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.

ePTFE Membrane Lamination

We Craft Every Filter Bag with Care

We’re a dedicated manufacturer of dust collector filter bags and needle-punched felt fabrics. Every day in our workshop, we pour our heart into creating durable, high-efficiency filter bags – protecting cement, steel, power plants, and more from dust, safeguarding the environment, your equipment, and your team’s health.

Aramid Filter Bags

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.

Our meta-aramid filter bags are manufactured with 100% virgin aramid fiber and provide equivalent filtration performance and temperature resistance to globally known brands (such as Nomex®), but at 40-60% lower cost.

  • Operating Temperature: Continuous 204°C, peak up to 250°C
  • Resists flexing and abrasion.
  • Effect of moisture.
  • Chemical resistance.
  • Dimensional stability.
  • Flame resistance.
nomex fabric

Aramid Fiber Filter Bags

Aramid Fiber Filter Bags

Nomex Filter Bags

Aramid Filter Bag Dust Collection Characteristics

CharacteristicsRating
Fiber Content100% Virgin Aramid
Weight475g/m² (14oz/yd²)
Thickness1.91mm (0.075in)
Fabric ConstructionNeedlefelt
Continuous Operating Temperature204°C (400°F)
Maximum Surge Temperature250°C (482°F)
Abrasion ResistanceGood
Acid ResistanceGood
Alkali ResistanceGood
Moist Heat ResistantGood
Energy AbsorbsionGood
Filtration PropertyExcellent
Oxygen (15%+)Poor
三一 副本

Aramid/Nomex Filter Bags

徐工 副本

Anti-Static Aramid Filter Bags

日工 副本

PTFE Membrane Laminated Aramid Filter Bags

边宁荷夫 副本

Water & Oil Repellent Treated Aramid Filter Bags

Dust Collector Filter Bags

Flame Retardant Treated Aramid Filter Bags

安迈 副本

Combined Treatments

Application

Asphalt Plant Dust Collection

Asphalt Mixing Plants

Non-Ferrous Metals Plant Dust Collection

Steel & Metallurgy

Cement Plant Dust Collection

Chemical & Mining

waste incineration industry 2

Power Generation

waste incineration industry 3

Waste Incineration

Renewable Energy Industry Dust Collection

New energy sector

Cement Plant Dust Collection

Cement & Building Materials

pulp and paper industry

Pulp and Paper Industry

Lean Intelligent Manufacturing

We adopt high-performance fibers from world-renowned brands and conduct rigorous 13-item laboratory testing, including fiber composition, breaking strength, thermal shrinkage, and more.

Raw Material Selection

Raw fibers are precisely weighed and scattered by automatic equipment, then thoroughly opened and cross-blended in high-speed multi-chamber air mixing system. Fiber uniformity reaches over 98%, providing a stable foundation for high-quality needle felt production.

Mixing and Pretreatment

Equipped with German Autefa intelligent production lines, high-frequency high-speed needle punching machines, and imported Groz-Beckert needles, we achieve a high-speed web output of 100m/min through an 8-stage precision carding process.

Intelligent Spinning & Web Formation

Adopt multi-zone needle punching technology, combined with imported card clothing double cylinders. Precisely control punching depth and density to form a three-dimensional filtration structure.

Precision Needle Punching Molding

Stabilizes the fabric dimensions after processing, ensuring consistent fit, shrink resistance, and compatibility with bag cages.

Heat Setting

Singeing removes surface fuzz and loose fibers, preventing dust re-entrainment and improving cleaning efficiency. It creates a smooth surface ideal for pulse-jet cleaning systems.

Singeing Treatment

A PTFE or ePTFE microporous membrane is laminated onto the fabric surface to achieve ultra-fine filtration. It enables ≤5mg/m³ emission levels, reduces pressure drop, and significantly extends bag life.

Membrane Lamination

Chemical finishing forms a molecular film, repelling water/oil, retaining texture/breathability, wash & stain resistant.

water/oil repellency

Processing Detail of Filter Bags

High quality seam designed for lowest emissions

Sewn, welded, with additional PTFE seam seal.

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.

filter fabric

Filter bag sewing technology

Pinhole Sealing Technology

Pinhole Sealing Technology

Seamless Sewing Technology

Seamless Sewing Technology

TAP Lamination Technology

TAP Lamination Technology

Advanced automatic bag body sewing equipment enables computer-adjustable sewing seam positions and stitch densities, along with fabric deviation correction and automatic stop upon thread breakage. It is also equipped with advanced technologies such as auxiliary pinhole sealing and film lamination to meet the requirements of ultra-low emissions.

