Acrylic needle felt is made of non-woven needle-punching technology, which uses staggered acrylic fibers and has uniform void distribution. The surface of fine fiber cloth is treated by hot rolling and singeing to make the surface smooth and not easily blocked by dust. The material gap is large. It has good gas permeability and strong chemical stability. It can not only filter normal temperature gas, but also filter medium temperature gas (150 °C). It is also an ideal choice for acid-base corrosive gas filter materials.