-

Fire-retarded and pure polymeric materials were subjected to heat fluxes of
25 and 50 kW/m2 using cone calorimeter. The approach of the flashover conditions were computed from Kokkala and Ostman models. The fire parameters needed to be fed to the models were detemlined experimentally utilizing the method recommended by ISO/DIS5660 ASTM (E
1359-90). The results show that the flashover time could be estimated from Kokkala method quite accurately. The flashover time for the PP was found to increase with the increase of Mg(OH)2 content. However with PE, the trend was found to be different.