Due to their smooth surface, high abrasion resistance, and excellent dust stripping (cleaning) efficiency, Singed Polyester Needle Felt Filter Bags are widely utilized in various industrial dust collection systems. They are particularly suitable for environments with high dust concentrations, abrasive particles, and elevated temperatures.
Filmedia® possesses advanced nonwoven needle-punched felt production machinery, capable of producing various needle-punched felt filter cloths.
Precision: 1um, 5um, 10um, 25um, 50um, 75um, 100um, 150um, 200um.
Description
What is Singeing?
Singeing is a process that involves rapidly burning away the tiny fibers on the surface of needle-punched felt at high temperatures, resulting in a smoother, more even fabric surface. This process is primarily used on polyester needle-punched felt filter media, improving the material’s surface properties without affecting its overall thickness and structure.
Advantages of Singeing Process
- Improved Filtration Efficiency
Reduced surface fuzz prevents dust from embedding deep within the fibers, thus improving dust separation efficiency.
- Enhanced Abrasion Resistance
Improved surface smoothness reduces particle abrasion on the fiber surface, extending filter bag life.
- Improved Airflow Performance
Reduced flow resistance decreases gas permeation resistance, helping to maintain the energy efficiency of the fan and system.
- Easy Dust Removal
The smooth surface allows for more thorough pulse or vibration cleaning, reducing secondary dust generation.
- Increased Surface Strength
Singeed fiber ends are fixed, reducing fuzzing and pilling.
Polyester Needle Felt Technical Data Sheet
| Property / Parameter | Unit | Value / Range | Description / Remarks |
| Base Material | – | Polyester Needle Felt | (High-tenacity filament scrim) |
| Finishing Treatment | – | Singed | (High-speed flame singeing) |
| Weight | $g/m^2$ | 400 – 800 | (Customizable) |
| Thickness | $mm$ | 2.5 – 6.0 | (Customizable) |
| Tensile Strength (W/F) | $N/5cm$ | ≥ 800 / ≥ 700 | (Warp / Weft direction) |
| Air Permeability | $m^3/m^2 \cdot min$ | 1000 – 2500 | (Depending on weight & thickness) |
| Max. Operating Temp. | $^\circ C$ | 160 – 180 | (Short-term peak / Surge) |
| pH Range | – | 6 – 8 | (Neutral) |
| Surface Finish | – | Singed | (Flat, smooth, reduced hairiness) |
Application Scenarios
Cement Industry
- High-dust zones such as preheaters, rotary kilns, and grinding mills.
- The singed surface minimizes dust embedding, significantly improving filtration efficiency and service life.
Metallurgical Industry
- Dust collection systems for iron and steel works, electric arc furnaces (EAF), and coking plants.
- Superior abrasion resistance handles the high-friction environment of metal dust.
Power Industry
- Boiler dust collection in coal-fired power plants.
- The singed treatment ensures high air permeability, reducing the energy consumption of induction fans.
Chemical & Pharmaceutical Industries
- Collection of chemical raw materials, activated carbon dust, and ultra-fine powders.
- The smooth surface facilitates easy cake release and prevents secondary dust dispersion.
Mining & Raw Material Processing
- Efficient collection of mineral ore, lime, and pulverized coal.
- Enhances system stability and extends the filter bag replacement cycle.
Other Industries
- Food processing dust, ceramic dust, etc.
- Singed polyester felt offers good chemical resistance, suitable for mildly corrosive environments.
