There are many kinds of flame retardants, and the flame retardant effect is also different. However, the use of flame retardant does not directly change the properties of the material, making it non combustible. Let's first understand the concept:
        Non flammability refers to the fact that the substance itself cannot burn, while flame retardancy refers to the fact that it has no combustion ability or is not easy to burn.
        Flame retardants can sometimes be close to or in contact with fire sources, such as asbestos flame retardants, gasoline need to be fireproof. Flame retardant can also be understood as fire resistance, which is different from non flammability. Incombustibility means that a substance is incombustible and not easy to burn.
        All flame retardant materials are not flammable. The main flame retardants are organic flame retardant, inorganic flame retardant, halogen flame retardant and non halogen flame retardant. Organic flame retardants are represented by bromine, nitrogen, red phosphorus and compounds, while inorganic flame retardants are mainly antimony trioxide, magnesium hydroxide, aluminum hydroxide and silicon.
        With the development of material industry, the research of polymer flame retardant materials emerge in endlessly. Endothermic effect the heat released in the combustion process heats up the raw material and makes it reach the ignition point quickly. The principle of endothermic flame retardant is that the material needs to absorb a lot of heat in the combustion process, which can reduce the heating process of the material and make it difficult for the free radicals of vaporized combustible molecules to reach the ignition point, so as to prevent the combustion to a certain extent.
        According to the chain reaction theory of combustion, free radicals are needed to maintain combustion. Flame retardants can act on the gas-phase combustion zone and capture the free radicals in the combustion reaction, so as to prevent the flame from spreading, reduce the flame density in the combustion zone, and reduce the combustion reaction speed until the termination.