Production dataTechnical Information 34. Chemical Component table of work materials Chemical Composition (%) Mechanical Property of Standard test block Tensile strengthOthersHardness Heat treatment ofstandard test block remaining Casted remaining Casted remaining remaining remaining ■Kinds of thermosetting plastics and symbols Name Symbol Name Symbol Alkyd resin Phenol resin Allyl resin Unsaturated polyester resin Urea resin Silicone resin Melamine resin Polyurethane Epoxy resin ・Thermosetting resin : Heated at 80 °C, it becomes sticky paste with uidity. Then it is injected into the mold under pressure. Once hardened, the plastics does not get soft owing to polymer processing. Technical-110