Key advantages are as follows:
Polyurethane (PU) Sandwich Panels
This is the mainstream choice offering the best overall performance. It features a thermal conductivity as low as 0.022 W/(m·K) and a closed-cell rate exceeding 92%. It offers excellent thermal insulation, waterproofing, and deformation resistance, making it suitable for blast-freezing and low-temperature cold storage facilities operating between -45°C and -18°C. Long-term use significantly reduces refrigeration energy consumption, making it the preferred choice for large and medium-sized cold chain projects.
Rock Wool Sandwich Panels
This type offers the best fire resistance. Classified as a Class A non-combustible material, it withstands temperatures exceeding 1000°C. It is suitable for cold storage facilities housing hazardous chemicals-where strict fire safety regulations apply-and for cold storage units attached to high-temperature processing workshops. Additional vapor barrier and moisture-proofing treatments are required to prevent insulation failure caused by condensation.
Polystyrene (EPS/XPS) Sandwich Panels
This type offers the best cost-performance ratio, with an initial investment cost approximately 27% lower than that of polyurethane panels. It is suitable for fruit and vegetable preservation facilities operating above 0°C and for small, temporary cold storage units. Proper sealing of joints during installation is essential to prevent the degradation of thermal insulation performance in high-humidity environments over time.
