Polyurethane rigid foam

       Polyurethane rigid foam is a closed-cell high-density plastic foam with an extremely low thermal conductivity (0.018-0.028 W/(m·K)), high strength, and water-resistant flame-retardant properties.Manufactured through continuous foaming or molding processes, widely used in the insulation of building exterior walls, cold chain logistics cold storage, pipeline insulation, and cold preservation of industrial equipment.$10$The closed-cell rate exceeds 90%, with compressive strength up to 300 kPa, and is compatible with the non-fluorine environmental protection foaming technology, meeting low-carbon and energy-saving requirements.Compared to soft foam, rigid foam emphasizes thermal insulation and structural support functions.