100% PTFE needle felt and membrane options for corrosive gases, high temperatures, humidity, and fine dust. Custom-made to fit your baghouse system.
PTFE filter bags are industrial dust collection bags made from polytetrafluoroethylene (PTFE) needle felt, with optional ePTFE membrane lamination.They are commonly used in baghouse systems handling corrosive gases, high humidity, elevated temperatures, and fine dust. Compared with standard filter media, PTFE filter bags offer strong chemical resistance and stable performance in demanding filtration conditions.
- Ultimate Chemical Resistance: 100% pure PTFE fiber, resistant to almost all acids, alkalis, and organic solvents, suitable for pH 0-14 range.
- Ultra-High Temperature Resistance: Continuous operating temperature 240°C, instantaneous up to 260°C, ideal for high-temperature flue gas.
- Surface Filtration Technology: Optional PTFE membrane lamination, dust does not penetrate inside, easy cleaning, low pressure drop, extended bag life.
- High Filtration Efficiency: Captures 0.1μm fine dust, emission <10mg/Nm³, meets strict environmental standards.
- Low Friction & Easy Cleaning: Self-lubricating surface, more efficient pulse jet cleaning, energy-saving and consumption-reducing.
Learn About PTFE Filter Cloth
New Energy Dedicated PTFE Filter Bags(PT180)
Without film coating PTFE filter bags
PTFE Filter Bag（PT175M）
Technical Specifications Table of PTFE Filter Bags
| ITEM | PT175 | PT175M | PT180 | PT180M | PT380 |
|---|---|---|---|---|---|
| Construction | 100% PTFE Felt | PTFE Felt + Membrane | 100% PTFE Felt | PTFE Felt + Membrane | Non-Membrane PTFE Media |
| Working temperature (°C) | 240 | 240 | 240 | 240 | 240 |
| Peak temperature (°C) | 260 | 260 | 260 | 260 | 260 |
| Emission (mg) | / | / | / | / | 10 |
| Weight (g/㎡) | 750±5% | 750±5% | 800±5% | 800±5% | 800±5% |
| Thickness (mm) | 1.5±10% | 1.0±10% | 1.6±10% | 1.2±10% | 1.6±10% |
| Air Permeability @ 200 Pa(m³/㎡/min) | 12±20% | 2-5 | 10±20% | 2-5 | 8±20% |
| Tensile strength /warp（N/5cm） | ≥800 | ≥800 | ≥800 | ≥800 | ≥800 |
| Tensile strength /weft（N/5cm） | ≥800 | ≥800 | ≥800 | ≥800 | ≥800 |
| Tensile elongation/warp（%） | ≤10 | ≤10 | ≤10 | ≤10 | ≤10 |
| Tensile elongation /weft（%） | ≤20 | ≤20 | ≤20 | ≤20 | ≤20 |
| 24-hour heat shrink / warp（%） | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 |
| 24-hour heat shrink /weft（%） | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 |
Post-treatment: Heat Setting / PTFE Dipping / PTFE Membrane
*PT175, PT175M, PT180,PT380 and PT180M are Aokai internal PTFE filter bag model codes. Each model is developed with different fiber blend ratios, scrim constructions, surface finishes, and optional membrane or functional treatments to suit different filtration conditions.
How to Select the Right PTFE Filter Bags Model
| Model | PTFE Membrane | Key Feature | Recommended Use |
|---|---|---|---|
| PT175 | No | Standard 750 g/m² PTFE felt with relatively higher air permeability | General high-temperature and corrosive gas filtration applications |
| PT175M | Yes | Low-permeability surface filtration structure for improved dust release | Fine dust, low-emission applications, and conditions requiring easier pulse-jet cleaning |
| PT180 | No | Heavier 800 g/m² PTFE felt construction | Applications requiring a more robust filter media structure |
| PT180M | Yes | Heavier PTFE felt with membrane surface filtration | Fine dust and demanding operating conditions requiring low permeability and improved dust release |
| PT380 | No | Project-specific PTFE configuration with lower air permeability than standard non-membrane options | Applications requiring customized media selection based on dust properties, air-to-cloth ratio, and cleaning conditions |
PTFE Membrane vs. Non-Membrane Filter Bags
PTFE Membrane-Laminated Filter Bags
PTFE membrane filter bags use a microporous ePTFE membrane laminated onto the surface of PTFE needle felt.
Filtration Type: Surface filtration
Dust Behavior: Dust is captured mainly on the membrane surface
Best For: Fine dust, difficult-to-release dust, and applications requiring efficient pulse cleaning
Key Benefit: Helps reduce dust penetration into the felt and supports easier dust release under suitable operating conditions
Non-Membrane PTFE Filter Bags
Non-membrane PTFE filter bags use PTFE needle felt without a laminated membrane surface.
