Product Description
Polyester filter bags are the most common type of industrial filter bags, made from needle-punched nonwoven fabric. Short fibers are laid into a web, reinforced with barbed needles, and repeatedly needle-punched to form a dense, smooth, and highly breathable structure. The permeability of polyester filter bags is over 50% higher than conventional calendered fabrics, offering low resistance and high-efficiency filtration for industrial dust collection systems.
Working Principle
Polyester filter bags utilize depth filtration technology. Initially, some dust may pass through the filter media. As a dust cake forms, filtration efficiency improves significantly. Over time, dust penetrates the media, increasing differential pressure until the filter bag requires replacement.
Features of PET Needle-Punched Nonwoven Fabric
- High Filtration Efficiency: Captures fine dust and particulate matter effectively.
- Durability and Strength: Tear-resistant and wear-resistant, extending service life.
- Chemical and Solvent Resistance: Suitable for various acidic, alkaline, and solvent environments.
- Thermal Stability: Effective operation up to approximately 130°C (266℉).
- Moisture Resistance & Cleanability: Performs well in humid conditions and can be washed and reused multiple times.
Our technical support
- Increases system filtration capacity by 50–150% without major modifications to the dust collector.
- Optimized bag spacing significantly improves cleaning efficiency.
- Reduces fatigue damage from bag-cage collisions, extending filter bag life.
Post-Treatment & Customization
Depending on operating conditions, the following post-treatments are available:
- Anti-static (linear, cross, hybrid types)
- Spark-resistant
- Water & oil repellent
- Abrasion-resistant (acrylic coating)
- PTFE membrane
- PTFE impregnation
Applications
Polyester filter bags are widely used in industrial settings, including:
- Cement and asphalt production
- Water treatment
- Chemical processing
- Food and beverage
- Air filtration and purification
- Pharmaceutical production
- Tailings management
- Agricultural processing
- Paints and coatings
- Mixing and blending
Product Specifications
| Product Name | Polyester Filter Media | Polyester Membrane Filter Media | |
|---|---|---|---|
| Fiber | High-Strength Polyester | ||
| Base Cloth | Polyester Filament | ||
| Gram Weight (g/m²) | 550 | ||
| Continuous Operating Temp. (℃) | 120 | ||
| Instant Operating Temp. (℃) | 150 | ||
| Tensile Strength (N/5*20cm) | Warp | ＞1000 | |
| Weft | ＞1800 | ||
| Elongation at Break (%) | Warp | ＜30 | |
| Weft | ＜50 | ||
| Air Permeability (m³/m²·min) | 10~15 | 2~5 | |
| Air Velocity (m/min) | ＜1.2 | ||
| Application Scenarios | High strength and good wear resistance. Suitable for steel, cement and other industries. | High strength and good wear resistance. Suitable for steel, cement and other industries. | |
| Physical Properties | ||||
|---|---|---|---|---|
| Air Permeability (L/m².s) @200pa |
Tensile Strength (N/5cm) Warp |
Tensile Strength (N/5cm) Weft |
Continuous Temp. (℃/℉) |
Instant Temp. (℃/℉) |
| 200~300 | 1300 | 1500 | 130/266 | 150/302 |
| Chemical Properties | ||||
| Acid Resistance | Alkali Resistance | Hydrolytic Resistance | Oxidation Resistance | Abrasion Resistance |
| Moderate | Moderate | Poor | Good | Excellent |
Detailed Photos
