Needle punched felt are mainly used for liquid filtration, air filtration and dust collection. Compared with ordinary filter material, needle punched felt have many advantages as following:

1. High hole rate and good air permeability can increase the loading ability of the equipment and reduce loss and energy consumption.
2.   High efficiency of cleaning and low density of gas. Gas density can be greatly lower than the country standard stipulat
3. After heating, singeing and coating treatment, the surface should be smooth, difficult to stop up and out of shape, easily dedusting and long using- life usually 1to 5 times longer than mechanical filter cloth
4.  Extensive use and good chemical stability. It can filter normal atmospheric temperature or high temperature gas including corroding gas mixed with acid and alkali, water, oil

Needle punching felt is widely used in metallurgy, chemical industry, building materials, smelting, generating eletricity, pottery, machinery, mine, petroleum, dyestuffs, food,grain processing and ect, it is an ideal medium to separate liquid from solid and ideal material to purify and filter gas.