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Apply heat location or chemical treatment options into the covered fiber to boost its general performance and sturdiness. Double covered yarn features a spandex Main that is enveloped by two primary yarns twisted in opposite directions—one in the Z twist (clockwise) and the other in the S t

Chemical path to polyurethane polymer Employed in production of spandex. Spandex is mainly composed of a polyurea derived from the response of the diol in addition to a diisocyanate. Two lessons of spandex are described from the "macrodiols". A single class of macrodiols may be the oligome

This will make the amorphous segments longer, thus escalating the size of the fiber. If the fiber is stretched to its optimum duration, the rigid segments again bond with one another. The amorphous segments continue to be within an elongated state. This tends to make the fiber stiffer and much bette

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