PTFE microporous membrane is a microporous film produced by special processes such as premixing, extrusion, calendering, and biaxial stretching using polytetrafluoroethylene dispersion resin.
The surface morphology of the microporous film is a spider web-like microporous structure.
Pores are formed between the microfibers, and the arrangement direction of the microfibers is basically parallel to the stretching direction; the junction of the fiber bundles is the node, which is formed by the entanglement of many microfibers.
PTFE microporous membrane is an asymmetric membrane, and the micropore sizes are different on the front and back sides of the membrane.
The cross-sectional micropore size of the membrane is larger than the micropore size on its surface, and the vertical and horizontal micropore sizes are also different, with the longitudinal micropores being larger than the transverse ones.
Using the unique node fibrillarity, smooth surface, chemical resistance, air permeability and water impermeability, large air permeability, flame retardant, high temperature resistance, strong acid and alkali resistance and other characteristics of the PTFE filter membrane, it can be used for atmospheric dust removal, air purification, etc. .
Because the porosity of PTFE microporous membrane is as high as 80%, the average pore diameter is 0.2μm, and it has dimensional stability, chemical resistance and high and low temperature resistance, it occupies an important position in the application field of filter materials.
PTFE membrane filter material has been widely used in flue filtration and hot air filtration in chemical plants, power plants, cement plants, carbon black plants, etc.
PTFE membrane filter material can not only remove dust, but also resist the chemical corrosion of smoke, and can recover valuable compounds. In addition, through the surface hydrophilic modification of the PTFE microporous membrane, PTFE membrane filter material can also be used for certain liquids. filter.
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