Water repellent and oil polyester needle felt in baghouse operation, the gas contains more moisture and dust as well as moisture absorption and easy deliquescence oily dust, surface dust may be generated in the water film or film increases adhesion, Although this helps to trap the dust, but cleaning will be difficult. Especially in high humidity and high-temperature gas state, due to the cooling effect of the outside air to produce condensation. This not only makes the dust trapped in the bag surface fouling, or even blocked, and can corrode structural materials, so that dust collector running resistance increases directly affect the normal operation of the baghouse. In view of this, the general media must be further improved in functionality, in order to apply this special working conditions, prevent or reduce dust paste bag, and enhanced filter life and work efficiency. In recent years, our selection of reactive fluoride additives for polyester, polypropylene, anti-static needle felt, aramid needle felt other media for post-processing, have achieved the desired effect of water repellent and oil. Not only water repellent and oil grade tests meet national standards, and does not affect the appearance of the original style and inner needle felt indicators. Water repellent and oil mechanism: reactive fluoride additives formulated with mixed working fluid impregnated filter, so that the working fluid and the filter fibers macromolecular structure of certain groups react to form macromolecular chains, changing the fiber and water, oil affinity to, the filter reduces the surface tension, to less than the surface tension of water and oil, water repellent and oil in order to achieve the purpose. Production process: fiber opening --- comb --- stack network --- I --- calendering acupuncture acupuncture --- Main --- impregnated water repellent and oil heat the working fluid --- Baking --- stereotypes --- Finished kinds of dust filter bag by a water-repellent and oil repellent treatment, can form molecular barrier around the fiber surface to prevent buildup of water and various oil thing and penetration. Compared with ordinary filter, only with a water repellent and oil properties, but in terms of dust, but also has anti-blocking properties and ease of peeling. The product is particularly suitable for rain-fed areas of the South, or the air humidity and filtration applications.