Polyester filament has a wide range of uses, and is widely used in the manufacture of clothing and industrial products. Due to its flame retardancy, flame-retardant polyester has a wide range of applications. In addition to its irreplaceable role in industrial textiles, architectural interiors, and vehicle interior decoration, it also plays a lot of roles in the field of protective clothing. According to the national standards for flame-retardant protective clothing, metallurgy, forestry, chemical, petroleum, fire-fighting and other departments should use flame-retardant protective clothing. The number of people who should use flame-retardant protective clothing in China is more than one million, and the market potential of flame-retardant protective clothing is huge. In addition to pure flame-retardant polyester, it can produce flame-retardant, waterproof, oil-repellent, anti-static and other multi-functional series products according to the special requirements of users. For example, waterproof and oil-repellent finishing of flame-retardant polyester fabric can improve the functionality of flame-retardant clothing; use flame-retardant polyester and conductive fiber to produce antistatic flame-retardant fabric; use flame-retardant fiber and high-performance fiber for blending and interweaving , It can produce high-performance flame-retardant fabrics; flame-retardant fibers are blended with cotton, viscose and other fibers to improve the comfort of protective clothing and reduce secondary burns.