FMS Filter Bags

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.

We Craft Every Filter Bag with Care

Our filter bags are designed based on actual site conditions, not generic catalog assumptions. We help you select the right media to balance filtration efficiency, pressure drop, and service life.

Consistent airflow performance

Stable filtration efficiency

Long replacement cycles

Reduced maintenance downtime

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FMS filter bags are a new type of high temperature resistant filter material developed for dry dust removal of blast furnace gas. They are made of two or more high temperature resistant fibers mixed or layered to achieve higher and newer physical and chemical properties. Usually, P84 fiber is added to the glass fiber needle felt to make the felt layer denser, the entanglement between fibers is enhanced, and it can cope with higher filtration wind speeds. It has the characteristics of high strength, acid and alkali corrosion resistance, wear resistance, and bending resistance. After different surface chemical treatments and post-processing technologies, it also has the functions of easy cleaning, waterproof, and oil resistance.

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Glass fiber composite dust collector bag

About FMS Filter Bags

Materials: FMS filter bags are often made from materials like fiberglass, P84, aramid (Nomex), or other specialized fibers depending on the application’s temperature and chemical requirements.
Efficiency: These filter bags are designed to provide high filtration efficiency, capturing fine particles and ensuring clean air or fluid output.
Design: They come in various designs, including different shapes, sizes, and types of closures (snap bands, rings, etc.), to fit different types of baghouses or filtration systems.
Temperature Resistance: Depending on the material, FMS filter bags can withstand varying temperature ranges, making them suitable for different industrial environments.
Chemical Resistance: Some FMS filter bags are treated or made from materials that offer resistance to chemicals, ensuring longevity and performance in harsh conditions.

Specifications

Material	Alkali-free glass fiber chopped yarn, aramid, P84.
Weight (g/㎡)	800
Thickness (mm)	2.6
Breathability (m³/㎡.min)	12～16
Working temperature (instant)	280℃
Working temperature (long-term)	100～200℃
Breaking strength (warp)	400N/5×20cm
Breaking strength (weft)	1600N/5×20cm
Acidity	Excellent
Alkalinity	Excellent
Post-processing method	Impregnation, drying, lamination, waterproofing.

Application

Asphalt Mixing Plants

Non-Ferrous Metals Plant Dust Collection

Steel & Metallurgy

Chemical & Mining

Power Generation

Waste Incineration

Renewable Energy Industry Dust Collection

New energy sector

Cement & Building Materials

Pulp and Paper Industry

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

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 – 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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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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Filter Bag Cages

Envelope Cage

Multi-piece round cage

Venturi-integrated round cage

From Sample Analysis to Engineered Filter Solutions

Our Services

Step 1

Sample Analysis & Application Review

Analyze fabric structure and material composition

Review wear patterns, clogging or failure reasons

Evaluate dust characteristics and operating conditions

Step 2

R&D & Material Engineering

Needle felt material selection and optimization

Fiber blend, weight and permeability design

Surface treatments (PTFE membrane, singeing, glazing)

Step 3

Filter Bag & Cage Design

Accurate size and construction

Cage wire layout and surface finishing

Compatible with pulse jet and cleaning systems

Step 5

Fast & Transparent Quotation

Material specification

Unit price & MOQ

Lead time and delivery terms

Step 4

Sampling & Confirmation

Custom samples for testing

Performance confirmation before mass production

Adjustments based on test feedback

Step 6

Manufacturing, QC & Delivery

All products are manufactured under strict quality control and shipped with export-ready packaging.
Ongoing technical support is available after delivery.

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.

Years of Serving Customers

㎡ – Modern Production Base

Customers Worldwide

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

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

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

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.