KEPIN building materials fire testing instruments to tell you: why can fire fire retardant paint?
Why do fire retardant paint can prevent fire spread in a certain period of time. Analysis according to existing three kind of fire retardant paint.
(KEPIN building materials fire test instrument co., LTD., specializing in the production of related fire fire flame retardant test instruments and equipment. Please contact us if necessary.)
Fire retardant paint, compared with general paint is essentially the same in terms of physical properties, different is it after drying, the film itself is not easy to burn, in case of fire, can delay the flame spread to the paint on the fuel, has certain fire performance. According to the test: paint and fire retardant paint besmear is on board, respectively, after drying, baking, with the same flame general paint wood, less than 2 minutes and paint a burning; With the expansion of the fire retardant paint board, after 2 minutes only appear smoldering phenomenon, let stand out immediately after 30 seconds; Inert gas expansion type fire retardant paint coating of wood, even bake for 15 minutes, even smoldering phenomenon does not appear. This shows, with fire protection coating on the surface, in the event of fire, is to stop the fire spreading in a certain time, protect the surface, thus for fire fighting for precious time.
Why do fire retardant paint can prevent fire spread in a certain period of time. Analysis according to existing three kind of fire retardant paint, the reasons are as follows:
Inflating: this kind of resin in the fire retardant paint, using foam material, sodium silicate, or join foaming agent, boric acid, change when they are heated, make coating expansion bubbling, form a hard shell, increase the fire source and the distance.
Not inflating: this kind of fire retardant paint choose chloride (PVC, chlorinated rubber, PVC, chlorine acetate materials such as PVC copolymer as resin, they encounter after the fire, thermal decomposition, non-combustible gases, such as chlorine, carbon dioxide, will be around flammable gas dilution, make the fire. Sometimes in the paint add ammonium carbonate, ammonium chloride, ammonium phosphate and other chemicals. They also can produce non-flammable gas when it is heated, but the addition of these chemicals are often have a certain influence on the physical properties of the paint film, must be reasonable use.
Expansion of inert gas type: this kind of fire retardant paint made with four chlorinated benzene anhydride alcohol resin, can cause it to expand when heated foaming, and can produce the non-flammable gas such as chlorine, both the above two kinds of effect, so the effect is good, refractory time is longer. The other place, used in fire retardant paint pigments, also want to block and isolation of heat is given priority to, such as asbestos powder, antimony white powder, mica powder, titanium dioxide, etc. Of antimony white powder, the infrared reflection ability is stronger, when the flame can reflect heat, is widely used in the fire retardant paint.
Fire retardant paint, as a new type of paint, also there are some disadvantages, such as high cost, some varieties of fireproof paint physical performance is not ideal, and so on. But these shortcomings, will constantly overcome through practice, the need of fire.
KEPIN building materials fire test instrument co., LTD., specializing in the production of related fire fire flame retardant test instruments and equipment. If necessary, please contact us.
