PU（Polyurethane） sandwich panels are "all-round players" in the field of modern architecture and industry. Their core manufacturing process combines material science and precision processing. By filling polyurethane foam between two layers of metal panels (such as color steel plates, stainless steel plates, and aluminum alloy plates), they are solidified by high-pressure foaming. During the production process, the polyurethane stock solution undergoes a chemical reaction in the mold, rapidly expands and fits tightly to the panels to form an integrated structure.
Excellent performance makes PU sandwich panels stand out. First, super strong thermal insulation, with a thermal conductivity as low as 0.024W/(m・K), can effectively block heat transfer; second, high compressive strength, thickness can reach more than 200mm, can withstand large loads, and ensure structural stability; third, good fire resistance, after special treatment can reach B1 flame retardant standards; fourth, easy installation, modular design greatly shortens the construction period; finally, it also has good corrosion resistance and extends service life.
With these advantages, PU sandwich panels are widely used. In the construction field, it is the preferred enclosure material for industrial plants, cold storage, and clean room; in the transportation industry, it is used for heat insulation of refrigerated trucks and containers; in the construction of integrated houses and mobile board houses, it is also favored for its lightness and high efficiency. From severe cold to scorching heat, Propanel’s PU sandwich panels always protect the temperature of space and structural safety with excellent performance.
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