During the operation of the bag dust collector, the gas contains a variety of components, and the moisture, oily, dust-absorbing, and deliquescent dust in the dust may form a water film or oil film, which increases the adhesion and thus increases the difficulty of cleaning. Especially when the high-temperature gas is in a high-humidity state, condensation occurs due to the cooling of the external air, which will not only cause the collected dust to scale on the surface of the filter bag, and may even block the filter bag, but will also corrode the structural material of the filter bag, causing the dust collector to the increase in operating resistance directly affects the normal operation of the bag dust collector.

Water-repellent and oil-proof polyester needle-punched felt bags can effectively prevent the adhesion and penetration of water and various oil contaminants. Compared with ordinary filter media, it is water- and oil-repellent, resistant to scaling, and easy to peel off dust.