How To Choose Filter Material According to Filter Media Properies?

Jan 13, 2023

Due to the variety of materials and specifications of filter bags in real life.  Therefore, when choosing filter bags, we should also choose according to the nature and actual needs of different filter medias.

Polyester Fiber

Polyester filter media are usually used in low temperature situations, and membrane mulching is usually not needed. Only when the discharge requirement < 30 mg/Nm ³, or when the dust is very fine and the humidity is high.


Polytetrafluoroethylene (PTFE), also known as Teflon, is stretched to become a strong multi-porous material with a pore size of 0.1μm ~ 2.0μm, a porosity > 80%, excellent chemical corrosion resistance, cold and heat resistance, long-term use at-200℃ ~ 250℃, good electrical insulation and smooth surface properties.

Polytetrafluoroethylene filter materials are often treated with film mulching or acupuncture to improve dust removal efficiency and prolong filter bag service life.


Nomex filter media can be used for filter bag in the case of higher temperature and thicker dust particles. Nomex has good resistance to high temperature and is more resistant to bending than fiberglass. It can use higher injection pressure and can inject more filter bags with the same pulse valve.

Glass Fiber

Glass Fiber has good high temperature resistance, tensile resistance, acid-alkali resistance and hydrophobicity, but the glass fiber filter material is not resistant to bending, easy to be damaged in installation and operation, can not be cleaned under high pressure, and has high requirements for filter bag skeleton.

After secondary treatment and film coating, the filtration performance of glass fiber is very excellent, and it has been widely used as filter bag material in Europe and the United States.


The high temperature resistance of P84 filter bag is slightly lower than that of glass fiber, the acid and alkali resistance is good, and the price is more expensive.

Because of its special fiber structure, it is usually unable to cover the membrane, so the filtration efficiency is not as good as that of the coated filter bag.

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