Siliceous rock sandwich board is recognized as a good fireproof and thermal insulation board for steel structure building envelope at present. It has the advantages of low thermal conductivity, good load resistance, high bending strength, no water absorption, no decay, no moth bite, good flame retardancy, high fire rating and large temperature resistance range. Using the physical characteristics and unique formula of polyurethane (PU. PIR), the polyurethane foaming agent is evenly sprayed on the color coated steel plate, so that the foaming agent is foamed between the color coated steel plates to form a three-layer disposable polyurethane (PU. PIR) color steel composite sandwich plate. This new light building material is a better combination of color coated steel plate and polyurethane, which is the development direction of light building materials.

Performance features: 1) sealing performance: the siliceous rock sandwich board adopts the assembly line production process, which makes use of the excellent waterproof of polyurethane products, overcomes the disadvantage of easy water absorption and deliquescence of glass wool, and effectively prolongs the service life of the product in terms of physical properties.

2) Aesthetic performance: the interface is designed according to European standards, with round and smooth appearance, flat and beautiful plate surface, tight joints and reliable strength, which can effectively prevent the generation of cold and hot bridges.

3) Good rigidity: the polyurethane double-sided sealed glass wool core material is bonded with two layers of steel plates to form a whole and work together. In addition, the wave forming on the upper surface of the roof panel, its overall rigidity is much better than the on-site composite plate with glass wool (glass wool) sandwiched in the profiled plate. After the sandwich panel is fixed with the purlin through the connector, the overall stiffness of the roof is greatly improved and the overall working performance of the roof is strengthened. Glass wool sandwich board is selected, and large purlin distance can be adopted, so 1 / 3 ~ 2 / 3 purlin consumption can be saved.

4) Reasonable fastening method: the polyurethane double-sided sealed glass wool roof panel adopts concealed fastening connection, which avoids the hidden danger of water leakage in the roof panel joint and saves the amount of accessories.

5) The fixing method is firm and reasonable: the polyurethane double-sided sealed glass wool roof panel is fixed with special M6 self tapping screw and purlin, which can effectively resist external forces such as typhoon. The self tapping screw is set at the crest position between the joints of the two plates of the roof panel, and a special waterproof structure is adopted to avoid the weak point of waterproof.

6) Short installation period: the silica core board can not only keep the surrounding environment clean and tidy without affecting the normal progress of other processes, but also greatly shorten the installation period of the board. The daily average installation area of glass wool core board is 600 ~ 800m2.

7) Scratch protection: during the production of siliceous rock sandwich board, polyethylene self-adhesive protective film can be pasted on the surface to avoid scratch or wear of steel plate surface coating during transportation and installation.