Polyester is widely used in the manufacture of clothing and industrial products. Flame retardant polyester has a wide range of applications because of its permanent flame retardancy. In addition to playing an irreplaceable role in industrial textiles, interior decoration of buildings and interior decoration of vehicles, it also plays a lot of roles in the field of protective clothing. According to the national standard of flame retardant protective clothing, metallurgical, forestry, chemical, petroleum, fire protection and other departments shall 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