Views: 105 Author: Site Editor Publish Time: 2021-09-18 Origin: Site
There are mainly two kinds of PTFE film, microporous film and turning film. The biggest difference between the two is the permeability of microporous membrane, which is produced by biaxial tension. Turning film is cut by turning machinen and it is airtight. Here microporous membrane is mainly talked about. PTFE film includes expanded PTFE film, PTFE wraping film, etc.
Polytetrafluoroethylene (PTFE) microporous film is a kind of microporous film, which is made from polytetrafluoroethylene resin particles after expansion and stretching. It can also be divided into the following three types.
Polytetrafluoroethylene filter membrane can be applied for atmospheric dust removal, air purification, etc. The pore size of the membrane can be controlled to 0.2um and the porosity can reach more than 88%. It can be combined with needle felt, machine-made cloth, non-woven cloth, glass fiber and other filter materials to obtain the membrane covered filter material with surface filtration performance. PTFE membrane filter material has the characteristics of high peel strength, large air permeability and uniform pore size distribution.
Installed in the dust removal equipment as a dust removal bag or fold type dust filter cartridge, the ultra-fine dust calculated by micron can be quickly and effectively intercepted. The dust removal efficiency can reach more than 99.99%, the service life can reach 3 years and the air permeability can reach 3-6M/min. It is the most advanced air filter material in the world and the best choice for all kinds of vacuum cleaners, air filter elements, air purification equipment and high efficiency air filters.
The technical parameters are as follows.
Air permeability: 80-100l/m2·s
Polytetrafluoroethylene waterproof and moisture permeable microporous membrane is made by special process and biaxial stretching. The membrane surface can reach billions of micropores per square inch. The diameter of each micropore (0.1um-0.5um) is smaller than the minimum value of the smallest mist (20um-100un) in water molecules, but much larger than the diameter of water vapor (0.0003um-0.0004um). Therefore, water vapor can pass through but water droplets can not. This kind of microporous structure can achieve excellent waterproof and moisture permeability. In addition, because the holes are extremely small and longitudinal irregular bending arrangement makes it impossible for the wind to pass through, so they have the characteristics of good windproof and thermal insulation.
Since the membrane was invented, its firmness and durability have been greatly improved by special treatment on PTFE film and continuous improvement. After it is compounded with other fabrics, it is widely applied in military clothing, medical clothing, leisure clothing, special protective clothing for fire protection, biochemical protection, anti-virus, immersion operation, outdoor sports clothing, shoes and hats, gloves and other accessories, sleeping bags, tents and other materials.
The technical parameters are as follows.
Moisture permeability: 16000g/m2·24hr
Hydrostatic pressure: 6000 mm
UV resistance: 97℅
Gram weight: 5-10g/m2
It takes polytetrafluoroethylene (PTFE) as raw material and forms a microporous film after expansion and stretching. The membrane is coated on all kinds of fabrics and substrates by special technology and becomes a new type of filter material. The pore size of the membrane is about 0.2-0.5 μm. With uniform distribution and large porosity, it can filter all dust particles including bacteria while air circulation is maintained, so as to achieve the purpose of advanced purification and ventilation. It is widely applied in the fields of pharmacy, biochemistry, microelectronics and laboratory consumables.
Its technical parameters are as follows.
Bubble point: ≥1kg/cm2 (5.3m/s 127pa)
Teflon film includes ePTFE film, PTFE cable film and so on.
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