Ultra-thin or thin steel structure fire retardant coating fire insulation principle:
Coated on the steel structure of ultra-thin or thin steel structure fire retardant coating fire insulation principle is the fire retardant coating layer when the expansion of foam, foam layer is not only isolated oxygen, but also because of its loose texture and has good heat insulation performance, can delay heat transmission to be protected base material speed; According to the analysis of the physical and chemical principles, the process of the foam layer produced by the expansion of the coating is endothermic reaction because of the expansion of the volume, and also consumes the heat when burning, which is conducive to reducing the temperature of the system, these aspects of the role, so that the fireproof coating has a significant effect of fire insulation.
Fire insulation principle of thick steel structure fire retardant coating:
Coating on steel members of thick steel structure fire retardant coating fireproof heat insulation principle of fire retardant coating is affected by the fire when the coating is basically not volume changes, but the coating is very low thermal conductivity, delay the speed of heat to be confirmed base material, coating itself is non-combustible, fire retardant coating for steel members barrier and prevent thermal radiation effect, avoids the flame and high temperature direct invasion of steel members. There are some components of the coating in the fire mutual reaction and the generation of non-combustible gas process is endothermic reaction, but also consumes a lot of heat, is conducive to reducing the temperature of the system, so the fire prevention effect is significant, to the steel to play an efficient fire insulation protection. In addition, this kind of steel structure fire retardant coating by fire coating does not occur volume change to form a glaze protective layer, it can play the role of oxygen isolation, so that oxygen can not be protected by flammable substrate contact, so as to avoid or reduce the combustion reaction. However, the thermal conductivity of the glaze protective layer generated by this kind of coating is often large and the heat insulation effect is poor. In order to achieve a certain fire insulation effect, thick coating type fire retardant coating is generally thicker to achieve a certain fire insulation performance requirements.