Flexible Polyurethane Foam Combustion Performance And Fire Hazard Analysis

Flexible polyurethane foam is widely used in many applications in the life and production, because of its excellent physical properties. But this kind of ma-terial is very flammable. It has become the most important reason to restrict its development. It is important to seek appropriate method for soft polyurethane products'combustion performance analysis and fire hazard judgment.In this thesis the fire properties for flexible polyurethane foam is studied by cone calorimeter test, SBI test and the oxygen index determination test methods based on the solid materials heat conduction and flame diffusion theory. A lot of experiment data is collected, based on these data, flexible polyurethane foam's combustion characteristics and fire hazard is analyzed.A comprehensive characterization of the heat release rate and burning beha-vior of flexible polyurethane foam have been carried out at different levels of heat flux using cone calormetry. The result shows that, in the cone calorimeter test, the greater environment irradiance of the test has, the shorter ignition time flexible polyurethane foam take. With the increase in the levels of irradiance, peak heat release rate (PHRR) and averages heat release rate were found to increase. Gas release rate of CO and CO2 was found to increase when the levels of heat flux increase. Cone calorimeter test results obtained very similar with SBI test results. It can reflect the true fire burning of materials. The oxygen index determination test results can only show parts of the combustion performance. It can not predict the performance in the burning fire.This paper also propose that the combustion performance such as heat release rate, light properties of the flexible polyurethane foam should be added into GA 303.