Huzhou Sennuo Fluorine Material Technology Co., Ltd ePTFE air purification composite material 02 ePTFE air purification composite material is a product in which the ePTFE membrane is attached to various non-woven fabric substrates by high-temperature thermal compounding and adhesive compounding for high-precision filtration. Test standards: * Resistance (EN1822-3: 1998) wind speed 5.33cm / s) * Efficiency (GB19083 EN134) Test conditions: air flow 32L/Min filter test particle size (DOP): 0.1-0.3um ePTFE liquid filtration membrane EPTFE waterproof and breathable membrane is made of PTFE resin as raw materials, through special process, like two-way stretch, using unique technology for forming between 100-500nm in diameter of microporous membrane, and per square centimetre has more than 10 microporous, which is 700 times larger than the water vapor molecules, 10000 times smaller than water molecules.It makes the membrane allows both air and water vapour freely through the membrane,also can keep the water out of at the same time.So it can protect the service life of electronic components. Testing standards: *: Air permeability: ASTM D737-1996 *: Water pressure resistance: ISO811