Polytetrafluoroethylene synthetic fiber filter bag is a unique material made of filter bag, in 240℃ continuous operating temperature, instantaneous 260℃ temperature conditions, resistance to all PH value range of acid and alkali erosion. Polytetrafluoroethylene synthetic fiber filter bag has excellent self-wetting, no moisture absorption and can withstand ultraviolet radiation. But the wear resistance of PTFE fiber filter material is general, so the filter bag frame has more stringent requirements (finish). PTFE fiber filter bag is more suitable for severe conditions requiring corrosion resistance and high service life of filter material.