3) The heat transfer printing technology takes the lead in using the heat transfer printing process to transfer various graphics on the extruded plates, so that the products have a variety of high-grade tree grain and color. According to the popular varieties in the market, we have designed a variety of finishes such as black walnut, ivory white, wax elephant wood for customers to choose, and provided more than 50 types of interior door appearance design to meet the needs of modern consumers' life personality. 4) The raw materials used for the green and environment-friendly wood plastic door package are formed at one time under the conditions of high temperature, high pressure and vacuum. The materials do not contain formaldehyde. The heat transfer printing technology is used for secondary processing, which is paint free. There is no toxic and harmful gas and odor release during production and use. It is a human friendly product that meets the environmental protection standards for modern interior decoration.1) The main raw materials of wood plastic door with high-quality raw materials and scientific formula are PVC resin and high-quality wood powder. The PVC resin is a medical grade domestic famous brand product. The wood powder is provided by a professional wood company with high-quality wood powder of tree species. After grading screening, grinding, drying and coating treatment, the requirements of finished products on the quality of raw materials are guaranteed. The formulation system of wood plastic door is equipped with a certain proportion of auxiliary materials. Stabilizers, foaming agents, modifiers, etc. are added. Various ingredients are mixed in strict proportion to effectively ensure the product quality of the foam board. 2) Advanced production equipment The advanced production equipment is imported from abroad from the mixing system to the extrusion system, which ranks the international leading level and has a high degree of automation. The mixing equipment has the characteristics of accurate dosage, uniform mixing and high efficiency, which fundamentally guarantees the stability of the product. As the production of wood plastic foaming door has high requirements for foaming extruding equipment, the twin-screw extruder with high torque is used, and the screw, screw and other components are modified to adapt to the skinning and uniform foaming of the internal and external surfaces of lignin, and to avoid the carbonization of wood flour.