Polyester Filter Bags Solutions for Dust Collection Systems
Polyester needle felt filter bags are made of needle punched many times and properly rolled. The short fibers are laid into a fiber web, and then the fiber web is reinforced into a cloth by needles with barbs, and the fiber web is repeatedly punctured to reinforce the fibers to form a needle-punched non-woven fabric. Non-woven fabrics have no distinction between warp and weft, the fibers are messy, and there is little difference in radial and weft properties.
Polyester filter bags are most common materials in the filter bag family. Polyester is a low-cost, widely available standard fiber used across manyindustries for industrial air filtration. It offers excellent tensile strengthand oxidation resistance with good mechanical stability.
Learn About Polyester Needle Felt
Technical specifications of polyester filter bags
| Item | Specification |
|---|---|
| Fiber Composition | 100% Polyester (PET) |
| Scrim Type | Polyester woven base fabric |
| Weight | 450–550 g/m² (customizable) |
| Thickness | 1.6–2.2 mm |
| Air Permeability | 80–150 L/m²/s |
| Continuous Temperature | 130°C |
| Peak Temperature | 150°C (short-term) |
| Tensile Strength (Warp) | ≥ 1000 N/5cm |
| Tensile Strength (Weft) | ≥ 1200 N/5cm |
| Finish Treatment | Singed, Calendered, PTFE Membrane, Water & Oil Repellent, Anti-static |
| Acid Resistance | Good |
| Alkali Resistance | Moderate |
| Oxidation Resistance | Good |
| Hydrolysis Resistance | Limited |
*Note: Polyester is ideal for dry-condition dust collectors, but sensitive to moisture/steam at high temperatures.
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).
Proven in Diverse Industries
In dry conditions without acidic gases, polyester filter bags deliver stable performance, helping you reduce energy consumption, extend equipment lifespan, and easily meet environmental requirements.
Our Manufacturing Strength
Aokai Environtec is a leading manufacturer of baghouse filter cloth, filter bags, and baghouse accessories. Founded in 2004 and headquartered in China, our products are used in a variety of applications and industries, including asphalt mixing plants, cement plants, mining operations, power generation plants, metallurgy industry, renewable energy industry, waste incineration plants, and other industrial facilities. Our mission is to make the world a cleaner and better place by protecting people, the planet, and production from the harmful effects of industrial processes.
Years of Experience
㎡ – 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)
1,000,000 ㎡
Smart Warehousing
Our Manufacturing Process
From Fiber to Filter: Full Control of Quality
Raw Material Selection
Mixing and Pretreatment
Intelligent Spinning & Web Formation
Precision Needle Punching Molding
Heat Setting
Singeing Treatment
Membrane Lamination
water/oil repellency
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.
HELP & SUPPORT
Polyester Filter Bags FAQ
Polyester filter bags are widely used in industrial baghouse dust collectors for dry dust collection. They are suitable for applications such as cement, mining, steel, wood processing, food processing, chemicals, and general industrial dust control.
Standard polyester filter bags are generally suitable for continuous operating temperatures up to 130°C. Short-term temperature peaks may reach around 150°C, depending on the filter media construction and operating conditions.
Standard polyester filter bags are not recommended for long-term high-temperature and high-humidity conditions. Moisture, condensation, or hydrolysis may reduce filter bag life. Water and oil repellent treatment can improve resistance to moisture and sticky dust.
Yes. Polyester filter bags can be customized with PTFE membrane lamination, water and oil repellent treatment, anti-static treatment, singeing, calendering, or PTFE impregnation according to the dust characteristics and emission requirements.
Yes. Polyester filter bags can be customized in diameter, length, top design, bottom design, snap band, cuff, reinforcement ring, sewing thread, and surface treatment. Samples or drawings can help ensure accurate production.
To recommend a suitable polyester filter bag, we usually need the operating temperature, dust type, moisture level, dust concentration, cleaning method, bag size, quantity, and any existing sample or drawing..
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