What is the function of polyester needle punched filter felt?

Polyester Needle Punched Filter Felt is a non-woven filter material made of polyester fiber (PET) through a needle punching process. It has the characteristics of high strength, corrosion resistance, and heat resistance. It is widely used in industrial dust removal, air filtration, liquid filtration and other fields. In addition to the unique advantages of ordinary felt filter cloths such as high porosity, good air permeability, high dust collection efficiency, and long service life, this product also has a medium high temperature resistance grade, instantaneous temperature resistance up to 130°C, resistance to moderate acidity and alkali, and good wear resistance. It is a better and commonly used variety among felt filter materials.

1. Functions of Polyester Needle Punched Filter Felt
(1) High-efficiency filtration
Used to capture dust, particulate matter, smoke, etc., suitable for bag dust collectors, filter cartridges and other equipment.
The filtration accuracy can reach 1-10 microns, suitable for fine filtration of PM2.5, industrial dust, etc.
(2) Chemical corrosion resistance
Polyester fiber is resistant to weak acids, weak alkalis and organic solvents and is suitable for corrosive environments in the chemical, metallurgical, cement and other industries. 
(3) Temperature resistance
Long-term working temperature: ≤130°C (can withstand 150°C for a short time). Suitable for medium and low temperature working conditions such as general industrial flue gas and boiler dust removal. 
(4) High mechanical strength
The needle punching process makes the fibers tightly interwoven, tensile-resistant, wear-resistant and with a long service life. 
(5) Easy to clean and low resistance
The surface is smooth and dust is not easy to adhere. The pulse backwash cleaning effect is good and energy consumption is reduced. 
(6) Economical and practical
Compared with high-end filter materials such as PTFE and PPS, polyester needle punched felt has a lower cost and a high cost-effectiveness.

2. Polyester Needle Punched Filter Felt vs. Other Filter Materials

3. Frequently Asked Questions
(1). Is polyester needle punched felt afraid of high temperature?
Long-term use ≤130°C, short-term resistance to 150°C, above this temperature is prone to shrinkage and aging, it is recommended to use PPS or PTFE filter material.

(2). Can it be used in a humid environment?
Polyester fiber has a certain degree of moisture resistance, but long-term high humidity (such as wet dust removal) may cause fiber hydrolysis, it is recommended to do waterproof and oil-proof treatment (such as lamination or coating).

(3). How to improve filtration efficiency?
Surface coating (such as PTFE microporous membrane) can increase the filtration accuracy to 0.3 microns and achieve ultra-low emissions.

(4). How long is the service life?
Generally 1-3 years, depending on factors such as dust properties, cleaning frequency, temperature, etc.

4. Purchase recommendations
Select according to temperature: choose polyester for medium and low temperature (≤130°C), and choose PPS or PTFE for high temperature. Choose based on corrosiveness: PTFE coating or PPS filter media is recommended for strong acid and alkaline environments.
Special needs: Post-treatment (such as antistatic fiber blending) is recommended for antistatic, flame-retardant, waterproof, or oil-proof applications.