Deflamo AB reports successful test results in vinyl wall coverings for a biodegradable flame retardant.
Deflamo's Apyrum is a proprietary, patented mixture of carboxylates, carbonate, pyrophosphate and energy absorber. Deflamo, based in Malmo (umlaut on o) says it is environmentally friendly and could replace more hazardous flame retardants.
Alkor Draka S.A.S. of Liancourt, France, has been trialling Apyrum and says it seems it can provide the same or better results in flame retardance as antimony trioxide in to now uses. Alkor Draka is a major producer of flexible PVC films in Europe.
Deflamo says Apyrum's efficiency relies on the importance of particle size and distribution and achieving a balance with the substrate in which it is mixed. In use, it consumes energy to cool the substrate. It binds with oxygen to reduce the amount available for burning and creates a layer of char that suffocates the substrate and reduces fumes and dripping, the company explains.
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