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PTFE Polyester Needle Felt Filter Bags
PTFE Polyester Needle felt Filter Bags are popular for their excellent air permeability, smooth surface, and low resistance. Made from needle-punched non-woven fabric and laminated with PTFE film, they provide high-efficiency filtration and durability, with a temperature resistance of up to 150°C. These filter bags are cost-effective and ideal for industries requiring reliable dust collection and filtration performance.
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Product Description
Industrial Dust Collection Filter Media
PTFE Polyester Needle Felt Filter Bags
PTFE Polyester Needle Felt Filter Bags combine polyester needle felt with a PTFE membrane to deliver high filtration efficiency, low pressure drop, and long service life. The PTFE membrane provides true surface filtration, preventing dust from penetrating into the filter media while improving dust release during pulse cleaning.
Compared with standard polyester filter bags, PTFE Polyester Needle Felt Filter Bags offer higher air permeability, smoother surfaces, lower operating resistance, and more stable filtration performance. They are widely used in dust collection systems for cement, steel, power plants, chemical processing, and other industrial applications. For related media options, see filter bags.
Key Features
PTFE Membrane Surface Filtration
PTFE membrane provides true surface filtration, preventing dust from penetrating into the felt and improving dust cake release.
High Efficiency, Low Emissions
Fine dust is captured on the membrane surface, maintaining high collection efficiency and low emission levels from startup.
Low Pressure Drop
Smooth surface and stable airflow help reduce operating resistance and energy consumption.
Long Service Life
High mechanical strength, excellent wear resistance, and reduced cleaning stress extend filter bag service life.
Excellent Dust Cake Release
Non-stick PTFE surface allows dust to release quickly during pulse cleaning, keeping pressure loss stable.
Stable Continuous Operation
Resistant to folding and deformation, with stable performance under continuous industrial operation.
Recommended continuous operating temperature: 130–150°C. Maximum instantaneous temperature: 150°C.
Filter Bag Selection
Selecting the right PTFE Polyester Needle Felt Filter Bags depends on filtration efficiency, airflow, and operating conditions.
Fiber density directly affects air permeability and dust collection performance. We offer different needle felt weights, including 500 g/m², 550 g/m², 600 g/m², and 700 g/m², depending on your application.
With a PTFE membrane, filtration occurs directly on the membrane surface rather than inside the felt, allowing high efficiency without sacrificing airflow. For non-laminated bags, finer fibers are recommended to improve filtration precision.
Our engineering team can customize fiber density, felt weight, and membrane specifications to meet different dust characteristics and operating environments.
Advantages of PTFE Polyester Needle Felt Filter Bags
High Filtration Efficiency
Unlike conventional depth filtration, PTFE Polyester Needle Felt Filter Bags use surface filtration. The PTFE membrane captures fine dust immediately, reducing emissions and maintaining high collection efficiency from startup.
Long Service Life
The durable polyester base combined with a PTFE membrane provides excellent abrasion resistance and stable mechanical strength. Lower cleaning stress helps extend filter bag service life and reduce replacement costs.
Low Pressure Drop
The smooth PTFE surface minimizes dust penetration and prevents media blockage. As a result, PTFE Polyester Needle Felt Filter Bags maintain low operating resistance, high airflow, and lower energy consumption throughout their service life.
Easy Pulse Cleaning
The non-stick PTFE membrane allows dust cake to release quickly during pulse cleaning. Less residual dust means more stable pressure loss, improved cleaning efficiency, and longer operating cycles.
Applications
PTFE Polyester Needle Felt Filter Bags are suitable for a wide range of industrial dust collection systems, including:
- Cement plants
- Steel mills
- Power plants
- Chemical processing
- Mining
- Metal processing
- Building materials
- Industrial boilers
We also provide customized sizes, finishes, and PTFE membrane laminations to match your dust collector design and operating conditions. To discuss your application, please contact our engineering team.
Product Parameters
| Property | 400 g/m² | 450 g/m² | 500 g/m² | 550 g/m² | 600 g/m² | |
|---|---|---|---|---|---|---|
| Name | Polyester needle felt filter material | |||||
| Material | Polyester / polyester filament fabric | |||||
| Gram weight (g/m²) | 400 | 450 | 500 | 550 | 600 | |
| Thickness (mm) | 1.4 | 1.55 | 1.75 | 1.95 | 2.15 | |
| Air permeability (m³/m²/min) | 21 | 18 | 16 | 13 | 12 | |
| Tensile strength (N/5×20cm) | Warp | >1000 | >1000 | >1100 | >1100 | >1150 |
| Weft | >1250 | >1300 | >1400 | >1500 | >1500 | |
| Elongation (%) | Warp | <25 | <25 | <25 | <25 | <25 |
| Weft | <45 | <45 | <45 | <45 | <45 | |
| Bursting strength (N/m²) | 400 | 450 | 500 | 550 | 600 | |
| Continuous operating temperature (°C) | ≤130 | ≤130 | ≤130 | ≤130 | ≤130 | |
| Instant operating temperature (°C) | 150 | 150 | 150 | 150 | 150 | |
| Acid resistance | Good | |||||
| Alkali resistance | Medium | |||||
| Wear resistance | Excellent | |||||
| Hydrolytic stability | Medium | |||||
| Post-processing method | Singeing, calendering, heat setting (mirror treatment) | |||||
Customization and Engineering Support
We provide customized sizes, finishes, and PTFE membrane laminations for different dust collector designs and operating conditions. If you need help selecting the right filter bag, please Request Selection Support
Hot Tags: PTFE Polyester Needle Felt Filter Bags, PTFE polyester filter bag, needle felt China supplier, high-temperature filtration
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