1. Rigid polyurethane has a low thermal conductivity and excellent thermal properties. At a density of 35 to 40 kg/m³, its thermal conductivity is only 0.018 to 0.024 W/(m·k), roughly half that of EPS, making it the lowest among all insulation materials.
2. Rigid polyurethane features moisture-proof and waterproof properties. The closed cell rate of rigid polyurethane exceeds 90%, classifying it as hydrophobic material. It will not increase the thermal conductivity due to moisture absorption, and the walls will not leak water.
3. Rigid polyurethane is fire-resistant, flame-retardant, and heat-resistant. After adding flame-retardant agents, it becomes a self-extinguishing material with difficulty in combustion, with a softening point exceeding 250 degrees Celsius, decomposing only at high temperatures. Additionally, during combustion, polyurethane forms carbon deposits on the surface of its foam, which help isolate the underlying foam. It effectively prevents the spread of flames. Moreover, polyurethane does not produce harmful gases at high temperatures.
4. Due to the excellent thermal insulation properties of polyurethane panels, the same thermal insulation requirements can be met with reduced thickness of the building's outer protective structure, thereby increasing the usable indoor area.
5. High resistance to deformation, crack-resistant, and stable & safe surface finish.
6. Polyurethane materials have a stable porosity structure, predominantly closed-cell, offering excellent thermal insulation properties, as well as good frost-heating resistance and sound absorption. The average service life of polyurethane foam insulation is over 30 years under normal use and maintenance conditions. It can maintain its integrity throughout the structural lifespan, even under external factors such as dryness, humidity, electrochemical corrosion, and damage from insects, fungi, algae, or rodents.
7. High overall cost-effectiveness. Although the unit price of rigid polyurethane foam material is higher than that of other traditional insulation materials, the increased cost will be offset by the significant reduction in heating and cooling expenses.
