PU board, also known as polyurethane sandwich panel or polyurethane composite panel, is a composite board with rigid polyurethane foam as the thermal insulation layer, featuring double metal faces, single metal face, or non-metal faces-5-. The product complies with national standard GB/T 23932-2009 and is widely used in wall and roof envelope systems for industrial plants, logistics warehouses, and prefabricated buildings-44.
Key Features:
Excellent Thermal Insulation: The core material has a thermal conductivity as low as 0.018–0.023 W/(m·K), making it one of the lowest among all insulation materials-46. 1cm of rigid PU foam provides insulation equivalent to 1.5cm of XPS, 2cm of EPS, or 30cm of brick wall-2.
Waterproof & Moisture-Resistant: With a closed-cell rate exceeding 95%, it is a hydrophobic material that does not absorb moisture or increase thermal conductivity-46-2.
Fire-Resistant: Achieves a B1 fire rating; when exposed to flame, it forms a carbonized layer on the surface to effectively prevent flame spread--2.
Lightweight & High Strength: Low density (40–60kg/m³), compressive strength ≥160kPa, and a service life of over 30 years-46.
Easy Installation: Integrates load-bearing, insulation, fireproofing, and waterproofing in one product, eliminating the need for secondary finishing and shortening construction cycles-1.
Main Applications:
PU boards are widely used in wall and roof envelope systems for industrial plants, logistics warehouses, cold storage facilities, and prefabricated buildings--46. They are also applied in HVAC duct insulation, refrigerated truck insulation layers, and chemical tank insulation-46. With its outstanding comprehensive performance, PU board is promoted by the Ministry of Construction as a high-efficiency energy-saving building envelope material
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