PTFE Filter Bags – High-Performance Filtration for Demanding Applications

PTFE filter bags, often referred to as Teflon® filter bags, are manufactured from polytetrafluoroethylene (PTFE) – a premium synthetic polymer known for its exceptional properties. PTFE is hydrophobic (water-repellent) and offers outstanding chemical resistance, non-stick characteristics, high-temperature stability, and a low coefficient of friction. These features make PTFE filter bags an excellent choice for a wide variety of industrial filtration applications.
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Product Description

Key Filtration Characteristics:

High Filtration Efficiency

The micro-porous structure of PTFE creates a large surface area that captures particles effectively, including submicron-sized contaminants. As a result, PTFE filter bags consistently achieve filtration efficiencies of over 99%, making them ideal for facilities required to meet strict air quality standards.

Chemically Inert

PTFE resists attack from most corrosive chemicals, making it suitable for filtering aggressive or acidic gas streams. This chemical stability extends bag life and minimizes the risk of media degradation or failure.

Excellent Thermal Stability

PTFE filter bags maintain their performance even under extreme heat. With a continuous operating temperature of up to 240°C (464°F), they are well-suited for high-temperature applications such as industrial furnaces, incinerators, and kilns.

Low Friction Coefficient

The non-stick surface of PTFE prevents dust from adhering to the bag, promoting excellent dust cake release. This makes cleaning easier, reduces the frequency of bag replacements, maintains consistent filtration performance, and lowers maintenance costs.

Excellent Hydrolysis Resistance

PTFE’s water-repelling nature ensures reliable performance in applications where moisture or humidity is present, preventing bag degradation caused by hydrolysis.

Excellent Oxidation Resistance

PTFE is highly resistant to oxidative damage, which enhances the longevity and durability of filter bags in hot, moist, or oxygen-rich environments.

 

Additional Advantages:

Long Service Life – PTFE filter bags perform reliably for extended periods, even under challenging operating conditions, leading to significant long-term cost savings.

Easy to Clean and Maintain – Simple maintenance reduces system downtime and boosts overall productivity.

Lower Energy Consumption – The superior cleaning efficiency of PTFE filter bags helps reduce pressure drop across the filter media, improving the energy efficiency of the entire dust collection system.

 

Technical Parameters

Fiber Composition50% PPS + 50% PTFE
Filter Material50% PPS + 50% PTFE Needle-punched surface layer with 20% fine fiber, pure PTFE base fabric
Bag Sewing ProcessPTFE sewing thread (3-needle, 6-thread)
Weight≥550 g/m²
Thickness1.8 mm
Density0.33 g/cm³
Air Permeability130 L/dm³.min
Tensile Strength (Longitudinal)≥800 N/5 cm
Tensile Strength (Transverse)≥1100 N/5 cm
Elongation (Longitudinal @ 200N/5cm)<2%
Elongation (Transverse @ 200N/5cm)<2%
Heat Shrinkage @ 210°C, 90min<1.5%
Bursting Strength≥300 N/cm²
Long-Term Operating Temperature @ 8% Oxygen<160°C
Long-Term Operating Temperature @ 10% Oxygen<150°C
Post-TreatmentSingeing, calendering, heat-setting, oil & water-repellent coating, PTFE coating

Applications of PPS+PTFE Filter Bags

Our PPS+PTFE filter bags are designed for tough industrial environments, offering high efficiency, excellent chemical resistance, and thermal stability. Typical applications include:

Waste Incineration – Efficiently treats flue gas containing dust, dioxins, heavy metals, and other harmful substances.

Coal-Fired Power Plants – Handles high-temperature, high-dust-concentration flue gas from coal-fired boilers with reliable performance.

Cement Industry – Suitable for kiln head and kiln tail flue gas treatment under high-alkalinity and high-humidity conditions.

Steel Industry – Used for purifying blast furnace gas and converter gas in harsh environments.

Chemical Industry – Effectively treats flue gas containing corrosive gases such as acids, alkalis, and organic solvents.

Durable, cost-effective, and easy to maintain – FilterEXP delivers reliable filtration solutions for global export.