POLYURETHANE SYSTEMS: A SAFE INSULATION AGAINST FIRE

 

 

 

 

 

 

 

 

 

 

 

 

Polyurethane systems, in all their applications (projected, injected or in panels), have a good behaviour against fire. However, the reaction against fire of the constructive solution will depend, among other factors, on the coating material to be applied.

Therefore, we should wonder if it is possible to build an efficient building with polyurethane and, at the same time, to make it safe. Next, we will check the qualities of the polyurethane systems against fire.

 

Safe insulation against fire

 

The polyurethane systems industry tries to contribute to the safety of buildings, not only in terms of insulation but also in their behaviour against. According to PU Europe, the safety of a building in case of fire should be measured taking into account all the constructive elements, since analyzing the behaviour of the materials separately can lead to conclusions that do not match the actual result.

The reaction against fire of a specific construction product is a poor indicator of the safety of a whole building in case of fire. This can be verified in studies such as the one carried out by ANPE, in which the behaviour of combustible thermal insulation (polyurethane) and non-combustible (glass fibres) products in real scenarios was compared.

The results of this study showed that although the safety classification in case of fire was better for the mineral fibre product (A1) compared to the polyurethane product (B-s1, d0), it was the polyurethane constructive system that showed better results in test B (t2). Contrary to what the classification showed, polyurethane systems remained below the required limit while mineral fibre did not prevent the spread of fire or the persistence of flames.

 

Fire behaviour of PIRM CLASE 1 polyurethane system

 

The PIRM CLASE 1 polyurethane system has an excellent fire performance thanks to its highly reticulated cyclic structure. When it comes into contact with the flame, this structure creates a carbonaceous surface mesh that protects the interior of the insulation and prevents its inflammation. The protection process stops automatically when the panel is no longer exposed to fire. In this way, the interior of the polyurethane system remains protected and, its insulation properties and protection of the building remain intact.

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