Non-halogen flame retardants refer to those that do not contain halogens (such as fluorine, chlorine, bromine, iodine, etc.). They can inhibit the spread of flames, slow down the burning rate, and even self-extinguish under certain conditions through physical or chemical effects during the combustion process. Non-halogen flame retardants usually have high thermal stability and chemical stability, and can maintain their flame retardant properties at high temperatures.