1. Analysis of the flame retardant principle of phosphorus flame retardants
Phosphorus flame retardants will decompose and produce metaphosphoric acid and other substances during the combustion of polymers, promote the formation of carbon layers, and can also produce free radicals that are captured in the air. The combustion chain reaction is terminated and it plays a flame retardant role in the condensed phase and gas phase.
2. Analysis of the flame retardant principle of nitrogen flame retardants
Nitrogen flame retardants will decompose during the combustion of polymers, produce a large amount of other non-combustible gases, thereby achieving the purpose of diluting the combustible gases in the air. And take away some heat to achieve a flame retardant effect.
3. Analysis of the flame retardant principle of inorganic hydroxide flame retardants
Inorganic flame retardants add inorganic elements with intrinsic flame retardancy to flame retardant substrates in the form of single substances or compounds, and fully integrate with polymers in a physically dispersed state, and act as flame retardants through chemical or physical changes in the gas phase or condensed phase to play a flame retardant role.
4. Analysis of the flame retardant principle of intumescent flame retardants
Plastics containing intumescent flame retardants will form a carbon foam layer on the surface of the flame retardant, which has the functions of heat insulation, oxygen isolation, smoke suppression, and dripping. It has excellent flame retardant effect and contains low smoke, low toxicity, and no corrosive gas.
5. Promote the formation of carbon layer
When the material burns, zinc borate helps to form a porous carbon layer. The carbon layer can be stabilized by boron trioxide. At high polymer combustion temperatures, zinc borate can also react with aluminum hydroxide to form materials such as glass and ceramics, which helps to insulate and prevent air from diffusing into the material and prevent the formation of molten droplets.
