[Specifications] diaphragm squeeze film once completed, a minimum thickness of 2 ± 0.2mm, opening the way to a mechanical incision, hole size of 1mm * 1mm. Matrix is ??EPDM rubber, tubular membrane itself without seals Hardness: 55 Shore A, density: 1.115 g / cm3, tensile strength ≥11 N / mm2, elongation ≥450%, compression set of ≤30%, Tear strength ≥ 10.5 N / mm; the basic characteristics of film - have sufficient elongation at break and tensile strength pressure; Film perforating direction should be perpendicular to the film grain to increase the anti-peeling of the film; - membrane porosity of about 180 000 / m2 ; EPDM membrane [Features] 1, the EPDM membrane has excellent resistance to weather, ozone, heat, acid, water vapor, color stability, electrical properties, oil-filled and normal liquidity . Such diaphragm adding suitable antioxidants can improve its operating temperature. 2, fine bubbles, even, better flow rates, the state. 3, using the German CNC machine tools drilling to avoid damage to the diaphragm is generally caused by mechanical drilling, leading to the diaphragm tear, reduced service life. EPDM diaphragm Hebei-Hong Kong in addition of carbon black, it enhances its resistance to UV, ozone and other strong oxidation performance, but it also has anti-corrosive effect of oil, acid, etc., which can effectively prevent the contraction of the deformable membrane and the like; silicone membrane [Features] 1, the silicone membrane using laser drilling, surface smooth easy attachment of microbes, and sediment low affinity. 2, silicone membrane temperature, anti-oil, there is a strong resistance to chemical corrosion, non-biodegradable. 3, silicone rubber membrane does not contain plasticizers, can permanently maintain flexibility, it will not harden and aging, anti-bacterial properties and long service life, silicone rubber membrane has a patent can inhibit biofouling.