Classification and application of PTFE membrane
1, PTFE clothing film
Microporous films made of polytetrafluoroethylene resin are made of biaxial tensile method by using the pore forming properties of polytetrafluoroethylene resin. The membrane surface can reach about one billion per square centimeter of micropores, each pore diameter (0.1 m-0.5 m) than water molecule diameter (20 M-100 m) small hundreds of times, than water vapor molecules (0.0003 m-0.0004 m) in ten thousand times. The water vapor can pass, and not through the water, and the microporous structure can achieve excellent waterproof function; also because of the extremely small hole and vertical irregular bend, the wind can not through, which has the characteristics of wind and warmth. The composite and other fabrics, widely used in military medical clothing, clothing, leisure clothing, fire, gas, water operations and other special protective clothing, outdoor sports clothing, shoes, hats, gloves and other accessories, sleeping bags, tents, umbrellas and other materials.
2, PTFE air ultrafiltration membrane
The polytetrafluoroethylene microporous membrane can be used for atmospheric dedusting, air purification and so on, because of its unique properties such as node, fibrous property, smooth surface, chemical resistance, breathability, water permeability, large air permeability, flame retardancy, high temperature resistance, strong acid and alkali resistance and non-toxic properties. The membrane is made of products with high filtration efficiency, up to 99.99%, close to zero emissions, low running resistance, fast filtration speed, long service life and reusable operation, thereby reducing operation cost. It is mainly used to filter the flue gas of various industrial furnaces, such as chemical, steel, metallurgy, carbon black, power generation, cement and waste incineration. Polytetrafluoroethylene filter membrane, the membrane pore size can be controlled from 0.2 to 15 mu m, the porosity of up to 85%.
3, PTFE air purification membrane
Air purification membrane with PTFE as raw material, after expanding to form a stretched microporous film, this film with the special process of covering fabric and material in various, become a new type of filtering material, the small pore size (0.05 ~ 0.45 m), uniform distribution and porosity. To keep the air circulation at the same time, all the dust particles can be filtered, including bacteria, purification and achieve the purpose of ventilation, it is widely used in pharmaceutical, biochemical, microelectronics and laboratory supplies etc..
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