PUR
The most effective thermal insulation material is hard polyurethane foam (PUR).
Hard polyurethane insulation is produced by mixing and chemically reacting polyalcohols (polyol) and isocyanates (MDI) in a special high-pressure machine. CO2 is used as a foam blowing agent - it is therefore a CFC-free technology.
Mature PUR achieves the following parameters:
| Specific gravity of the core | min 65 kg/m³ |
| Compressive strength | min 0,3 Mpa |
| Thermal conductivity (50 °C) | max.0,033W/mK |
| Heat resistance | fron 50 to 140 °C |
| Water absorption | max 10% |
| Cell closure | min 90% |
| Foam blowing agent | CO2 (CFC-free system) |
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