Abstract:  The cone calorimeter was used to study the ignition time, heat release rate and total heat release of the typical car door materials (Polypropylene honeycomb board packing/cladding assembly) under different heat fluxes of 15, 25, 35, 45 kW/m2. By introducing fire performance index (FPI) and fire growth index (FGI),using Petrella evaluation system, the fire hazard of assemblies was compared and analyzed. The results showed that the PP-PVC is difficult to be ignited, with high fire performance index and low fire growth index, so the PP-PVC assembly has lower fire hazard.

Key words: cone calorimeter, car door plank, combustion characteristic, fire hazard