The mechanism of the protective layer, that is, at the temperature of the burning state, the flame retardant forms a non-combustible protective layer to cover the burning object, thereby isolating the air and achieving the flame retardant effect. Such as zinc borate, halogenated phosphorus flame retardants, etc. The mechanism of non-combustible gas is that the flame retardant can immediately decompose the non-combustible gas at normal temperature to dilute the combustible gas or dilute the oxygen concentration in the combustion area to prevent combustion, such as halogen-containing flame-retardant catalysts. Cooling mechanism, that is, the flame retardant can melt the solid surface layer of the polymer at a lower temperature to absorb Read more