PTFE Breathable film
PTFE membrane Introduction and microstructure characteristics
PTFE film is a microporous film made by means of teflon, etc., using special process, such as compression, extrusion and two-way stretching. PTFE film can be divided into clothing film, air filtration film, air purification film according to the use. PTFE membrane has a fiber-like microporous structure with a pore rate of more than 85%, 1.4 billion micro-holes per square centimeter and a aperture range of 0.02microm-15microm.
Microstructure of PTFE membrane:
1.The surface form of PTFE microporous film is a microporous structure with spider webs. The pores form between the microfibers, the direction of microfiber arrangement and the direction of stretching are basically parallel, and the connection of the fiber bundle is the node, which is formed by the entanglement of many microfibers.
2.THE PTFE MEMBRANE BELONGS TO THE ASYMMETRIC FILM, AND THE MICROPOROUS SIZE OF THE FRONT AND BACK OF THE MEMBRANE IS DIFFERENT.
3.The cross-sectional microporous size of the membrane is larger than the microporous size of its surface, and the dimensions of the cross-facing micropores also vary, and the vertical micropores are larger than the horizontal.
4.The cross-section of the membrane is a network structure, in the three-dimensional structure of the hole has mesh connectivity, hole set, hole bending and other very complex changes, there may be multiple micro-holes to form a channel, it is also possible that a microporous is connected to multiple channels.
PTFE membrane Classification and application
1.PTFE Clothing Film
Using the perforated properties of Teflon plastic resin, a microporous film made from a two-way stretch ingenuation square is used. The membrane surface can reach more than one billion micro-holes per square centimeter, each microporous diameter (0.1 pm 0.5ym) is hundreds of times smaller than the diameter of the water molecule (20ym-100ym), than the water vapor molecule (000 3m0.0004um) tens of thousands of times larger, so that water vapor can pass, and water droplets can not pass, the use of this microporous structure can achieve excellent waterproof moisture-through function: in addition, because the hole is extremely small and vertical non-spec bending arrangement, so that the wind can not pass through, Thus, it has the characteristics of wind resistance and warmth. After compounding with other fabrics, widely used in military clothing, medical clothing, casual clothing, fire, anti-toxic, water-soaked operations and other special protective clothing, outdoor sports clothing, shoes, hats and gloves and other accessories, as well as sleeping bags, tents, rain gear and other materials.
2.PTFE air filtration film
The unique node of useing of microporous membrane is primary fiber, smooth surface, chemical resistance, breathable water, breathable, flame retardant, high temperature, anti-strong acid base, non-toxic characteristics, can be used in the atmosphere dust, air purification and so on. The membrane is made of products with high filtration efficiency of up to 99.99%, near zero emissions, low operating resistance, fast filtration speed, long service life, reusable, thus reducing operating costs. Mainly used in chemical, steel, metallurgy, carbon black, power generation, cement, waste incineration and other industrial furnace flue gas filtration. Poly4fluoroethylene filtration film, the membrane aperture can be controlled between 0.2-15m, the clearance rate of up to 85%, PTE gas purification membrane air purification film is based on Teflon as raw material, after puffing stretching to form a kind of has Microporous film, this film with a special process to cover a variety of fabrics and substrates, become a new filter material, the film aperture is small (0.05-045ym), uniform distribution, large pore rate, while maintaining air circulation, Can filter all dust particles including bacteria, to achieve purification and ventilation purposes, it is widely used in pharmaceutical, biochemical, microelectronics and laboratory supplies and other areas OF PTFE membrane composite in a variety of specifications of textile fabrics to form composite fabrics, can be used in sports clothing, cold clothing, military, fire, public security, health care, anti-biochemical and other special clothing, shoes and hats, gloves and sleeping bags, tents and so on. PIFE membrane composite in the glass fiber, needle felt, P84 on the formation of coating filter material, can be widely used in chemical, steel, metallurgy, carbon black, power generation, cement, waste incineration and other industrial furnace flue gas filtration; PIFE membrane composite on non-woven fabric can form air purification filter material, can be used in dust-free workshops, laboratories, ventilation equipment, purification equipment, medical electronics and other industries of air purification.