Hydocs polypropylene (PP) pleated filter cartridge is made of polypropylene microfiber hot-melt entanglement, and the fiber randomly forms a three-dimensional microporous structure in space. The cage, core, and end cap of the filter cartridge all adopt hot-melt welding technology, does not contain any adhesive, clean environment production, no pollution, no leakage, and has broad chemical compatibility. The precision range of the filter cartridge is 0.1-50μm, and the size is 5inch, 10inch, 20inch, 30inch, 40inch, etc. It has the characteristics of high flow rate, large pollutant retention capacity, broad chemical compatibility and so on.