Release agent is a functional substance that lies between the mold and the finished product. Release agents have chemical resistance and are not dissolved when in contact with the chemical components of different resins, especially styrene and amines. Release agents also have heat resistance and stress resistance, and are not easily decomposed or worn; The release agent adheres to the mold without transferring to the processed parts, and does not hinder painting or other secondary processing operations. Due to the rapid development of injection molding, extrusion, rolling, compression molding, lamination and other processes, the amount of release agent used has also significantly increased.