Flame retardant fabric is a special fabric that can delay flame combustion. It does not mean that it does not burn when in contact with fire, but can extinguish itself after isolating the source of fire. It is generally divided into two categories. One type is the fabric that has been processed to have flame retardant properties, commonly seen in polyester, pure cotton, polyester cotton, etc; Another type is that the fabric itself has a flame retardant effect, such as aramid, nitrile cotton, DuPont Kevlar, Australian PR97, etc. According to whether the washed fabric has flame retardant function, it can be divided into disposable, semi washable, and permanent flame retardant fabrics.