Advantages, disadvantages and classification of polytetrafluoroethylene filter membrane

Using PTFE as raw material, through special technology, biaxial stretching, and utilizing the unique node fibrillarity of polytetrafluoroethylene film, smooth surface, chemical resistance, breathable and impermeable, large air permeability, flame retardant, high temperature resistance, Resistant to strong acids and alkalis, non-toxic, etc., the products produced have high filtration efficiency, up to 99.99%, and are close to zero emissions; they have low operating resistance and fast filtration speed; they have a long service life and can be reused.

Disadvantages of polytetrafluoroethylene filter membrane: Once the membrane is formed, the shrinkage rate of its raw materials changes greatly, making processing and reprocessing more difficult; its elasticity is low, its texture is soft, its load-bearing capacity is not very high, and it is easy to Deformation occurs; thermal conductivity is low, resulting in negative manifestations such as cracking, deformation and expansion, etc.

Advantages of polytetrafluoroethylene filter membrane: It is a microporous film formed by stretching polytetrafluoroethylene resin particles at a temperature below the melting point and forming hot spots. It is a flexible and elastic microporous film. The porous material has uniform pore size distribution and is breathable and impermeable to water.

Polytetrafluoroethylene filter membranes are generally divided into the following types: air filter membranes, which can be used for atmospheric dust removal, air purification, etc., and are the best filter materials for various vacuum cleaners, air filters, and purification equipment; waterproof and breathable micro membranes Porous film, which is characterized by good windproof and warmth retention, is widely used in medical, fire-fighting, anti-virus, water-immersed clothing and outdoor sleeping bags and tents; polytetrafluoroethylene bubble-point film, this film is coated on various fabrics and On the base material, it becomes a new type of filter material. The membrane has small pore size, about 0.2-0.5μm, uniform distribution and large porosity. It can filter all dust particles including bacteria while maintaining air circulation, achieving advanced purification and For the purpose of ventilation, it is widely used in pharmaceutical, biochemical, microelectronics and laboratory consumables and other fields.

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