Abstract
Polyurethane foam is an important branch of building insulation materials, but its poor fire performance easily to lead to smoldering. This is conducted under condition of natural convection and heating time change of smoldering experiments on the smoldering experimental compartment. Use the thermocouple to measure the temperature changes inside the material. The results shows that, the heating time is shorter, smoldering into flame combustion is less complete, when time is short enough, smoldering extinguished; and in the vertical smoldering propagation, as time is shortened, smoldering into open fire’s position is upward. Experiment and analysis can be nicely displayed the effect of heating time on smoldering process.
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