Summary:EPS is the abbreviation of expandable polystyrene board. It ...
EPS is the abbreviation of expandable polystyrene board. It can be made into core material foam products of different densities and shapes, and can also produce foam boards of various thicknesses. EPS foam is a thermoplastic material. Each cubic meter of volume contains 3 million to 6 million independent airtight bubbles, and the volume of air contained is more than 98%. Due to the small thermal conductivity of air, it is enclosed in foam plastic. And can not convection, so EPS is a kind of material with excellent thermal insulation performance. However, eps foam sandwich panels also have certain safety hazards.
1. Other situations of EPS that increase the risk of fire
The fire may spread covertly in other directions through the EPS in the double-layer color steel plate without being detected. The EPS color steel sandwich panel itself may greatly increase the fire load of the building. According to relevant information, the fire load caused by the 0.05m thick foam core material commonly used in sandwich panels may increase the fire load of the entire building by 9% to 30%. In some buildings that require extensive use of combustible sandwich panels to enhance thermal insulation, the fire load of the sandwich panel itself may even be 1.5 times the fire load caused by other items in the building.
2. The threat of EPS color steel sandwich panels to trapped and rescued personnel in the fire scene
Toxic gases such as CO produced by combustion are a great threat to escape or rescue personnel in the building on fire. CO is the main cause of death in fires. CO is absorbed by the blood through the lungs. Since the affinity of hemoglobin for CO is greater than the affinity for O, the oxygen content in the blood is reduced, resulting in insufficient oxygen supply, which can easily poison the people present. died. The black smoke generated by the combustion weakened the visibility of the fire scene, caused great inconvenience to the vision of the people present, and even directly affected the development of escape and rescue work.
EPS color steel sandwich panels have low fire resistance and are prone to collapse, posing a serious threat to the safety of the people present. The EPS color steel sandwich panel is not easy to dismantle, and the collapse will cause great inconvenience to the fire scene search and rescue, fire-fighting operations, and fire cause investigation. The combustion heat of EPS is 40180kJ/kg, which is greater than the calorific value of wood. The flame temperature of EPS is 2210℃.
The burning speed of polystyrene is 12.7-63.5mm/min, and the burning speed of EPS with different foaming ratios is different, which is much higher than that of polystyrene. In most cases, EPS is incomplete combustion, which produces a lot of smoke and can produce harmful gases such as CO2 (carbon dioxide) and CO (carbon monoxide). Therefore, while EPS brings convenience to plastic building materials, it also brings hidden dangers.