TOP COVERED SPANDEX YARN SECRETS

Chemical path to polyurethane polymer Employed in manufacture of spandex. Spandex is mainly made up of a polyurea derived from the reaction of the diol in addition to a diisocyanate. Two courses of spandex are described by the "macrodiols". 1 class of macrodiols is definitely the oligomer generated from tetrahydrofuran (i.The Remarkable elasticity