Spun Bonded Cartridge filters are manufactured through a process that thermally bonds pure Polypropylene microfibers with lower density at the outside surface and progressively higher density toward the center. The fluid to be filtered passes through the filter matrix and retains the particles inside the matrix which provides high efficiency and longer filters life.Spun Bonded Cartridges can be used either as a pre-filter or final filter for industrial, chemical process, pharmaceutical, food/beverage, cosmetics, water and other applications.