Compared with other insulation materials, polyurethane foam has the best thermal insulation. Therefore, xps extruded sheet, thinner polyurethane sandwich material to meet the relevant provisions on building energy consumption limits, thus allowing the use of thinner plates are built to save building space; stable quality, high production efficiency. In the case of a sharp rise in demand for polyurethane sandwich panels factory production line, in addition to convenient control quality, xps extrusion board brand, the more it brings a good economy and competitiveness; Third, anti-corrosion, durable Durability is generally rigid foam insulation material easy to aging after years of use, then it led to performance degradation caused by water. The extruded sheet because of excellent corrosion, aging resistance, thermal insulation, water vapor under high pressure, can maintain its excellent performance, service life of up to 30 - 40 years.