Abstract: A method to produce one-piece high-density panel skin (outer part of the door panel) using a specially designed 25 ton mold operated on a 3000 ton injunction molding machine using performance engineering grade poly phenyl impact copolymer as raw material. The two injection molded panels are joined using a custom extruded aluminum frame, with a provision for an improved lock along the whole length and hinges, fitted with specially designed hot plate welded skin holder, subsequently filled with polyurethane for rigidity, strength and high insulation valve. For additional reinforcement for the entry door, 18 gauge CRC steel barrier is embedded in rigid polyurethane core. A door panel produced by the above methods.