Filter Bags

Dust Filter Bags

Efficient, Durable & Customized Industrial Filtration Solutions

We are a Dust Filter Bags manufacturer,Our needle felt filter media and filter bags are engineered for industrial dust collection systems across multiple sectors, offering high filtration efficiency, durability, and cost-effectiveness.

PTFE Filter Bags

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PPS Filter Bags

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Glass Fiber Filter Bags

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P84 (Polyimide) Filter Bags

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Aramid Filter Bags

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Nomex Filter Bags

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Polyester Filter Bags

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Acrylic Dust Collection Filter Bag

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Normal Temperature Blended Filter Bags

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Antistatic Filter Bags

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Water & Oil Repellent Filter Bags

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PTFE Membrane Laminated Filter Bags

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Low-resistance dust filter bags

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Easy-Clean Design Filter Bags

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High-Temperature & Corrosion-Resistant Filter Bags

Custom Filter Bags

Custom Filter Bags

Custom Filter Bags

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

Filter bag processing details

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 bag sewing technology

Pinhole Sealing Technology

Seamless Sewing 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.

Application Industries

Our filter bags are engineered to meet the complex dust collection challenges across diverse industries.

Steel & Metallurgy

Cement & Building Materials

Power Generation

Waste Incineration

Chemical & Mining

Asphalt Mixing Plants

Our Benefits

PaveClean® Low Emission Filter Bags

◎ Lower Emission(<10mg/Nm³)
◎ Lower Energy Consumption
◎ Longer Service Life

CareClean® Low Resistance Filter Bags

◎ Lower Emission(<5mg/Nm³)
◎ Higher Airflow Rate
◎ Lower Energy Cost

Coal fired Asphalt Mixing Filter Bags Serie

◎ Flame retardant performance improved by 30%
◎ Resistant to hydrolysis and chemical corrosion
◎ Better Water & Oil Repellency

Reinforced Low Adhesion Treatmen

◎ Enhanced Dust Release Property
◎ Better Water & Oil Repellency
◎Effective under High Temperature

Our flexible supply chain management facilitates fast response-time to meet customer requirements and market changes.

01

Raw Material

Supplier Diversification, Material Sustitutability

02

Inventory

Dynamic Forecasting, Key Material Stockpiling

03

Collaboration

Collaborative Demand Forecasting, Custom Solutions

04

Manufacturing

Quick Line Changeover & Production Switching Multi-Skilled Workforce,

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Warehousing

Efficient Space Utilization, Rapid Turnover

06

Shipping & Delivery

Alternative Transportation Solutions, Quick Turnaround Order

Serving 10,000+ clients worldwide,Exported to more than 40 countries and regions worldwide.

We actively participates in the global supply chain service market, and we are committed to providing customers with high-quality products and services to promote local economic development.

OEM Market

Maintenance Market

01

Raw Material Inspection

02

Semi-finished Product Inspection

03

Finished Product Inspection

04

Factory Sampling Inspection

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 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

Aramid Fabric

Polyester Filter Cloth

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Custom Dust Filter Bag Solutions – Built Exactly for Your Process

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 – Built Exactly for Your Process

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

PTFE Filter Bags

Aramid Filter Bags

Polyester Filter Bags

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Galvanized Steel Filter Bag Cages

Stainless Steel Filter Bag Cages

Flat Filter Cage

filter bag cage for air dust collector 1

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Our Manufacturing Strength

With 21 years of expertise, we operate a 27,000㎡ modern production base equipped with automated needling lines, precision sewing machines, and cage welding facilities. Our capacity ensures stable supply for global industries.

1

Years of Serving Customers

1

㎡ – Modern Production Base

1

Customers Worldwide

1

Exporting Country

Autefa imported lines with dual-cylinder eight-zone carding

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.

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

USA PMI CFP-1100AX Pore Size Analyzer

FX3300-IV Air Permeability Tester (Switzerland)

Switzerland FX3300-IV Air Permeability Tester

Netherlands Phenom Pure Scanning Electron Microscope

Media Selction

Failure Analysis

Dust Property Analysis

Bag Inspection

Fiber Inspection

Lifespan Analysis

Baghouse Efficiency and Effectiveness Analysis

More Than Just Filter Bags

We’re Your Partner in Clean Air Solutions

Mass Production & Fast Sampling

With a monthly capacity of over 30,0000 filter bags and a rapid sampling service, we support global distributors and end-users with competitive pricing and stable supply.

R&D Capabilities

We also maintain a dedicated R&D center focusing on filtration innovation. Each year, we introduce new formulations and structural upgrades to adapt to more extreme operating environments.

Modern Factory Facilities

Our production base covers over 27,000 square meters, with 8 automated filter bag sewing lines and lamination systems for PTFE membrane coating.

Superior Performance

Achieve filtration efficiency of < 5mg/m³, exceeding industry standards and ensuring you pass environmental inspections with ease.

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.