pp filter (also known as meltblown filter)) is a tasteless and non-toxic polypropylene as raw material, after heating and melting, injection, traction, receiving molding made of filter media. pp filter with a uniform pore size, outside sparse within dense deep filter structure and has excellent characteristics of high filtration efficiency, acid and alkali. The suspended solids in the liquid, particles, rust and other impurities can be efficiently removed.