PTFE Coated Filter Bag

PTFE Coated Filter Bag is a high-efficiency upgraded filtration consumable designed for ultra-low emission and difficult-to-filter industrial dust conditions.It is manufactured by laminating a micron-level PTFE(Polytetrafluoroethylene)microporous membrane on the surface of conventional needle-punched filter felt such as polyester,PPS or P84.Different from ordinary untreated filter bags that rely on dust cake for filtration,the PTFE membrane achieves surface filtration with uniform micro-pore structure.It perfectly solves common industry pain points including fine dust penetration,sticky dust adhesion,high system resistance and incomplete ash cleaning.With outstanding chemical stability,non-stick performance and precise filtration accuracy,it has become the preferred solution for high-standard environmental protection and ultra-low emission dust removal projects.

The core working principle relies on the composite structure of base felt and PTFE membrane.The base felt provides strong mechanical support,tensile resistance and fatigue resistance to adapt to long-term negative pressure operation and frequent pulse jet impact.The ultra-thin PTFE membrane covers the entire filter surface with dense and consistent micropores,realizing true surface filtration.All fine particles,floating dust and sticky powder are intercepted on the membrane surface instead of penetrating into the fiber layer.During pulse cleaning,the super-smooth non-stick membrane allows dust cake to peel off completely without residue,effectively preventing bag blinding,dust embedding and continuous rise of system pressure difference.It maintains stable air volume and long-term efficient filtration throughout the service cycle.

PTFE coated filter bags feature diversified composite base materials to cover multiple working condition ranges.Polyester base PTFE coated bags apply to normal-temperature ultra-low emission scenarios below 130°C,suitable for building materials,grain processing and general industrial fine dust treatment.PPS base composite versions adapt to medium-temperature sulfur-containing flue gas up to 190°C,widely used in boiler flue gas and waste incineration dust removal.P84 or pure PTFE base membrane-coated bags support high-temperature and strong corrosive environments,meeting rigorous chemical and metallurgical flue gas purification standards.All products adopt advanced hot-melt composite technology without adhesive penetration,ensuring unobstructed air permeability and stable membrane adhesion without peeling off.

Compared with conventional ordinary filter bags,PTFE coated filter bags have unparalleled comprehensive advantages.The surface filtration mode completely avoids deep fiber dust embedding,keeping system operating resistance low and stable for a long time.The super non-stick property ensures thorough ash cleaning,solving caking and blockage problems caused by humid,viscous and hygroscopic dust.The microporous membrane accurately intercepts PM2.5 fine dust,enabling exhaust emission concentration far below standard limits and realizing ultra-low emission effect.In addition,PTFE material features excellent acid and alkali resistance,aging resistance and oxidation resistance,greatly extending filter bag service life and reducing long-term replacement and maintenance costs.

In practical industrial operation,PTFE membrane-coated filter bags deliver stable and low-maintenance performance.The integrated composite process ensures firm bonding between membrane and base felt,avoiding membrane shedding and failure under long-term pulse impact and temperature alternation.The smooth surface is not easy to absorb moisture and dust,effectively resisting dew point condensation blockage in high-humidity flue gas.Reinforced bag mouth snap band and high-strength sealing sewing prevent air leakage and dust bypass.Perfect dimensional matching with filter bag cages eliminates friction wear,supporting 24-hour continuous stable operation of high-standard dust removal systems.

Widely applicable in ultra-low emission renovation of cement plants,thermal power boiler flue gas purification,waste incineration dust removal,chemical fine powder filtration,metallurgical corrosive flue gas treatment and pharmaceutical industrial dust control projects,PTFE Coated Filter Bag is a high-end and high-reliability filtration solution.With precise surface filtration,thorough ash cleaning performance and excellent chemical stability,it provides long-term stable guarantee for energy-saving,efficient and environmentally friendly industrial dust removal systems.