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06/Aug/2018
Fraunhofer LBFs and PINFAs research activities on the recycling of plastics containing halogen free flame retardants
Recycling is an important issue with regard to the
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01/Sep/2017
New pinfa video: How effective are flame retardants for fire safety?
A new video from PINFA, the Phosphorus, Inorganic
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04/Aug/2017
Recycling of plastic waste - curse or a blessing?
In our fast-paced „throwaway society“
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31/May/2017
Plastics for E&E applications, “fuse box meets dryer” 2017 in Würzburg
As in previous years „Kunststoffzentrum (SKZ
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01/Aug/2016
pinfa's first workshop in China confirms interest in halogen free FRs
In June 2016, over 250 people from academia, indus
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02/Nov/2015
1st International Asia-Oceania Symposium on Fire Safety Materials Science and Engineering (AOFSM’1 2015)
The 1st International Asia-Oceania Symposium on Fi
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Fire behaviour

How does fire develop?

If you examine the fire progress over time, it can be seen that it often starts out small and slowly but then increases ever more rapidly as more fuel is involved.

How does this look like in a building fire?


An ignition source ignites combustible material, which starts to burn, generating heat, and igniting additional material. The fire propagation is boosted by the increased heat release and temperature of the surroundings. The fire has grown to such an extent that the whole fire load in the room decomposes with the evolution of a flammable gas mixture. The gas ignition causes an extremely high, even explosive, fire spread over the entire room, called "flashover", which leads to the fully developed fire.

The fire now penetrates doors, walls, ceilings and windows and spreads to neighbouring rooms until the whole building is in flames. The room temperature exceed 1,000 °C and the entire fire load in the building burns. The fire has reached its peak and, depending on the fire load, it enters the decreasing phase in which the building is more or less rapidly burnt out.

Flame retardants act in the decisive phase of an initiating fire: they help to prevent ignition or flame propagation and thus flashover.