Generally, it is a five layer structure, which is divided into four parts: protection layer, filter layer, separation layer and support layer. This kind of filter material has not only uniform and stable filtering accuracy, but also high strength and rigidity. It is an ideal filter material when the requirements for compressive strength and filtering granularity are high. Due to its surface filtration mechanism and smooth mesh channels, it has excellent backwash regeneration performance and can be used repeatedly for a long time, especially suitable for continuous and automatic operation process, which is incomparable to any filter material. The sintered mesh material is easy to be formed, processed and welded, and can be processed into various forms of filtering elements, such as round, cylindrical, conical, corrugated