
A synthetic fabric with polymer base with exceptional elastic properties is called spandex. Spandex is manufactured by using PTMEG and MDI as the chemical reactants and is used in the manufacture of skin tight garments such as belts, bras, gymwear, gloves, hosiery, swimwear, slacks, socks, undergarments etc. Spandex is also used in orthopedic braces and surgical hoses. It is produced through four different processes including reaction spinning, melt extrusion, solution dry spinning and solution wet spinning. A monomer is initially reacted to form a prepolymer which is in turn reacted to form spandex fibers. Spandex is usually stronger and more durable than latex or rubber. A spandex fabric expands up to 600% of its original length without losing its integrity. Some prominent areas of application of spandex include home furnishings, casual clothing, sportswear, diapers, compression stockings and hoses, bandages and others.