NOT KNOWN DETAILS ABOUT SPANDEX YARN MEANING

The crucial function of these molecules is that they're prolonged and flexible. This part of the spandex fiber is responsible for its stretching attribute. The other pre-polymer used to generate spandex can be a polymeric di-isocyanate. It is a shorter chain polymer, which has an isocyanate (-NCO) team on the two finishes. The principal characteris