Resin usually refers to the softening or melting range after heating. When softening, it has a tendency to flow under external force. It is solid or semi-solid at room temperature, and sometimes it can be a liquid organic polymer. Broadly speaking, any polymer compound that can be used as a raw material for processing plastic products is called a resin. Resin is the main raw material for the manufacture of plastics, and it is also used to make paints (the main film-forming materials of paints, such as alkyd resins, acrylic resins, and synthetic fatty acid resins. These resins are mostly in the Yangtze River Delta and the Pearl River Delta, and are also relatively Strong areas, such as Changxing Chemical, Nupez resin, Sanying resin, DSM resin, etc.), adhesives, insulating materials, etc., synthetic resins are widely used in the separation and purification of impurities in liquids in industrial production , There are macroporous adsorption resin, ion exchange resin, and some special resins.