1. Rigid polyurethane board has low thermal conductivity and good thermal performance. When the bulk density of rigid polyurethane is 35～40kg/m3, the thermal conductivity is only 0.018g～0.023w/(m·k), which is about half of EPS, which is the lowest thermal conductivity of all insulation materials.
2. Rigid polyurethane board has moisture-proof and waterproof performance. Rigid polyurethane has a closed cell ratio of over 90%, which is a hydrophobic material and will not increase the thermal conductivity due to moisture absorption, and the wall will not seep water.
3. Rigid polyurethane is fire-resistant, flame-retardant and high temperature resistant. After adding flame retardant, polyurethane is a kind of flame-retardant self-extinguishing material. Its softening point can reach more than 250 degrees Celsius, and it decomposes only at higher temperatures. In addition, polyurethane will be on the surface of its foam when it burns. Ash is formed, and this layer of ash helps to insulate the foam underneath. Can effectively prevent the spread of fire. Moreover, polyurethane does not generate harmful gases at high temperatures.
4. Due to the excellent thermal insulation performance of the polyurethane board, the thickness of the outer protective structure of the building can be reduced under the same thermal insulation requirements, thereby increasing the indoor use area.
5. Strong resistance to deformation, not easy to crack, stable and safe finish.
6. Polyurethane material has stable porosity structure and basically closed-cell structure, which not only has excellent thermal insulation performance, but also has good freeze-thaw resistance and sound absorption. The average life of rigid foam polyurethane insulation structure can reach more than 30 years under normal use and maintenance conditions. Under normal conditions of use during the life of the structure, the structure will not be damaged under dry, humid, or electrochemical corrosion, and due to external factors such as the growth of insects, fungi or algae, or the destruction of rodents.
7. High comprehensive cost performance. Although the unit price of rigid polyurethane foam is higher than that of other traditional insulation materials, the increased cost will be offset by the substantial reduction in heating and cooling costs.
