THE SINGLE BEST STRATEGY TO USE FOR SPANDEX YARN HS CODE

Chemical route to polyurethane polymer used in manufacture of spandex. Spandex is especially made up of a polyurea derived in the response of the diol in addition to a diisocyanate. Two classes of spandex are outlined because of the "macrodiols". 1 class of macrodiols could be the oligomer generated from tetrahydrofuran (i.The very first spandex fi