XPS foam board (extruded polystyrene board) has excellent thermal insulation performance, which is mainly reflected in the following aspects:
1. Low thermal conductivity
The thermal conductivity of XPS foam board is extremely low, usually between 0.024~0.035 W/(m·K), which means that it can effectively prevent the transfer of heat. This property gives XPS foam board a significant advantage in the field of insulation, ensuring a stable indoor temperature and reducing energy consumption.
2. High closed cell ratio
The closed cell rate of XPS foam board is as high as more than 99%, and a continuous vacuum layer is formed inside. This structure greatly reduces the channels for air flow and heat transfer, ensuring long-lasting and stable thermal insulation performance. In contrast, other insulation materials, such as foamed polyurethane, have a lower cell closure rate, so XPS foam board has an advantage in terms of thermal insulation effect.
3. Stable heat preservation effect
XPS foam board can not only maintain more than 85% insulation effect in high humidity environment (such as 70% relative humidity), but also its thermal insulation performance is still stable after long-term use. This is due to its excellent durability and stable chemical properties. Experiments have shown that the thermal insulation performance of XPS foam board is still very high after multiple freeze-thaw cycles, showing excellent freeze-thaw resistance.
4. Comparison of thermal insulation effect
Practice has proved that the thermal insulation effect of XPS foam board is very significant. For example, a 20 mm thick XPS extruded insulation board is equivalent to a 50 mm thick expanded polystyrene, or a 120 mm thick cement perlite. This is further proof of the excellent performance of XPS foam board in terms of thermal insulation performance.
5. Wide range of applications
Due to its excellent thermal insulation performance, XPS foam board is widely used in various occasions that require thermal insulation, such as building roof insulation, steel structure roofing, building wall insulation, building ground moisture retention, square ground frost heave control, central air conditioning ventilation ducts, geothermal engineering, highways, airport runways, large cold storage and car interior decoration insulation and other fields.
