... fiber of anti-acid, alkali, abrasion and chemicals; 4. Containing moisture in the flue gas; 5. under the condition of 190°~232 ... retentively and internal chemical resistance, which keeps good filter efficiency in the harsh environment, and reaching longer using life. PPS ... is the ideal filter material for the pulsate dedusting precipitator in the coal fired boiler, waste incinerator, powder and coal ...