Yarn Grading: I usually refer to grading requirements, which consist of the diameter and uniformity of yarn strands. A dependable diameter gives improved physical appearance and performance of fabrics. Elasticity，toughness，breathability，versatility，condition retention，very good dyeability，lightweight Heat sensitivity: Spandex may be broken by large temperatures, which might resu... https://double-covered-yarn26925.free-blogz.com/79043091/the-5-second-trick-for-covered-spandex-yarn