PTFE (Polytetrafluoroethylene) filter bags are made from 100% pure PTFE fibers or PTFE membrane laminates, representing the most chemically stable and thermally resistant high-end filtration material available today. Their unique molecular structure provides near-universal chemical resistance and exceptional stability under extreme temperatures, making them the premier filtration solution for demanding applications in chemical processing, power generation, waste incineration, and other harsh industrial environments.
Key Advantages
✔ Unrivaled Chemical Resistance
Resistant to strong acids (e.g., concentrated sulfuric acid, hydrochloric acid), alkalis (e.g., sodium hydroxide), organic solvents, and oxidizers
Effective across the full pH range (0–14), making it the ultimate choice for corrosive gas/liquid filtration
✔ Exceptional Temperature Resistance
Continuous operation at 260°C (500°F), with short-term exposure up to 300°C (572°F)
Maintains flexibility at cryogenic temperatures down to -200°C (-328°F) without embrittlement
✔ Superior Filtration Performance
PTFE membrane surface filtration achieves initial efficiency >99.99%
Adjustable pore size (0.1–5μm) for capturing ultrafine particles like PM2.5
✔ Self-Cleaning Properties
Extremely low surface energy prevents dust adhesion
Reduces pulse-jet cleaning pressure by 30%+ compared to conventional filter media
Typical Applications
▌ Extreme Environments
- Chemical Industry: Collection of highly corrosive dust in titanium dioxide production and pesticide synthesis
- Waste Incineration: Filtration of dioxins and heavy metal vapors
- Electronics: Ultra-pure gas filtration in semiconductor manufacturing
▌ High-Temperature Processes
Cement kiln inlet/outlet gas (250°C+/482°F+)
Steel plant sinter machine exhaust
▌ High-Value Recovery
Precious metal catalyst recovery
Lithium battery material dust collection
Technical Comparison
Property | PTFE Filter Bag | PPS Filter Bag | Fiberglass Bag |
Max. Continuous Temp. | 260°C (500°F) | 190°C (374°F) | 280°C (536°F) |
Chemical Resistance | 0-14 pH | 1-12 pH | 1-9 pH |
Service Life | 3-5 years | 2-3 years | 1-2 years |
Initial Efficiency | >99.99% | 99.5% | 99% |
Customization Options
Construction Types:
- 100% PTFE needle felt (best temperature resistance)
- PTFE substrate + PTFE membrane (highest filtration precision)
- PTFE/fiberglass composite (cost-effective solution)
Surface Treatments:
▶ Conductive coating (for anti-static requirements)
▶ Oleophobic/hydrophobic treatment (for oily mist conditions)
Usage Guidelines
⚠ Installation Requirements
Must use specialized installation tools to prevent mechanical damage
Recommend PTFE sewing thread to prevent high-temperature seam failure
⚠ Operation & Maintenance
Pulse-jet cleaning pressure ≤0.5MPa (72.5 psi)
Avoid contact with sharp metal edges
⚠ End-of-Life Indicators
Sustained differential pressure >2500Pa (10″ H₂O)
Visible membrane layer detachment
Our Competitive Edge
- Uses raw materials equivalent to GORE® standards
- 100% SEM (Scanning Electron Microscope) quality inspection
- Provides end-to-end services: application analysis → product selection → installation → maintenance
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