Acrylic Filter Bags
Acrylic filter bags are industrial dust collector filter bags specifically designed for medium-temperature operating conditions with high humidity and moderate chemical corrosion. Compared with polyester filter bags, acrylic filter media provides superior hydrolysis resistance and improved resistance to acidic flue gas environments.
They are widely used in coal-fired boiler systems, industrial exhaust filtration, and dust collection applications where moisture resistance, stable filtration performance, and cost-effective operation are required.
Key Benefits: Excellent hydrolysis resistance, improved acid resistance, stable medium-temperature performance, good dimensional stability, and reliable filtration performance in humid operating environments.
Microscopic Filtration Mechanism
Three-Dimensional Needle Felt Structure
Acrylic fibers form a dense needle-punched network that creates multiple particulate capture pathways throughout the filter media.
Surface & Deep Filtration
Dust particles are captured both on the filter surface and within the fiber structure during initial operation.
Fine Dust Interception
Fiber spacing and irregular arrangement improve collection efficiency for medium and fine particulate matter.
Stable Dust Cake Formation
A porous dust layer gradually forms on the filter surface, enhancing filtration efficiency and cleaning stability.
Uniform Airflow Distribution
Balanced fiber distribution helps maintain stable operating resistance and consistent airflow performance.
Technical Specifications
| Item | Technical Data |
|---|---|
| Material | Acrylic Fiber Needle Felt |
| Weight | 500–550 g/m² |
| Thickness | 2.0–2.2 mm |
| Continuous Operating Temperature | 125°C–140°C |
| Instant Maximum Temperature | 150°C |
| Air Permeability | 10–15 m³/m²/min |
| Abrasion Resistance | Moderate |
| Acid Resistance | Good |
| Alkali Resistance | Moderate |
| Hydrolysis Resistance | Good |
| Oxidation Resistance | Moderate |
| Surface Treatment | Heat Setting / Calendaring / Membrane Lamination / Anti-Static / Water & Oil Repellent |
Main Advantages
Good Hydrolysis Resistance
More stable than polyester filter media in high humidity environments.
Better Acid Resistance
Suitable for flue gas containing moderate acidic compounds.
Stable Medium Temperature Performance
Provides reliable performance in continuous industrial filtration systems.
Good Dimensional Stability
Maintains stable bag structure during long-term operation.
Cost-Effective Solution
Lower cost than specialty high-temperature media while providing improved moisture resistance.
Good Filtration Stability
Suitable for continuous industrial dust collection applications.
Limitations & Considerations
- Limited high-temperature resistance above design limits
- Moderate abrasion resistance under severe abrasive dust conditions
- Limited alkali resistance in strong alkaline environments
- Moderate oxidation resistance under elevated oxygen concentrations
- Not suitable for severe corrosive gas environments
Common Surface Finishing Treatments
Heat Setting
Improves dimensional stability and reduces shrinkage.
Calendaring
Improves dust release performance and surface smoothness.
Membrane Lamination
Improves fine particulate filtration efficiency and lowers emissions.
Anti-Static Treatment
Reduces static electricity accumulation in combustible dust systems.
Water & Oil Repellent Treatment
Improves moisture resistance and reduces sticky dust adhesion.
Singeing
Removes loose fibers and improves surface smoothness.
Highly suitable for medium-temperature dust collection systems, high humidity environments, and coal combustion flue gas filtration. For strong acid gas conditions, PTFE filter media is generally recommended for longer service life and superior corrosion resistance.
