Now there are new materials that prevent dust from entering the interior of the filter cloth without reducing the breathability, such as spraying or covering the surface in contact with the dust with an ultra-thin fluorinated resin microporous film.
The polytetrafluoroethylene filter bag membrane is hydrophobic. The smooth surface will not only prevent dust from sticking to it, but will also greatly reduce the phenomenon of bag sticking caused by adhesion of dust with a high moisture content.
Polytetrafluoroethylene filter bag membrane is made by special processes such as mixing, extrusion, extrusion, calendering, and biaxial stretching.
Due to the characteristics of ptfe fibrillation, when performing unidirectional stretching (i.e. longitudinal stretching), the ptfe polycrystalline aggregates begin to extend and form some fibrils. The fibrils are parallel to the stretching direction. At the same time, the fibrils The length increases.
The cross-section of ptfe fibrils is wide and thin, its maximum width is about 100nm, and the smallest fibril is ?0.5??1.0nm.
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