Fiberglass stabbed filter felt (filter bag / bag) with reactive fluoride additives prepared mixed working fluid impregnated filter, the working fluid and filter fiber macromolecular structure of certain groups react, the formation of macromolecular chain, change Fiber and water, oil affinity performance, so that the surface tension of the filter to reduce to less than the surface tension of water and oil in order to achieve the purpose of water and oil repellent. All kinds of filter materials by water and oil repellent treatment, can form a molecular barrier around the fiber surface to prevent water and all kinds of oil contamination and penetration.Compared with ordinary filter, not only has the characteristics of water and oil repellent, but also for dust But also has anti-sticking property and easy releasability.