The coated filter material is usually a layer of polytetrafluoroethylene microporous membrane compounded on the surface of the general traditional filter material. Compared with ordinary filter media, the diameter of the void is reduced by several tens of times. The membrane has a small pore size of up to 0.3μm, which can capture most solid particles and liquid droplets.

Because the membrane surface material of the coated filter material is PTFE, the smooth friction coefficient is small, and the membrane surface is hydrophobic, and the adhesion between the dust layer and the filter material is small, and it is easy to split. No external force is required, and it can fall off due to its own weight, ensuring a clean surface of the filter material and good air permeability. This feature also makes the cleaning cycle of the equipment longer and reduces the wear and tear of the equipment.

Because the PTFE membrane has stable chemical properties, high temperature resistance, water repellency, oil repellency, etc., it also has good filtering performance for high temperature, high humidity, high corrosiveness and special gases containing organics, so the filter material is widely used In wind power and other industries.