and yarn elongation, fabric tensile strength and fabric elongation, fabric abrasion resistance, pilling resistance and air permeability properties are taken into consideration.