The flame retardant is a composite material based on resin and rubber, which contains a large amount of organic compounds and has certain flammability. Flame retardants are a class of additives that can prevent polymer materials from igniting or inhibiting flame propagation. The most commonly used and most important flame retardants are compounds of phosphorus, bromine, chlorine, antimony, and aluminum. Flame retardants can be divided into two types: additive type and reactive type according to the use method. Additive flame retardants mainly include phosphate esters, halogenated hydrocarbons and antimony oxide. They are blended into the composite material during the processing of the composite material, which is easy to use and has a large adaptability but has an impact on the performance of the composite material. The reactive flame retardant is added to the polymerization system as a monomer raw material during the polymer preparation process, and it is compounded to the polymer molecular chain by chemical reaction, so it has a small impact on the performance of the composite material and flame retardancy lasting. Reactive flame retardants mainly include phosphorus-containing polyols and halogenated anhydrides.

Nylon flame retardants used in composite materials should have the following properties: ① high flame retardant efficiency, can give the composite material good self-extinguishing or flame retardancy; ② have good compatibility, can be a good phase with the composite Content and easy to disperse; ③ has a suitable decomposition temperature, that is, does not decompose at the processing temperature of the composite material, but can quickly decompose when the composite material is thermally decomposed to exert the flame retardant effect; ④ non-toxic or low-toxic, odorless No pollution, no toxic gas is generated during the flame retardant process; ⑤ When used with composite materials, it does not reduce the mechanical properties, electrical properties, weather resistance and heat deformation temperature of the composite materials; ⑥ Good durability, can be retained in the composite for a long time Material products, play its flame retardant effect; ⑦ a wide range of sources and low prices