How Flame Retardants Make Plastics Do not Fear Open Flame?

How Flame Retardants Make Plastics Do not Fear Open Flame?

Why is the same plastic, just because of the addition of a little flame retardant, it can ensure that plastic products are not bad, polymer materials why the more fire the more vigorous, this is due to polymer materials in the combustion, gradually absorb the heat of external heat sources until it reaches the temperature of decomposition, after the heat, the destruction of polymer chain structure, the generation of free radicals to make it dissolve quickly, and release flammable small molecules particles and gas, when When the flammable small molecule particles spread to the air and mixed with oxygen to a certain concentration, under sufficient heat combustion, part of the heat is transferred to the substrate, thus burning more and more vigorous, that the mechanism of flame retardant, easy to understand is to isolate oxygen, reduce the ignition point.

The flame retardant mechanism in the market is also divided into four categories: meteorological flame retardant mechanism, flame retardants in the decomposition of a large number of inert gas, the diffusion of these gases dilute the oxygen and combustible materials in the air, some gas specific gravity will be very large, sink below, forming a gas protective layer to ease the burning of polymer.

The second major category is the solid image flame retardant mechanism, flame retardant decomposition when heated or flame retardant based on the reaction of the substrate, forming a dense layer of carbon, this carbon layer has a combined effect, slowing down the transfer of heat and the external diffusion of small molecules and particles inside the material.

The third category is the free radical abort principle that polymer heating, generated so that the polymer link chain decomposition of free radicals and part of the flame retardant to generate particles, in order to capture these radicals and the last is to abort the heat transfer. When the material is heated, the flame retardant added to it will be preferentially decomposed, and in the decomposition process, it will absorb a lot of heat to slow down the material burning.

The above is the interpretation of all the content, to learn more about wire and cable flame retardants, fabric flame retardants, rubber flame retardants, plastic flame retardants, please continue to pay attention to our website.