4.2 Article

Intrinsic flame resistance of polyurethane flexible foams: Unexpectedly low flammability without any flame retardant

Journal

FIRE AND MATERIALS
Volume 42, Issue 4, Pages 394-402

Publisher

WILEY
DOI: 10.1002/fam.2504

Keywords

cone calorimetry; FAR 25; 853; flame retardant free; flammability; FMVSS 302; LOI; polyurethane flexible foam; TGA

Funding

  1. European Horizon Research and Innovation Programme [CSJU-GAM-ED-2009-001, CS2-AIR-GAM-2014-2015-1, CS2-ECO-GAM-2016-2017-01]

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Virgin polyurethane flexible foams are widely assumed to be highly flammable materials. The flammability of three model polyurethane flexible foams suggests that this may not be universally true. Two of them show unexpectedly low flammability in the limiting oxygen index test and pass flammability tests such as FMVSS 302 and FAR 25.853. Cone calorimetric measurements at 25 kW/m(2) and 50kW/m(2) furthermore show a high resistance against ignition and demonstrate the self-extinguishing properties of these two virgin, flame-retardant-free, polyurethane flexible foams.

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