... high tenacity polyester thread raw and color sewing 210D/3,420D/3,630D/3, 1kg/cone, 20kg/ctn Sewing threadThe SHOE high speed ... better than other polyester also produce bonded thread ,the product through du,pont gum,dry and pass by again smooth with ... heat shrinkable rate D DTEX FIL % % 210/3 3.5 13.0 5.5 420/3 7 15.0 5.0210/6 7 ...