PP pleated element is pleated with internal and external supporting layers made of ultra thin PP fibrous membrane and non fabric cloth or (wire mesh), the shell central rod and end cap are formed with sweat soldering technology, no adhesive is contained, without any leakage, no secondary pollution. The element adopts the pleated pattern, the membrane is large in filtration area, the dirt holding capacity is huge, the differential pressure is low thus the service life is longer, the material of overall element is in 100% PP construction, the element could be widely applied for the good chemical compatibility.