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