PUR
is a closed-cell foam and has very good insulation values (λ = 0.023 W/mK). The best insulation values are achieved by gas-diffusion-tight PUR rigid foam (λ = 0.022 W/mK). It is coated on both sides with a 0.05 mm thick aluminium foil or thin mineral fleece and is therefore vapour-tight. PUR insulation boards usually have a vapour diffusion resistance factor of 10 to 150 (boards with a specially applied diffusion-tight top layer also achieve a value of up to μ = 18570). Because polyurethane has a closed-cell structure, it absorbs only a small amount of water. The soundproofing properties are very poor due to the high dynamic stiffness. In combination with our own acoustic panels in sandwich panels, the sound-absorbing properties can be significantly increased. PUR rigid foam insulation material is available in different fire behavior classes. In the event of a fire, heavy smoke can develop.
Recyclability / Demountability
If polyurethane rigid foam boards are removed non-destructively, they are reusable, but older products with FC WK are problematic. Polyurethane can be chemically and materially recycled. Alternatively, panels can also be granulated and reassembled into new panels using PU adhesive. However, the frequent lamination, e.g. with aluminum, makes separate collection and processing very difficult. Thermal recycling takes place in waste treatment plants.
Areas
of application Areas of application for PUR insulation boards in house construction are primarily on-roof (as above-rafter insulation), pitched roof, flat roof or floor insulation. Floor ceilings can also be insulated with the panels. For boiler, pipe and boiler insulation, special elements such as semi-circular shells are also offered. The most important application is the insulation of industrial halls.
... read more on umweltberatung.at - Die Umweltberatung
red= Areas of application, grey= not possible
