◊ Core technology Heat preservation, produce super length and width plate. ◊ Application New construction material used in large industrial plants, cold storage, garage, mobile houses, exhibition hall, gymnasium, shopping malls, airports, power plants, villa, hospital, basement and high-rise office buildings roofs and walls. ◊ Advantages PU sandwich wall pane as a kind of excellent energy-saving heat preservation construction material, its excellent heat insulation, fire prevention, thermal insulation performance can provide efficient solution to the crisis of China energy consumption. PU sandwich wall panel of Class A has excellent heat insulation performance. The heat preservation effect of this 5cm thick composite board is equivalent to 1cm thick concrete’s heat preservation effect.