ePTFE (expanded polytetrafluoroethylene) in recent years developed a new material, with a special processing of the film, is a great potential, functional materials. Microporous film surface covered with fibrous membrane cross-section is a network structure, three-dimensional structure in the pore network Unicom on bending and other very complex pore structure. The pore diameter of 0.1-0.5μM, the droplet diameter 1/5000-1/2000. Is 700 times the diameter of water vapor molecules. Therefore, it can prevent the passage of water molecules, and in the very low atmospheric pressure to allow air to flow freely. ePTFE is a stable chemical properties, good water, oil, dust, ventilation, acoustic performance of the functions through the film. 
 The company breathable materials and ePTFE polymer multilayer thin films prepared by special waterproof breathable membrane, producing a variety of waterproof, breathable breathing valve, respiratory plug-chip features such as respiratory devices, and according to different requirements of users and customers to design, develop special breathing valve products to meet the specific requirements of different users. 
 Product performance parameters: 
 1, water depth of ≥ 10M; 
 2, cooling air permeability to 1500ml/min/c m @ 70mbar; 
 3, the ventilation openings for the conical surface circulation method patents; 
 4, the top cover for the padlock structure can be effective shock, anti-high-pressure water jets impact each side, locking pull to 100n / m; 
 5, waterproof apron with new material, the temperature range up to -40 ℃ -180 ℃, water and steam performance, has good flexibility and resistance to deformation, anti-aging, anti-UV [in particular in the sunlight ultraviolet rays penetrating the strongest (290-400nm) wavelength] excellent resistance to the specific protection. 
 FDP waterproof breathable dust valve function and principles of heat 
 Waterproof, breathable, transparent sound 
 The series of products using PA66 making body, making silicone rubber gasket, functional pieces for the special waterproof breathable membrane, strong and light weight, almost smooth sound signals, and will not reduce the signal quality or strength, to maintain quality. Chemical resistance, weather aging. Functional membrane through special technical processing, both oleophobic properties, thereby greatly enhancing the durability of membrane permeability. Even long-term exposure to outdoor and industrial environments, repeated exposure to oil, chemicals, detergents and other low surface tension liquid, waterproof breathable dust cooling high performance of the valve remain unchanged. FDP waterproof breathable dust cooling water valve design can, and can make the water vapor discharge, and also allows free access to the gas, so that the body and balance to both dust and humidity and pressure purposes. This product can be kept waterproof, breathable, durable and excellent sound performance through powerful. 
 Balance pressure to eliminate moisture, dust, heat 
 All types of outdoor electronic products, cases are often subjected to temperature changes, wind and rain erosion and solar radiation. Ambient temperature fluctuations can cause pressure, it will adversely affect the equipment housing. Waterproof and dustproof enclosure cooling vent valve to balance internal and external pressures, to prevent air and moisture through the seal into the enclosure interior, and can effectively protect the integrity of the seal. Water vapor permeable membrane can also speed up the dissemination of speed, thus reducing the accumulation of water vapor inside the enclosure, and can quickly eliminate condensation surface of the device display, etc., for protection. Waterproof breathable dust cooling valve can adjust the pressure to avoid gas accumulation. In this case, the breathable film the role of the equivalent mechanical valve, but also effectively play a protective barrier to block dust, salt and other corrosive liquids invasion, extension of product performance and life and reduce unnecessary maintenance and waste and cost savings. 
 Application: home appliances, audio equipment, communications equipment, sensors, outdoor lighting, outdoor LED display, computer equipment, automotive exterior lighting, monitoring equipment and so on.