Polyurethane foam is undoubtedly an excellent insulating and sealing material. There are numerous types of this product in the market, therefore it is worth learning more about their properties. Find out how particular types of polyurethane foam differ from each other and what is their application. At first, let’s talk about the properties of PU foam.
Polyurethane Foams and Their Properties
What properties does PUR foam have? Above all, it demonstrates good thermal parameters — it is resistant to a wide range of temperatures (from –200°C to +135°C). Average thermal conductivity coefficient of polyurethane foam is 0.026 W/m2, and the most favorable apparent density after the curing of rigid foam is usually 35 – 50 kg/m³.
The greatest advantage of PUR foam is its excellent thermal insulation properties. Polyurethane foam is also resistant to relatively high loads, as well as fungi and mould. Thus, it is undoubtedly an ideal material for any construction and renovation works, such as thermal and acoustic insulation, and — in the case of flexible polyurethane foam — fitting and sealing.
PUR foam provides perfect adhesion to both vertical and horizontal surfaces, and it has porous structure. Porous materials have hollow cavities inside. Porosity is a property that tells us about the volume and quantity of pores with certain diameter. Polyurethane foam is also characterized by a short treatment time and, after curing, it retains its chemical neutrality.
When it comes to disadvantages of the material, its relative flammability and low resistance to UV radiation are often mentioned.
Conclusion of PU Foam Properties
Whole name: Polyurethane foam
Temperature resistance: –200°C to +135°C
Co-efficiency of thermal conductivity: 0.026 W/m2
Average density: 35 to 50 kg/m³
Typical advantages: thermal insulation and soundproof
Disadvantages: relatively flammable, low UV resistant
Typical usage: refrigerators, reefer trailers, RV & caravans, temporary buildings, constructions