PTFE, also called polytetrafluoroethylene, has excellent chemical stability, can withstand corrosion from strong acids and alkalis, and has a wide temperature tolerance.
Therefore, it has great advantages compared with other filter materials.
The current production processes for polytetrafluoroethylene filter membranes include calendering membrane method, turning membrane method and stretching membrane method.
The stretch film method can be divided into one-way stretching and two-way stretching.
In some special breathable application fields, such as automobile breathability, medical breathability, and food packaging, traditional hydrophobic PTFE membranes lose their breathable protection function.
So PTFE needs to be treated with oleophobicity. Fluoromethyl groups with lower surface energy are usually placed on the surface of the membrane. This type of fluoroalkyl material itself is non-toxic and harmless, so it has a wide range of applications.
The main feature of polytetrafluoroethylene filter membrane is surface filtration, which can improve filtration efficiency and improve the problems of increasing filtration pressure and high concentration of fine dust emissions that often occur in traditional filtration methods.
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