Flame retardant foams with UltraCarb

Customers use UltraCarb in the manufacture of NBR/PVC flexible elastomeric foams as a flame retardant filler.

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Melissa Bartz

Melissa Bartz

Inside sales / Sales coordination Americas

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Flexible elastomeric foams

The industry widely uses flexible elastomeric foams (FEF’s) for thermal and acoustic insulation in air-conditioning and heating installations. Such materials are more or less solely based upon two different rubbers:

  • nitrile butadiene rubber (NBR), often blended with polyvinyl chloride (PVC)
  • or ethylene propylene diene rubber (EPDM).

NBR and NBR/PVC based FEF’s are the most widespread polymers for standard FEF’s while companies use EPDM mainly for applications requiring higher temperature resistance, e.g. solar applications.

PVC resins are blended with NBR to provide increased resistance to ozone and abrasion. Also, PVC has the effect of increasing the level of fire retardancy, and you can further improve this by the addition of flame retardant fillers.


Selecting the correct Flame Retardant(FR) filler

It is essential that the flame retardant fillers are sufficiently fine enough to maintain a good foam structure. At the same time, the filler should have a relatively high surface area per gram because this benefits the bubble structure inside the foam.

LKAB Minerals’ UltraCarb LH15 C and UltraCarb 1251 meet these criteria perfectly.

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