PTFE biaxially stretched film is made through 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.
So what are the popular features and applications of this film? ?1. Close to zero smoke and dust emission rate, dust removal efficiency can reach more than 99.99%.
The minimum pore size of the film can reach 0.3um, which can capture most solid particles and liquid droplets.
??2. Because the ptfe biaxially stretched membrane filter material has good air permeability, it reduces the pressure difference, reduces the power consumption of the fan, extends the service life of the filter material, increases the startup rate, and reduces the workload of dust removal. Reduced the number of production shutdowns.
3. Due to the thorough cleaning, the filtration time can be extended, the cleaning cycle can be extended, the number of cleanings can be reduced, the wear and tear of the equipment can be reduced, and the amount of maintenance can be reduced. 4. It has wide applicability, and the ptfe biaxially oriented film has stable Chemical properties, high temperature resistance, corrosion resistance, water repellency, oleophobicity, etc.
Therefore, it also has good filterability for special gases with high temperature, high humidity, high corrosion and organic liquids.
So this filter material is widely used in metallurgy, chemical industry, coal, cement and other industries.
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