Polyvinyl pyrrolidone (polyvinyl pyrrolidone), referred to as PVP, is a non-ionic polymer compound, and is the most characteristic, deepest and most widely studied fine chemical among N-vinylamide polymers. It has developed into three categories of non-ionic, cationic and anionic, three specifications of industrial grade, pharmaceutical grade and food grade, and a series of homopolymer, copolymer and cross-linked polymer products with relative molecular weight ranging from thousands to more than one million , and has been widely used for its excellent and unique properties.
