Aramid Filter Bags

Description of Aramid filter bags

Aramid filter bags are made of a synthetic fiber material called aramid, also known as Nomex. It was first developed in the 1960s and made commercially available in 1967 by DuPont. For filtration applications, it is most often known as Meta Aramid. As a filtration media, it has the following characteristics:

● Efficient Particle Retention —— The tightly felt structure of the aramid filter media enables it to effectively capture fine particles, thereby achieving high levels of filtration efficiency.

● High Temperature & Flame Resistance —— Aramid filter bags possess remarkable resistance to high temperatures without significant degradation. These aramid bags can withstand continuous operating temperatures of up to 204°C (400°F). In addition, aramid filter bags are self-extinguishing and flame retardant.

● Chemical Resistance —— Aramid filter bags are resistant to a wide range of chemicals, including acids, alkalis, and solvents.

● High Strength and Robustness —— Aramid fibers have exceptional tensile strength, which makes the filter bags resistant to tearing and bursting. They can withstand the rough handling and abrasive nature of certain dust particles, resulting in enhanced durability and reliability.

● Low Thermal Shrinkage —— When aramid filter bags are subjected to elevated temperatures, they demonstrate excellent stability and resistance to shrinkage. They maintain their original size and shape even after prolonged exposure to extreme heat.

In addition to these filtration characteristics, aramid filter bags also offer a number of other advantages, such as:

● Extended Filter Bag Service Life —— Aramid filter bags are known for their exceptional durability and longevity. The high-quality construction and chemical resistance nature allow for extended service life, reducing downtime, and minimizing maintenance costs.

● Enhanced Cleaning Efficiency —— Aramid filter bags have a smooth and non-stick surface that facilitates effective and efficient cleaning processes. This ensures efficient dust cake release, thorough bag cleaning, and prevents filter bag clogging.

● Lower Energy Consumption —— Because of its enhanced cleaning efficiency, it helps to reduce the overall pressure drop across the filter media, improving the efficiency and energy consumption of the dust collection system.

● Environmental Friendliness —— Aramid filter bags are eco-friendly and recyclable. They can be disposed of safely without causing harm to the environment.

Scrim-supported felt is used exclusively in the production of our aramid filter bags in order to improve filtration efficiency and extend the filter bag life. Aokai aramid filter bags are widely used in asphalt, cement, and mining & metallurgy industries.

Specification of Aramid Filter Bags

Post-treatment of Aramid Filter Bags

Aramid filter media can be constructed and treated with various options so that they become best suited for various operating conditions, applications, and industries.

● ePTFE Membrane

Adding an ePTFE membrane to an aramid filter bag allows the membrane to act as the filter cake. Dust stays on the surface of the membrane and does not get entrained into the fibers of the filter bag, which lengthens the life of your filter bag. It also reduces wear and tear, lower maintenance costs, and energy costs due to easy dust cake release during the cleaning cycle.

● PTFE Coating

The filter media is coated in a bath or spray of liquid PTFE resin. This is done to protect filter bags. The treatment improves the flex life, heat and chemical resistance, and dust release from the filter bags. This increases the service life and filtration efficiency. PTFE finish is commonly used in applications with corrosive chemical compounds, sticky dust, or high moisture contents.

● Hydro-Oleophobic Coating

This aids in filtration, adds resistance to water and oils, and improves cake release.

● Static Resistant

Helps to ground the filter bag to eliminate sparks that might cause combustion explosions.

● Singe

Singeing is a finishing process where the surface of the filter media is exposed to a flame or hot gas to burn off the fine and straggly fibers in order to provide a uniform and smooth surface area, which improves dusk cake release, enhanced filtration efficiency, and better air permeability.

The singeing process typically involves passing the fabric over an open flame or through a heated chamber. The heat singes off the protruding fibers without damaging the main structure of the fabric. The process parameters, such as speed and temperature, are carefully controlled to achieve the desired level of smoothness and finish.

● Glazing

Glazing, also known as calendering, is the high-pressure pressing of the fabric by rollers to flatten or smooth the surface. Glazing pushes the surface fibers down onto the body of the filter media to increase and uniform surface life, improve stability, reduce shrinkage, and improve dust cake release.

Application of Aramid Filter Bags

Aokai Environtec manufactures high-quality filter bags of virtually any style, configuration, and size for any make of dust collector. We use the in-house custom-designed and manufactured filter media and custom-make the filter bags to your precise specifications to best suit your specific industry, application, and operating conditions. We specialize in designing and manufacturing high-temperature filter media and filter bags. When you choose Aokai, you're choosing uncompromising quality and performance, woven into every stitch. Aokai's advantages include:

Custom-Design & Manufactured Filter Media

Aokai manufactures and stocks hundreds of filter media materials with a complete range of lamination and treatment options. Whether you need filter bags to withstand high temperatures or abrasive, corrosive, and explosive dust, we custom-design and manufacture filter media that best suit your operating conditions.

Experienced in All Major Industries

Aokai serves more than 10,000 customers worldwide in all major industries, such as asphalt mixing, cement, mining & metallurgy, power generation, renewable energy, woodworking, and many other demanding industries. Our engineering teams are experienced and well-trained to handle challenging issues in all major industries.

Custom Made to Precise Specs.

Aokai custom-makes filter bags to your precise specifications, such as dust collector styles, physical configurations, and sizes. We offer a variety of bag top and bottom attachment options ensuring a perfect fit for your equipment.

Expert Craftsmanship

Aokai's skilled technicians utilize cutting-edge sewing techniques and precise finishing touches, creating filter bags that are seamlessly durable and leak-proof. Our filter bags are truly engineered solutions, built to withstand demanding environments and deliver exceptional filtration performance, saving you time, money, and resources.

On-Time Delivery

To ensure on-time delivery, Aokai manufactures everything in-house, including filter media, filter bags, and filter cages. With a five million filter bag per annum capacity, we deliver on time.