Polyester needle punched felt is a fine fiber dloth with fibers staggered and evenly distributed by non-woven needle punching process.After treatment, the surface is smooth and smooth, and it is not easy to be blocked by dust.This filter material has large porosity, good air permeability, extremely wide range of uses, and strong chemical resistance.It can not only filter normal temperature gas, but also filter corrosive gas containing acid and alkali, and fiter water and oil. , ideal filter material for liquid separation and other fields.