Polymer absorbent resin (SAP = superabsorbence polymer for short) is a typical functional polymer material. It can absorb hundreds or even thousands of times its own weight of water, and has strong water holding capacity, so it is also known as super absorbent or super water retaining agent. Super absorbent resin is a new type of polymer material, which can absorb water hundreds to thousands of times its own weight, non-toxic, harmless and pollution-free; It has strong water absorption capacity and high water retention capacity. It is a high molecular weight polymer obtained by acrylic acid polymerization & rarr; High water retention, the balance of absorption under high load, the absorbed water can not be squeezed out by simple physical methods, and can release and absorb water repeatedly.