We Craft Every Filter Cloth with Care

Our filter cloth 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

Polyester Filter Bags

Polyester (PE/PET) filter bags are made by needle punching .Polyester is a low-cost, widely available standard fiber used across manyindustries for industrial air filtration. It offers excellent tensile strengthand oxidation resistance with good mechanical stability.

  • High Filtration Efficiency: Polyester filter bags can efficiently capture fine dust, particles, and contaminants due to their dense fiber structure.
  • Durability and Strength: Polyester fibers are strong and resistant to tearing and abrasion, which extends the lifespan of the filter bags.
  • Chemical Resistance: Polyester fibers exhibit good resistance to many acids and alkalis, making them suitable for use in harsh chemical environments.
  • Solvent Resistance: Polyester fibers are resistant to a wide range of solvents, enhancing their applicability in various industrial processes.
  • Thermal Stability: Polyester fibers can operate effectively in temperatures up to approximately 130°C(266℉) .
  • Moisture Resistance: Polyester fibers inherently repel water, making these filter bags effective in applications where moisture is present.
  • Lower purchase cost
Polyester Filter Bags

Technical Specifications

ITEMPE155PEF155PEF953
Working temperature (°C)130130130
Peak temperature (°C)150150150
Emission (mg)/105
Weight (g/m2)550±5%550±5%530±5%
Thickness (mm)2.2±10%2.2±10%1.9±10%
Air permenability (m3/m2/min@200Pa)14±20%12±20%13±20%
Tensile strength/ warp(N/5cm)≥1000≥1000≥1000
Tensile strength / weft(N/5cm)≥1400≥1400≥1400
Tensile elongation / warp(%)≤35≤35≤35
Tensile elongation / weft(%)≤50≤50≤50
24-hour heat shrink / warp(%)≤1.5≤1.5≤1.5
24-hour heat shrink / weft(%)≤1.0≤1.0≤1.0

Post-treatment: Anti-Stati / Water & Oil Repellent / PTFE Dipping / PTFE Membrane

PE155

PTFE Membrane Laminated Polyester Filter Bag

PEF155

Polyester Microfiber Filter Bag

PEF953

Low-Resistance Abrasion-Resistant Polyester Filter Bag

Needle Felting Treatment

To further enhance performance, we provide a series of advanced post-treatment processes that improve fabric durability, filtration efficiency, and adaptability to various working conditions.

Anti-Static Filter Bags
Stripe Line Polyester Anti-static Filter Bag
涤纶2

Blending Fiber Polyester Anti-static Filter Bag

Grid Anti-Static Filter Bags
Cross Line Polyester Anti-static Filter Bag

PTFE membrane enables surface filtration.

Scanning electron microscope image after PTFE impregnation

Shapes and Types

Polyester filter bags can be made into different shapes, which can be mainly divided into the following three types:

1.Round type.

2.Flat type.

3. Star/pleated type.

Round and Flat Polyester Filter Bags

Proven in Diverse Industries

In dry conditions without acidic gases, polyester filter bags deliver stable performance, helping you reduce energy consumption, extend equipment lifespan, and easily meet environmental requirements.

Asphalt Plant

Helps in capturing dust and particulates emitted from kilns and dryers.

Chemical

Used to filter liquids in chemical manufacturing processes, ensuring product purity and protecting equipment.

Cement Plant
waste-incineration
Power Plant
Non-Ferrous Metals

Filters out welding fumes and metal particles as well as metal dust generated during grinding and polishing operations.

Related Products

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

PPS+PTFE Filter Bags

PTFE Filter Bags

节净达

Aramid 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

3I4A0087 副本

Filter Bag Cages

3I4A0071 副本

Envelope Cage

cage

Multi-piece round cage

bag cage

Venturi-integrated round cage

Our Manufacturing Strength

Aokai Environtec is a leading manufacturer of baghouse filter cloth, filter bags, and baghouse accessories. 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 Experience
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)

1,000,000 ㎡

Smart Warehousing

Our Manufacturing Process

From Fiber to Filter: Full Control of Quality

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

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

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Aokai-Introduction

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Product Catalog

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About Aokai Envirotec

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Dust Collection for Asphalt Mixing Plants

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