XPS (Extruded Polystyrene) board takes polystyrene as the main raw material, supplemented by other additives, after heating and mixing, adopts advanced carbon dioxide foaming process, and forms rigid foam plastic plate through extrusion and pressing. The unique production process endows this material with perfect structural characteristics, and its excellent application performance quickly gained market recognition and widespread promotion. It has now become an important component in the fields of refrigerated carriages, trailers, RVs, and energy-saving insulation materials.