PP melt blown filter cartridge ( PP fiber filter cartridge) is a kind of tubular filter cartridge ,made of the nontoxic and fine polypropylene particle by craft of heating ,melting ,spinning, pulling and molding. It's not only widely used in water treatment and reverse osmosis system to remove bacteria, heavy metal ,dust and other harmful substances, but also used in filtration of  strong acid, strong alkali and organic solvent for  its excellent chemical compatibility .