& nbsp; & nbsp; & nbsp; Fourth, strict attention to aging storage program foams, for flexible polyurethane foam blocks production, ripening new bubble is a high incidence of fire accident. Due to the large foam block internal temperature is high, the heat long duration, usually reaches an internal temperature of maximum time is about 30 ~ 60min, and 3 ~ 4h or longer to begin a slow decline, during this time, new bubbles have left the production line and into the often overlooked curing the reservoir, without good control measures, will easily lead to a fire. Data report, molecular weight 5,000 yuan alcohol, 4.7 parts of water and 8 parts of F-11, TDI index when massive soft foam 1.07 isocyanate production density of 22kg / ㎥, the new foam found a small amount of yellowish after 2h smoke, although the foam surface temperature is not high, but the foam inside is very dangerous in the early stages of decomposition, the temperature at 200 ~ 250 ° C or so, has begun to spontaneous combustion.