1,First understand what is PTFE membrane?
Polytetrafluoroethylene (PTFE) membrane filter is made of polytetrafluoroethylene, which is expanded and stretched to form a microporous membrane. PTFE membrane filter is laminated on various fabrics or papers by a special process on the substrate, it becomes a new type of filter material with small and uniform pore size and large porosity. While maintaining air circulation, it can filter all dust particles including bacteria. To achieve the purpose of sterilization and purification and air circulation.
Polytetrafluoroethylene (PTFE) membranes are resistant to high temperatures, strong acids, strong alkalis, organic solvents, and oxidants. PTFE membranes and hydrophilic membrane filter are chemically compatible and resistant to most chemical solvents. PTFE membrane is chemically stable and inert, suitable for chemically corrosive organic solvents, aqueous solutions, and gases, and has resistance to most acids, alkalis, and solutions.
2,Now we can explain why we use PTFE filters based on the concept of PTFE membranes?
When PTFE is added to the bag it acts as the filter cake. Commonly known as Teflon. PTFE is used in many different applications from cookware to outerwear and more. When a PTFE membrane is laminated to a filter bag media it can enhance the performance of both the filter bag and the dust collection system.
Using PTFE microporous membrane unique node fibrillary, smooth surface, chemical resistance, air permeability, and water resistance, large air permeability, flame retardant, high-temperature resistance, strong acid, and alkali resistance, and non-toxicity, it can be used for air purification, atmospheric dust removal, and so on. The products made of the membrane have high filtration efficiency, up to 99.99%, near zero emission; low operating resistance, fast filtration speed; long service life, which can be reused, thus reducing operating costs. It is mainly used for flue gas filtration of various industrial furnaces such as the chemical industry, iron, and steel, metallurgy, carbon black, power generation, cement, and waste incineration. In the Polytetrafluoroethylene filter membrane, the pore size of the membrane can be controlled between 0.2~15μm, and the porosity can reach more than 85%.