PTFE Membrane Filter Bags

When traditional filter bags filter dust, the accumulated dust inside them often adheres to the primary layer cake. This is the main reason for the blockage phenomenon and the reduction of dust collector efficiency. The ordinary deep filter material becomes a surface filter through the film coating, and the dust is trapped on the surface of the filter material and cannot enter the inside of the filter material, which makes the ordinary filter material have a qualitative leap. PTFE (polytetrafluoroethylene) membrane is made of dispersed PTFE resin powder and stretched through a series of special processes. It has a fibrillar microporous structure with a porosity of more than 85%. There are 1.4 billion micropores per square centimeter and the pore size ranges from 0.02um to 1.5um. The membrane surface of the membrane filter bag replaces the traditional primary layer cake with a uniform and fine pore size, making the dust penetration rate close to zero. Because PTFE has many unique properties and biaxial stretching, it forms a multi-layer crossed fiber-node microstructure. Make it useful in dust filtration occasions.

Main Advantage of PTFE Membrane Filter Bags

• High filtration efficiency

The PTFE-coated dust filter bag can retain micron-level ultra-fine dust, especially PM2. 5 particles that are harmful to the human body. The efficiency is maintained at a high level and almost zero emission is achieved. At the same time, it can also be used for the recovery of ultra-fine particle products to reduce product consumption, achieve energy saving and emission reduction, and meet the requirements of emission standards.

• The running resistance is stable and easy to clean

Although the resistance of the film-coated filter material is higher than that of the ordinary filter material at the beginning of use, as the operating time increases, the resistance will not increase rapidly with the extension of time, and the cleaning effect is good, the cleaning cycle is long, and the cleaning pressure is low, reducing the friction and friction coefficient between the dust and the filter material.

• High air flux and long service life

Because the surface of the film-coated filter material is smooth and water-repellent, the dust is thoroughly cleaned, and a high ventilation rate is always maintained, which better solves the contradiction between filtration and dust removal, thereby improving the service life of the filter bag. Polytetrafluoroethylene (PTFE) is known as “the king of plastics” for its excellent and unique properties. Under the situation that the world is paying more and more attention to environmental protection and sustainable development, the application of PTFE in bag filter media (bags) can be said to be in the ascendant and has broad application prospects. It is believed that various PTFE-based yarns and textiles, film and emulsion treatment agent and other new products will emerge one after another, laying a more solid foundation for the upgrading of bag filter bag products.

---

Performance Parameters

Material	Working Temperature	Instant Temperature	Abrasion Resistance	Hydrolysis Resistance	Acid Resistance	Alkali Resistance	Oxidation Resistance
Polyprolene + PTFE	90℃	110℃	Good	Excellent	Excellent	Excellent	Middle
Acrylic + PTFE	120℃	130℃	Middle	Good	Good	Middle	Good
Polyester + PTFE	130℃	150℃	Excellent	Poor	Middle	Fair	Good
PPS + PTFE	180℃	200℃	Good	Excellent	Excellent	Excellent	Fair
Aramid + PTFE	204℃	220℃	Good	Middle	Middle	Good	Middle
P84 + PTFE	240℃	260℃	Good	Middle	Middle	Middle	Good
Fiberglass + PTFE	250℃	280℃	Fair	Good	Middle	Fair	Good

Application of PTFE Membrane Filter Bags

• Industrial dust filtration

PTFE membrane filter bags can effectively remove pollutants, prevent harmful substances from contaminating the filter medium, protect the normal operation of the filter, and improve the performance of industrial filters.

• Liquid filtration

PTFE membrane filter bags can effectively remove impurities in water, purify water quality, and meet people’s drinking needs.