The exhaust gas from chemical reaction vessels containing chlorine and ammonia has a highly corrosive effect on filter materials. After being impregnated with PTFE emulsion, the fiber surface forms a dense protective film. After 48 hours of alternating aging with ***, the strength retention rate remains above 85%; its flame retardancy index reaches UL94 V0 level, with an oxygen index of 34%, and it will not ignite even when exposed to high-concentration organic solvent sparks; the surface resistance of the coated film is reduced to 10?Ω, effectively preventing static accumulation and ensuring safe operation in flammable dust conditions; it can operate continuously for two years without replacement, providing the enterprise with a safe, stable, and low-cost exhaust gas treatment solution.
Manufacturers of coated PPS filter bags typically follow the following process:
Fiber Selection: Opt for ***PPS fiber to ensure the material's temperature resistance and corrosion resistance.
(2) Needling Technology: The fiber is processed into a base fabric through a needling machine, ensuring the filter bag's strength and breathability.
(3) Coating Treatment: Apply a PTFE (Polytetrafluoroethylene) microporous membrane to the base fabric surface to enhance filtration efficiency and reduce dust adhesion.
(4) Sewing Process: Sewed with high-temperature-resistant thread to ensure the filter bags do not come apart or deform under high-temperature conditions.
