The nylon ties that can be flame retardant are made of a special material. Halogen-free flame retardant nylon: The more widely used halogen-free flame retardants in nylon are red phosphorus and melamine salts. Halogen-free flame retardant nylon products have excellent flame retardant performance, and the flame retardant level reaches UL94V. It has low precipitation, anti-drip, high electrical performance and excellent heat resistance, high CTI value, good electrical performance, high impact strength, friendly to the environment and environmental protection. Suitable for electrical connectors. By adding brominated flame retardants or halogen-free flame retardants compounded with European ROHS standards to the material to improve the flame retardant properties of the composite material. Including UL I 94V-O class test and V I 1, V I 2 class test. This granulated nylon can withstand a processing temperature of 500F (260°C). The introduction of triaryl phosphorus oxide on the molecular chain of nylon, such as bis(4-carboxyphenyl)phenyl phosphorus oxide, bis(4-hydroxyphenyl)phenyl phosphorus oxide, the formation of copolymers for durable flame retardant materials . For example, bis(4-carboxyphenyl)phenyl phosphine oxide (BCPPO) was used as the copolymer monomer, and BCPPO was introduced into PA66 by co-condensation reaction to achieve permanent flame retardant to PA66. The presence of the structural unit of BCPPO on FR-PA66 was determined by IR and DSC analysis, indicating that the co-condensation reaction between BCPPO and PA66 occurred.The introduction of BCPPO improved the thermal stability of PA66 and had a certain flame retardant effect. The phosphorus-containing nylon 66 condensed with adipic acid, hexanediamine and bifunctional group of chlorinated spirocyclic phosphoric acid cooled by the boundary. the combustion test showed that: the product has the characteristics of difficult to ignite, easy to self-extinguish, does not produce smoke and molten drops, etc., is a flame retardant effect and no pollution to the environment polymer compounds.