XPS foamed sheet, also known as extruded polystyrene board (referred to as XPS), has a perfect closed cellular structure, aspects of its density, water absorption, thermal conductivity and vapor permeability coefficient are lower than other type of heat insulation materials, it has good strength, lightweight, airtight, corrosion-resistant, anti-aging, low prices, is widely used in antifreeze thermal insulation construction, highway, railway, airport, square, home decoration and other fields, is currently recognized as the best insulation materials market.