... productsThe main product is hi-performance bare spandex yarn,15D,20D,30D,40D,70D,105D,140D,210D,280D,420D,560D,840D ... white and black spandex. UsageCovering core, air interlacing yarn, circularly knitting, warp knitting, weft knitting, stockings, covering with cotton, medical bandage, ... channel,and it eventually fomes the spandex bare yarn.The workers pick spandex bare yarn up and place them in the ...