The economical and longer life cycled depth cartridge filters are constructed of the pure polypropylene fibers. It has the used 100% PP chips and grooved pattern to increase mechanical strength. There is no deformation in the process line and it has the excellent uniformity. We produces the filters in the melt-blown process. It is available to have a wide selection of micron ratings from 0.5㎛ to 150㎛. The materials are on the FDA listed as acceptable things to be portable and edible.