Nomex filter bags, also known as aramid filter bags, are known for their excellent thermal resistance, mechanical strength and chemical stability. They are commonly used in industrial applications where high temperatures and abrasive dust are present. These properties make them suitable for a variety of demanding industrial applications. Because of their resistance to high temperatures and chemicals, Nomex filter bags last longer than other filter media.
- High temperature resistant.
- Resists flexing and abrasion.
- Effect of moisture.
- Chemical resistance.
- Dimensional stability.
- Flame resistance.
Description
Filmedia® – Nomex Filter Bag Manufacturer
Filmedia® provides customized Nomex filter bag solutions based on the specific operating conditions of each customer. Through continuous process innovation, we achieve ongoing breakthroughs in filter bag performance, ensuring excellent reliability even under demanding environments.
Properties of Nomex Filter Bags
- Heat Resistance
Nomex filter bags can withstand continuous operating temperatures up to 200°C (392°F) and short-term peaks up to 250°C (482°F).
- Chemical Resistance
They offer good resistance to acids and alkalis, making them suitable for use in environments with harsh chemicals.
- Mechanical Strength
Nomex fibers provide excellent mechanical strength, ensuring durability and a longer service life.
- Abrasion Resistance
The inherent abrasion resistance of Nomex fibers helps the bags withstand the rigors of dust collection processes.
Specifications
|
Weight (g/m2)
|
450
|
500
|
550
|
|
Thickness (mm)
|
2.0
|
2.2
|
2.4
|
|
Air permenability
(m3/m2/min)
|
21
|
17
|
14
|
|
Tensile strength/ warp
|
> 800
|
> 800
|
> 800
|
|
Tensile strength/ weft
|
> 1100
|
> 1200
|
> 1300
|
|
Tensile elongation/ warp
|
< 35
|
< 35
|
< 35
|
|
Tensile elongation/ weft
|
< 55
|
< 55
|
< 55
|
|
Broke strength (Mpa/min)
|
2.55
|
2.40
|
2.35
|
|
Working temperature (℃)
|
≤ 204
|
≤ 204
|
≤ 204
|
|
Peak temperature (℃)
|
250
|
250
|
250
|
Chemical Properties
| Acid Resistance | Alkali Resistance | Hydrolytic Resistance | Oxidation Resistance | Abrasion Resistance |
| Good | Good | Good | Moderate | Excellent |
Technical Advantages in Manufacturing Nomex Filter Bags in Filmedia®
- The base fabric of the aramid needle felt filter bag is made of high-quality, high-strength aramid long fibers to ensure that the filter bag has sufficient mechanical strength. It is pretreated and heat-set to form an aramid base fabric with stable size and performance.
- The manufacturing process for Nomex filter bags involves a series of carefully controlled steps to ensure the final product meets the stringent requirements for industrial filtration applications. From the production of Nomex fibers to the cutting, sewing, and finishing of the filter bags, each step is designed to produce durable, high-performance filter bags capable of withstanding high temperatures and harsh chemical environments.
Processing Detail of Nomex Filter Bags
- Seam Design
Double-stitched seams using high-temperature resistant threads.
- Top and Bottom Configurations
Available in various designs, including snap band, ring top, and flange top for easy installation and secure fitting.
- Support Rings
Integrated support rings or other reinforcement structures to maintain bag shape and ensure optimal airflow.
- Ground Wire
Optional grounding wire to prevent static build-up in certain applications.
- Finish Treatment
Singeing, Calendering, Heat Setting, Anti-static, Water&Oil Repellent, PTFE Membrane, PTFE Impregnation and so on special treatment can be chosen.
Application of Nomex Filter Bags
- Cement Kilns and Clinker Coolers
Handling high-temperature and abrasive dust.
- Steel Plants
Used in electric arc furnaces and other high-temperature applications.
- Power Plants
Effective in fly ash collection and flue gas desulfurization units.
- Asphalt Production
Suitable for hot mix asphalt production dust collection.
- Chemical Processing
Employed in environments with corrosive chemicals and high temperatures.
Customized Solutions
For various industrial applications—such as high-temperature flue gas, corrosive atmospheres, or high dust-load conditions—Filmedia® conducts systematic optimization from fiber selection and blending to needle-punching processes. Combined with advanced finishing treatments (such as singeing, calendaring, heat setting, PTFE membrane lamination, and water & oil repellent treatment), the filter bags deliver enhanced filtration efficiency, improved dust release performance, and extended service life.
In addition, Filmedia® offers flexible customization of dimensions, shapes, and structures (including round bags, flat bags, and special-shaped bags) to ensure optimal compatibility with different dust collection systems, reducing airflow resistance and improving overall system stability and energy efficiency.
