The PP cotton filter element is made of polypropylene resin as a raw material to make fibers, which are bonded by the fiber itself. The structure of the filter element is a structure with thick outer layer fibers, thin inner layer fibers, loose outer layer, and tight inner layer. Filtering from outside to inside, the closer to the inner layer of the filter element, the smaller the pore size, the higher the filtration accuracy.This unique gradient deep filtration has formed a three-dimensional filter residue effect, which can be multi-layered and deep structure, with large dirt holding capacity; PP melt blown filter element is strong, when the filter inlet and outlet pressure difference is 0.4Mpa, the filtration flow rate is large, and the pressure difference is small , The filter core is not deformed; It integrates surface, deep, coarse and fine filtration; It has the characteristics of large flow, corrosion resistance, high pressure. It is used to block large particles such as rust, sand and insect eggs in the water.