Related Products

We also provide various high-quality filter cages, filter bags, and other accessories to offer you a one-stop dust removal solution.

Custom Dust Filter Bag Solutions

No two plants are the same. That’s why we never offer off-the-shelf answers.
At Aokai, every filter bag is engineered specifically for your operating conditions: dust properties, gas temperature, chemical aggression, and emission targets.

Custom Dust Filter Bag Solutions

Fiber & Treatment: Choose PTFE, P84, Aramid, PPS, anti-static, PTFE membrane, or any blend
Construction: Triple-needle stitching, heat-sealed seams, ultrasonic welding – whatever delivers maximum durability
Fit & Design: Made to the exact millimeter, including special shapes, pleated bags, and integrated cage-bag designs

Cabture 1

PTFE Filter Bags

PRO650 coal fired

Glassfiber Filter Bags

涤纶混导电

Polyester Filter Bags

Custom Needle Felt Filter Media

Your dust, your conditions – your perfect felt.

Custom Needle Felt Filter Media

Fibers & scrim: Glass, P84, Aramid, PTFE, Meta-aramid – blended exactly as needed
Weight: 400–900 g/m², precisely controlled
Finishes: PTFE membrane, water/oil repellent, anti-static, flame retardant, hydrolysis-resistant – all available

PTFE fabric

PTFE fabric

Nomex dust filter cloth

Aramid Fabric

Antistatic Baghouse Filter Media

Polyester Filter Cloth

filter bag cage 3 1

Galvanized Steel Filter Bag Cages

骨架集合

Stainless Steel Filter Bag Cages

Envelop Filter Cage

Flat Filter Cage

filter bag cage for air dust collector 1

More>>

About  Aokai

Aokai Environtec is a leading manufacturer of baghouse filter cloth, filter bags,filter cage. 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.

1
Years of Serving Customers
1
㎡ – Modern Production Base
1
Customers Worldwide
1
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)

Warehouse & Stock

Intelligent Visualized Warehouse & Stock Strength
Global Shipping

Ship Worldwide in as Fast as 48 Hours

Massive Stock Power

500,000 m² Always Available

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.

Raw Material Inspection

Laboratory data analysis

Preliminary testing of filter cloth

Semi-finished product inspection

Finished product inspection

R&D Capability

We use the state-of-the-art testing equipment and devices for raw material inspection, media selection, full-process production inspection, and new product development.

Filter Media Testing & Analysis

Germany FilTEq FEMA 1-AT Dust Filtration Efficiency Testing System

Espec GPH-H20 High-Temperature Oven (Japan)

Japan Espec GPH-H20 High-Temperature Drying Oven

微信图片 20231227110123

USA PMI CFP-1100AX Pore Size Analyzer

FX3300-IV Air Permeability Tester (Switzerland)

Switzerland FX3300-IV Air Permeability Tester

Filter Media Microscopy Analysis

Netherlands Phenom Pure Scanning Electron Microscope

Media Selction

Failure Analysis

Dust Property Analysis

Bag Inspection

Fiber Inspection

Lifespan Analysis

Baghouse Efficiency and Effectiveness Analysis

Why Choose Us

Lower Energy Consumption

Our unique materials and advanced surface treatment technologies significantly reduce system pressure drop and minimize cleaning frequency, saving you tens of thousands of dollars in electricity costs annually.

Adaptable to Harsh Conditions

Whether it’s high temperature, high humidity, corrosive, or abrasive environments, we provide professionally customized filter bags for consistently excellent performance.

System Optimization, Comprehensive Enhancement

More than just filter bags, our solutions optimize your entire dust collection system, boosting efficiency and ensuring continuous production.

Built to Last

Increase service life by over 30%. Our unique finishing treatments make bags more resistant to abrasion and corrosion, reducing your replacement costs.

Custom Solutions

Submit your operating conditions, and our engineers will provide a free material selection plan and optimization advice within 24 hours.

One-on-One Technical Support

Our expert team provides comprehensive guidance from selection and installation to maintenance, ensuring stable operation of your dust control system.

Get In Touch With Our Team

Fill out the form now and get your FREE customized solution!

  • Precise material selection
  • best price
  • One-on-one dedicated solution (save 20%-35% on costs)
  • Direct from factory—no middlemen, better value!