PU foam rigid panel (Faux Stone panel) has the characteristics of light weight, good insulation effect, convenient construction, sound insulation, shockproof, electrical insulation, heat resistance, cold resistance, solvent resistance and other excellent characteristics. It has been widely used in aerospace, shipbuilding, petroleum, electronic equipment, vehicles, food and other industrial departments at home and abroad.
Pu hard foam with lower density is mainly used as heat insulation (thermal insulation) material, while Pu hard foam with higher density can be used as structural material (imitation wood), such as Faux Stone Wall.
The thermal conductivity of PU Rigid foam is lower than that of polystyrene, other foamed plastics and natural thermal insulation materials. It has excellent thermal insulation effect, and can be cast or sprayed on site. It can be integrated with the thermal insulation materials to make the thermal insulation effect better. Therefore, in the field of thermal insulation, polyurethane foam is the preferred material with a wide range of applications.
Building construction is one of the most important application fields of PU Rigid foam. In the United States and other countries, PU Rigid Foam for construction accounts for about half of the total consumption of rigid foam, which is more than twice the consumption of refrigerators, freezers and other rigid foam. In recent years, Faux Stone Wall siding and panels have been used more and more. Many countries in the world have clear regulations on building energy consumption, which promotes the application of hard bubbles in building construction. The annual consumption of polyurethane foam for construction in the United States is about 300000 tons, accounting for 65% of the construction foam Market (the rest are polystyrene and phenolic foam), and about 50% of the total PU Rigid foam.
Polyurethane rigid foam is also used for heat insulation and waterproof of roofs of residential and office buildings, heat insulation of walls, and thermal insulation materials of cold storage and grain storage. Spraying hard foam on the roof, plus a protective layer, has the dual effects of heat insulation and waterproof.
Pu Faux Stone Wall is made of flame-retardant rigid polyurethane foam (PU and PIR) as raw materials, color coated steel plate as surface material, and continuously molded through Pu or PIR foaming, also known as composite simulation stone board. It integrates light weight, high strength, heat insulation, waterproof and decoration. It is a new multifunctional building material that is easy to produce, construct and install.
At present, faux stone wall of PU foaming is widely used in industrial plants, warehouses, stadiums and gymnasiums, civil residences, villas, prefabricated houses, combined cold storage and other buildings as roof panels and wall panels. Because of its light weight, heat insulation, waterproof, decoration and other characteristics, as well as convenient transportation (installation) and fast construction progress, it is deeply welcomed by the design, construction and developers.
Pu hard foam filled in hollow brick can be made into hard foam filled hollow brick, which has good heat preservation effect. Pu hard foam concrete can also be made. The density of this concrete block is about 200kg/m3, the compressive strength is 0.59~0.78mpa, and the thermal conductivity is about 64mw/ (m · K). It can be made into large-scale building components.
PU foam rigid Faux Stone panel can be made into various foldable mobile houses for temporary use in the field. If the surface of 10mm thick Pu hard foam is covered with polyethylene, it can be made into a folding house, or a full Pu hard foam spherical temporary house can be made by spraying Pu hard foam.
For water conservancy facilities such as concrete dams, thermal insulation measures shall be taken during construction in cold winter. Pu hard foam can be sprayed on the new concrete surface as the thermal insulation layer. In severe cold areas, polyurethane insulation board can be used as the antifreeze material for channel lining to reduce the damage of frost heave to the rigid lining material of the channel and ensure the stability of the lining and the safe use of the channel.
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