Third, anti-corrosion, durability of the general aging of rigid foam insulation materials easily used for several years, with the attendant result in performance degradation caused by water. The extruded sheet because of excellent corrosion, aging resistance, thermal insulation, water vapor under high pressure, the composite xps extrusion board, can maintain its excellent performance, xps extrusion board, the service life of up to 30- 40 years. 1> widely used in wall insulation, flat concrete roof and steel roof insulation; 2> moisture-proof insulation for low temperature storage of the ground areas, parking platforms, airport runways, highways and the like. Extruded polystyrene board is heated and mixed polymer resin supplemented while Luoyang xps extruded sheet, into the catalyst, then press out the continuity of closed-cell foam extruded rigid foam board, which is independent of the internal The bubble-enclosed structure, is a high-compression, low water absorption, moisture-proof, airtight, light weight, corrosion resistance, super anti-aging (long-term use almost no aging), low thermal conductivity, excellent performance of environmentally friendly insulation material.