In addition to some advantages of ordinary needle punched filter felt, polypropylene needle punched filter felt bags are generally used in situations where the flue gas temperature is below 100 ℃ and the acidity and alkalinity are high, or for liquid-solid separation where the acidity and alkalinity are high, due to its superior acid and alkali resistance and lower softening point compared to polyester fibers.

In liquid-solid separation, polypropylene needle punched filter felt is usually used in conjunction with plate and frame filter presses, vacuum suction filters, belt filters, centrifugal filters, and other liquid-solid separation equipment.

Not only does it have good dimensional stability and low elongation, but it also has the advantages of low vacuum resistance, energy saving, and easy cleaning due to its smooth surface, pores, and high breathability. In industries such as mineral processing, coal preparation, petroleum, and chemical engineering, where small particles need to be filtered and filtered, polypropylene needle punched filter felt has much better performance than traditional woven filter media.