Polyurethane rigid foam

       Polyurethane rigid foam is a high-density closed-cell plastic with extremely low thermal conductivity (0.018-0.028 W/(m·K)), high strength, and waterproof flame-retardant properties.Manufactured through continuous foaming or molding processes, widely used in building exterior insulation, cold chain logistics cold storage, pipeline insulation, and industrial equipment cold preservation.$10$The closed-cell rate exceeds 90%, with a compressive strength of up to 300 kPa. It is compatible with the eco-friendly foam technology without fluorine and meets low-carbon and energy-saving requirements.Compared to soft foam, rigid foam emphasizes insulation and structural support functions.