Hangzhou Sunflower Technology Development Co., Ltd. was established with the leadership of Professor level senior engineer Wu Jiaxiang, who is also a famous scientist and the creator of PVP in China. The company has 25-years-experience of man ufacturing PVP products.We have four main PVP series products, including homopolymers, copolymers, crosspolymers and complexes with more than 20 products including:PVP K15,K17,K25,K30,K60,K90,PVP-Iodine,PVP VA37,Va64,VA73,Crospovidone,etc.Our pharmaceutical products comply with EP5,USP27,USP26.