Polyester needle punched felt is a fine fiber cloth produced using non-woven needle punching technology with fibers arranged in a staggered manner and evenly distributed gaps. The surface of the needle punched felt produced from polyester short fibers and polyester cotton yarn is treated by hot rolling, singeing, or coating to make it smooth and not easily blocked by dust. The filter material has a high porosity and good breathability, making it widely used with strong chemical stability.Not only can it filter ambient temperature gases, but it can also filter corrosive gases containing acid and alkali, and can filter water and oil. It is an ideal filtering material for ambient temperature conditions, gas separation, liquid-solid separation, and other fields.