The difference between resin and plastic:
Resin usually refers to the softening or melting range after heating, softening when there is a tendency to flow under external force, at room temperature is a solid, semi-solid, and sometimes can be a liquid organic polymer. Broadly speaking, any polymer that can be used as raw material for plastic products is called resin.
Plastic refers to the resin (or monomer in the process of direct polymerization) as the main ingredient to plasticizers, fillers, lubricants, colorants and other additives as an auxiliary component in the process of flow molding material.
Thus, the resin is one of the raw materials of plastic, plastic resin is the finished product. Or, unmolded is resin, molded plastic.