Polyester (PE/PET) Filter Bag
Our premium filter bag polyester (polyester needle felt) is the most versatile and cost-effective choice for industrial dust control systems.Our Polyester (PE/PET) Needle Felt Filter Bags are manufactured using premium-grade 100% polyester fiber through advanced needle punching technology, combined with high-frequency hot-melt welding or reinforced stitching. Characterized by outstanding wear resistance, superb resistance to standard-temperature acids, and exceptional cost-effectiveness, it is the premier choice for industrial dust collection and air filtration systems.
Working Principle
The working principle of the polyester filter bag is the so-called “depth filtration” technology, that is, the “primary dust layer” (powder filter cake) is formed on the surface through the capture of the filter material fibers, and then the subsequent dust is filtered out through the powder filter cake. During the initial use of the polyester filter bag, due to its own large gap, some dust will be discharged through the filter material. Only when the powder cake is formed can the filtration process actually begin. After continuous use, the dust on the surface of the polyester filter bag will gradually penetrate into the filter material, causing the pores of the filter material to be blocked, increasing the running resistance of the equipment until the filter material must be replaced.
Teknik Özellikler
| Öğe | Şartname |
|---|---|
| Fiber Composition | 100% Polyester (PET) |
| Scrim Type | Polyester woven base fabric |
| Ağırlık | 450–550 g/m² (customizable) |
| Kalınlık | 1.6–2.2 mm |
| Hava Geçirgenliği | 80–150 L/m²/s |
| Sürekli Sıcaklık | 130°C |
| Zirve Sıcaklık | 150°C (short-term) |
| Tensile Strength (Warp) | ≥ 1000 N/5cm |
| Çekme Dayanımı (Atkı) | ≥ 1200 N/5cm |
| Finish Treatment | Singed, Calendered, PTFE Membrane, Water & Oil Repellent, Anti-static |
| Asit Direnci | İyi |
| Alkali Direnci | Orta düzeyde |
| Oksidasyon Direnci | İyi |
| Hidroliz Direnci | Limited |
Industrial Applications
Our filter bag polyester solutions are widely used in a variety of industries, including:
- Cement & Mining: Raw mill, crushing, bagging, and cement silo dust collection.
- Woodworking & Furniture: Sawdust and wood shaving extraction.
- Chemical & Plastics: Fine powder processing and conveying.
- Metals & Metallurgy: Shot blasting, grinding, and foundries (low-temperature zones).
Common Classifications of Polyester Filter Bags
Polyester (PET) filter bags are the most widely used dust collector bags in industrial filtration. To adapt to different working conditions, they are classified into several functional types:
Standard Polyester Filter Bag
Features: Excellent tensile strength, high abrasion resistance, and highly cost-effective.
Application: Best for general, dry, and non-corrosive dust collection under normal temperatures (up to 130°C).
Anti-static Polyester Filter Bag
Features: Blended with conductive fibers (such as stainless steel fibers or conductive yarns) to safely discharge electrostatic buildup.
Application: Essential for combustible or explosive dusts, such as coal dust, flour, and chemical powders.
PTFE Membrane Polyester Filter Bag
Features: Laminated with a micro-porous PTFE membrane for surface filtration, achieving near-zero emissions and easy dust cake release.
Application: Perfect for ultra-fine dust (PM2.5) control and sticky dust that is hard to clean.
Water & Oil Repellent Polyester Filter Cloth
Features: Treated with fluorocarbon resins to resist moisture and oil, preventing the filter bag from clogging (blinding).
Application: Highly recommended for high-humidity, mist-heavy. (e.g., cement plants, steel mills).
What We Can Customize
1. Precise Dimensions
Length : From short 1-meter bags to ultra-long 8-meter+ bags.
Diameter: Custom diameters (e.g., 130mm, 150mm, 160mm) engineered to match your tubesheet hole seamlessly to prevent dust bypass.
2. Top & Bottom Configurations
Top Styles : Raw edge, flange top, cord ring, steel wire snap band, or rubber gaskets customized for your specific tubesheet design.
Bottom Styles : Reinforced double bottom, flat bottom, or disc bottom with extra wear strips to resist abrasion from high-velocity dust impacts.
3. Advanced Surface Treatments for Complex Gases
- PTFE Membrane E-PTFE : For ultra-fine dust collection and near-zero emissions (<5mg/m³).
- Water & Oil Repellent Ideal for moisture-heavy or oily flue gases, preventing blinding and moisture clogging.
- Antistatic / Carbon Line : Woven with conductive fibers to safely dissipate static charges in explosive dust environments (e.g., flour mills, coal dust).
- PTFE Dipping / Bath : Enhances chemical and acid-alkali resistance.