Filtration Type: Depth filtration
Dust Behavior: Dust particles gradually enter and collect within the felt structure
Best For: General corrosive or high-temperature dust collection applications
Key Benefit: A practical option where membrane surface filtration is not required and the operating conditions are suitable for standard PTFE felt
Industry & Application
PTFE filter bags can provide excellent filtering effects in various harsh filtering environments. The application of this material not only improves the filtering efficiency, but also brings more possibilities to industrial production and promotes the progress and development of the industry.
Custom PTFE Dust Filter Bags Solutions for Every Industry
Tell us your working conditions, and we will recommend the best solution within 24 hours.
Free Sample (Quality Testing Available)
Fast Delivery 7–15 Days
Factory Direct Price
Our Manufacturing Strength
With over 21 years of experience, our production facility covers more than 27000 m² and is equipped with advanced filter media and bag-making equipment to ensure consistent quality and high efficiency.
Years of Serving Customers
㎡ – Modern Production Base
Customers Worldwide
exporting country
4,000,000 ㎡
Annual Filter Media Production
- Automatic Production Lines
- Oil & Water Repellency Treatment
- Heating Setting
- Singeing
- Calendering
- Lamination
3,000,000 pcs
Annual Filter Bag Production
- Automatic Multi-Task Production Lines
- Precision Sewing
- Heat Sealing
- Pinhole Sealing
- Seam Lamination
2,000,000 m
Annual Cage Production
- Filter Cages of All Shapes & Sizes
- Cage Treatments
- Silicone Coating
- Galvanizing
- Passivation (stainless steel)
Quality Control
Raw material quality control
The raw materials of Aokai have undergone tests for 13 indicators in the laboratory, including fiber composition, air permeability, breaking strength and elongation at break, thermal shrinkage, moisture regain, oil content, and fiber melting point, with all test standards surpassing the relevant criteria.
Production process quality control
The factory has obtained ISO9001 and ISO14001 certifications. It operates in accordance with the 7S management standards, strictly controls product quality in line with international high-end product testing standards, retains inspection records for more than 3 years and electronic records permanently, ensuring the traceability of each batch of products.
Filter Felt
Filter Bags
Autefa imported lines with dual-cylinder eight-zone carding
Filter Media Treatment
Advanced Needle-punch Lines
Phase II Filter Media Production Line
Automatic sewing & inspection lines
Filter Bags
HELP & SUPPORT
PTFE Filter Bags FAQ
100% PTFE filter bags are commonly considered for demanding baghouse applications involving corrosive gas components, high humidity, chemical exposure, fine dust, or elevated operating temperatures.
However, PTFE is not automatically the best choice for every system. Final filter media selection should be based on operating temperature, gas composition, oxygen content, moisture level, dust characteristics, cleaning method, and budget.
Non-membrane PTFE filter bags use PTFE needle felt and mainly rely on depth filtration, meaning dust gradually enters the felt structure during operation.
PTFE membrane-laminated filter bags include a microporous ePTFE membrane on the surface of the needle felt. This creates a surface-filtration structure, helping dust remain closer to the media surface and supporting easier dust release under suitable pulse-cleaning conditions.
Membrane-laminated PTFE filter bags are often considered for fine dust, difficult-to-release dust, or applications with stricter emission and cleaning-performance requirements.
Yes. PTFE filter bags can be considered for waste incineration, waste-to-energy, chemical processing, and other demanding applications involving corrosive gases, moisture, and temperature fluctuations.
Before selecting PTFE filter bags, it is important to confirm the actual gas temperature, oxygen content, acid gas concentration, moisture level, dust abrasiveness, cleaning method, and required service life.
For an accurate quotation and technical recommendation, please provide:
- Filter bag diameter and length
- Quantity required
- Existing filter bag photo, drawing, or sample
- Current filter media, if known
- Operating temperature and peak temperature
- Dust type and gas composition
- Cleaning method: pulse-jet, reverse-air, or shaker
- Bag top and bottom design
- Required delivery destination or port
If you do not have complete information, you can send us photos of your existing filter bags and dust collector system for review.
PTFE filter bag dimensions and construction should match your existing baghouse design, including the tube sheet hole size, filter cage dimensions, bag length, cleaning system, and installation method.
Common options include snap band tops, ring tops, cuff tops, disc bottoms, hemmed bottoms, reinforced wear strips, and customized seam construction.
For replacement bags, the fastest approach is to provide an existing bag sample, drawing, or clear photos with measurements.
PTFE is highly versatile, but other filter media may be more suitable depending on the operating conditions.
- PPS filter bags may be considered for suitable acidic or alkaline gas conditions where the temperature and oxygen level are within the recommended range.
- Aramid filter bags may be suitable for dry, medium-to-high-temperature dust collection applications with abrasion concerns.
- P84 filter bags may be considered for fine dust, irregular particle shapes, or applications requiring good dust-release performance.
- Fiberglass filter bags may be suitable for high-temperature, relatively dry flue-gas applications where a cost-effective solution is required.
Aokai can compare PTFE, PPS, aramid, P84, and fiberglass filter media based on your actual operating conditions and recommend a suitable solution.
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*All information will be kept confidential.
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