What are the main applications for these filter bags?

These filter bags are primarily used in industrial settings where liquid filtration is required, particularly in chemical processing, food and beverage production, and pharmaceutical manufacturing. They are designed to handle a variety of liquids, including those that are water and oil-based, making them versatile for different filtration needs.

How do I determine the correct micron rating for my application?

The micron rating should be chosen based on the specific particle size that needs to be filtered out. For most industrial applications, a micron rating of 5-10 microns is effective for removing larger particles while allowing liquids to flow through with minimal resistance. If you are unsure, consult with a filtration specialist to determine the most suitable micron rating for your specific needs.

How do I maintain and clean these filter bags?

For optimal performance and longevity, it is recommended to clean the filter bags regularly, especially when they show a significant decrease in flow rate. Depending on the nature of the liquid being filtered, cleaning can be done using water rinse or a gentle detergent. Always follow the manufacturer's guidelines for cleaning and maintenance to ensure the integrity of the filter bags is not compromised.

Water- and Oil-Resistant Laminated Filter Bags

Efficient Filtration for Industrial Needs

Customization Service:

Specifications and dimensions can be customized according to customer requirements.

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Water- and Oil-Resistant Laminated Filter Bags Introduction

Water- and oil-repellent coated filter bags are made from polyester needle-punched felt as the base material, which is then coated with a microporous PTFE membrane and treated with water- and oil-repellent finishes. The coating creates a smooth surface with small, uniform pore sizes, enabling “surface filtration” that resists dust clogging. The product typically has a basis weight of 500–550 g/m², a thickness of approximately 1.7–1.8 mm, and an air permeability ranging from 1.8 to 5 m³/m²·min, with high filtration efficiency (emission concentration as low as ≤20 mg/Nm³).

Its continuous operating temperature generally does not exceed 130°C, with a short-term temperature resistance of 150°C, and it offers excellent dust release properties and cleaning efficiency. These filter bags are suitable for high-temperature, high-humidity flue gas conditions in industries such as cement, steel, and chemicals, where the gas contains high moisture content, trace amounts of oil, or poses a risk of static electricity. They effectively prevent filter bag clogging and extend service life.

Principle of Operation

The fiber surface is modified using fluorinated polytetrafluoroethylene (PTFE) emulsion additives to reduce surface energy and create a lotus-leaf effect; water droplets and oil mist cannot wet the fibers, and dust is less likely to absorb water and cake together, thereby alleviating filter bag clogging under condensation conditions.

⚠️ Note: “Three-Protection” Impregnation ≠ PTFE Coating

Two-Protection Impregnation: The fibers are modified throughout, resulting in deep-layer filtration;

PTFE Coating: A thin film is bonded to the surface, resulting in purely surface filtration.

Advantages

Anti-condensation and anti-clogging: In operating conditions involving flue gas containing moisture, small amounts of oil mist, and hygroscopic dust (clay, raw cement, pulverized coal), dust is less likely to absorb water, agglomerate, and adhere to the filter bags.
Good air permeability and low initial resistance. Compared to membrane-coated filter media, it operates at a lower differential pressure at the same filtration velocity, resulting in lower fan energy consumption.
Improved dust release. The smooth surface of the filter media allows the dust cake to detach more easily during pulse-jet cleaning, extending the cleaning cycle.
High cost-effectiveness. The production cost is significantly lower than that of PTFE-coated filter media; It can be combined with conductive fibers to create three-in-one filter bags that are water-repellent, oil-repellent, and anti-static.
Excellent abrasion resistance, suitable for applications with moderate dust abrasion.

Suitable Applications

Cement plant coal mills, raw material silo dust collection, blast furnace coal injection, grain processing, chemical drying dust, dust collectors with slight condensation, and environments with humidity between 60% and 85% where there is no significant liquid oil mist.

Key Technical Features

STEP 1

Polypropylene Material

Our filter bags are made from polypropylene, known for its high strength and resistance to chemicals, making them ideal for tough industrial applications.

STEP 2

Micron Rating

With a micron rating of 5-10 microns, these bags effectively filter out particles while maintaining fluid flow, ensuring optimal performance in liquid filtration processes.

STEP 3

Temperature Resistance

Capable of withstanding temperatures up to 150°C, these bags are suitable for high-temperature processes without compromising their integrity.

STEP 4

Chemical Resistance

Designed to be resistant to water and oil-based solutions, these bags provide reliable performance in environments where chemical resistance is crucial.