... ,720D,840D,etc. We can produce white and black spandex.Usage: Covering core, air interlacing yarn, circularly knitting, warp knitting, ... weft knitting, stockings, covering with cotton, medical bandage, baby and adult diaper,narrow fabric ... Oeko-certification class 1. Scale:Phase 1 project Ruyi Spandex has an investment of RMB 300million by Shandong Ruyi science ...