PP Oil Filter, Oil Purifier & Filter Cloth 1) oil filter, oil purifier, filter 2) material: PP 3) multi-applications 4) OEM Polypropylene (PP) Oil Filter, Oil Purifier, Filter Cloth Introduction: PP oil filter, oil purifier, its holding, collision, adsorption and other mechanism are alike the principle of gas filtration, applicable to the separation of liquid phase and solid phase, separation of ...