String wound filter cartridge is a kind of deep filter cartridge, which is made of the textile fabric string (polyprpylene,absorbent cotton and so on) precioudly winding onto the multihole axles according to the specific technology. With the honey-comb structure of loose outside and tight inside,it mainly filter the low viscisity and impurity matters, such as the suspension,particles,rust and other impurities. The kind of filter cartridge is used in filtering the tap water,drink,industrial water, living water,electroplate liquid,chemical liquid,oil,paint and so on.