1, working temperature 190 ℃, the instantaneous working temperature 232 ℃, melting point 285 ℃, limit oxygen index of 34 ~ 35%. 2, oxygen levels at or below 15% of occasions are applicable. 3, fuel sulfur or sulfur oxide in flue gas, has proved its resistance to acid and alkali corrosion and chemical resistance of fiber. 4, containing moisture in the flue. 5, under the condition of the working condition of temperature 190 ℃ ~ 232 ℃, gas cloth at 5:1 do on-line ash removal and gas making offline soot cleaning cloth than 6:1, PPS filter bag with excellent performance record. PPS fiber with full strength properties and intrinsic chemical resistance, can keep good filtering performance in harsh environment, and achieve the ideal life. Filtering in coal-fired boiler, garbage incinerators and power plant fly ash dust, pulse dust precipitator, PPS filter mat is the ideal filter material.