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Polyurethane v belt, is a transmission belt whose intersecting surface is the shape of ‘V’ and is made of polyurethane. Polyurethane, is any of a class of synthetic resinous, fibrous, or elastomeric compounds belonging to the family of organic polymers made by the reaction of diisocyanates (organic compounds containing two functional groups of structure ?NCO) with other difunctional compounds such as glycols. The best known polyurethanes are flexible foams—used as upholstery material, mattresses, and the like—and rigid foams—used for such lightweight structural elements as cores for airplane wings. Transmission belt, is any of various devices that provide mechanized movement of material, as in a factory.