Classification and Application of PTFE Membrane
1. PTFE clothing film
A microporous film made by biaxial stretching method using the pore forming characteristics of polytetrafluoroethylene plastic resin. The surface of the membrane can reach over one billion micropores per square centimeter, with each pore diameter (0.1 μ m-0.5 μ m) several hundred times smaller than the diameter of water molecules (20 μ m-100 μ m) and tens of thousands of times larger than the diameter of water vapor molecules (0.0003 μ m-0.0004 μ m), allowing water vapor to pass through while water droplets cannot. By utilizing this microporous structure, excellent waterproof and breathable functions can be achieved; In addition, due to the extremely small size and irregular vertical bending arrangement of the hole, wind cannot pass through, thus possessing characteristics such as wind resistance and warmth retention. After being compounded with other fabrics, it is widely used in military clothing, medical clothing, casual clothing, special protective clothing for firefighting, anti-virus, immersion operations, outdoor sports clothing, shoes, hats, gloves and other accessories, as well as sleeping bags, tents, rain gear and other materials.
2. PTFE air filtration membrane
By utilizing the unique characteristics of polytetrafluoroethylene microporous membrane, such as node fibrillation, smooth surface, chemical resistance, air permeability, high air permeability, flame retardancy, high temperature resistance, strong acid and alkali resistance, and non toxicity, it can be used for atmospheric dust removal, air purification, etc. The product made of this membrane has a high filtration efficiency, reaching 99.99%, and nearly zero emissions; Low operating resistance and fast filtration speed; Long service life, reusable, thereby reducing operating costs. Mainly used for flue gas filtration in various industrial furnaces such as chemical, steel, metallurgy, carbon black, power generation, cement, and waste incineration. Polytetrafluoroethylene filtration membrane, the pore size of the membrane can be controlled between 0.2 and 15 μ m, and the porosity can reach over 85%.
3. PTFE air purification membrane
Air purification membrane is made of polytetrafluoroethylene as raw material, which is expanded and stretched to form a microporous thin film. This film is then coated on various fabrics and substrates using a special process to become a new type of filtering material. The membrane has a small pore size (0.05-0.45 μ m), uniform distribution, and high porosity. While maintaining air circulation, it can filter all dust particles including bacteria, achieving the purpose of purification and ventilation. It is widely used in fields such as pharmaceuticals, biochemistry, microelectronics, and laboratory consumables.
