PTFE Membrane Filter Bag
What is a PTFE Membrane Filter Bag?
Unlike conventional depth-loading filters that clog over time, a PTFE Membrane Filter Bag utilizes a microscopic, porous ePTFE membrane laminated onto a high-performance substrate. This advanced “Surface Filtration” technology ensures that 99.99% of particles are captured at the very surface, preventing “blinding” and ensuring that every gram of your high-value powder is recovered.
- Surface-Level Precision: Captures sub-micron dust (like LFP or chemical powders) before it enters the fabric fibers.
- Easy Dust Cake Release: The low friction coefficient of PTFE allows dust to slide off instantly during pulse cleaning.
- Extended Service Life: Maintains low and stable pressure drop, drastically reducing energy costs and downtime.
Comparison Table
| Comparison Feature | Traditional Filter Bag (Depth Filtration) | PTFE Membrane Filter Bag (Surface Filtration) |
|---|---|---|
| Filtration Logic | Dust penetrates into the felt fibers. | Dust is blocked on the membrane surface. |
| Initial Emission | 30 - 50 mg/Nm³(Needs dust cake build-up) | < 5 mg/Nm³ (Instant high efficiency) |
| Pressure Drop | Rapidly increases as dust gets trapped inside. | Remains low and stable due to easy cleaning. |
| Cleaning Frequency | High (Short pulses to dislodge deep dust). | Low (Gentle pulses easily release surface cake). |
| Moisture Resistance | Poor (Prone to "blinding" or "plugging"). | Excellent (Hydrophobic, non-stick surface). |
Stop replacing bags every year. Switch to high-efficiency surface filtration.
Strategic PTFE Membrane Parameters Across Diverse Substrates
| Base Fabric (Substrate) | Max Operating Temp | Kimyasal Direnç | Best Application for Powder Recovery |
|---|---|---|---|
| Polyester (PE) | 130°C / 266°F | Adil | Standard industrial powders & generic dust |
| PPS | 190°C / 374°F | Excellent (Acid/Alkali) | LFP recovery with high moisture or sulfur |
| Aramid (Nomex) | 204°C / 400°F | İyi | Calcination & high-heat cathode processes |
| Fiberglas | 260°C / 500°F | Mükemmel | Extreme thermal recovery & kiln exhaust |
| PTFE Keçe | 260°C / 500°F | Ultimate (Universal) | Highly corrosive chemical or pharmaceutical lines |
Aokai PTFE Membrane : Achieving Ultra-Low Emissions
As global environmental regulations tighten, “standard” filtration is no longer enough. Aokai’s PTFE membrane is engineered specifically to meet and exceed the most stringent Ultra-Low Emission (ULE) requirements.
Non-Membrane
Aokai Exclusive Imported PTFE Membrane: Uniform pore distribution and high permeability
The Aokai PTFE Membrane: Engineered for Perfection
High-Density Micro-Pore Structure
- Aokai Technology: Our proprietary bi-axial stretching process creates a high-density web with billions of sub-micron pores.
- Customer Value: This ensures the highest air-to-cloth ratio while maintaining a rock-solid barrier against the finest dust .
Superior Thermal Bonding Strength
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Aokai Technology: Using advanced high-temperature lamination, our membrane is fused—not just glued—to the base fabric (Polyester, PPS, Aramid, or PTFE).
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Customer Value: Zero risk of delamination or peeling, even under high-pressure pulse-jet cleaning and thermal shocks.
Enhanced Hydrophobic & Oleophobic Surface
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Aokai Technology: The membrane surface is treated for ultra-low surface energy, giving it natural “non-stick” properties.
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Customer Value: Excellent “dust cake” release. Even with oily or moisture-heavy flue gas, the bags won’t “blind” or clog, ensuring stable pressure drop.
Optimized Air Permeability
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Aokai Technology: We achieve an optimal balance between pore size and porosity.
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Customer Value: Significant reduction in fan power consumption, leading to lower operational electricity costs for your plant.
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Frequently Asked Questions (FAQ)
Q1: What is the typical service life of Aokai PTFE membrane filter bags?
A: Depending on the specific working conditions (temperature, dust chemistry, and cleaning frequency), our PTFE-on-PTFE bags typically last 24 to 48 months. This is often 2-3 times longer than non-membrane filter media.
Q2: Can Aokai bags really guarantee emissions below 5mg/Nm³?
A: Yes. By utilizing our proprietary high-density ePTFE membrane, we achieve surface filtration that captures 99.99% of fine particles (PM 2.5). When properly installed in a well-maintained baghouse, stable emissions of <5mg/Nm³ are standard.
Q3: Is the membrane prone to peeling or delamination over time?
A: No. Unlike cheaper alternatives that use simple adhesives, Aokai uses a high-temperature thermal bonding process. This creates a permanent fusion between the membrane and the substrate (PPS, Aramid, or PTFE), ensuring it stays intact even after thousands of pulse-jet cycles.