Fluoromex needle felt is a new type of high-temperature and high-efficiency filter material with reasonable structure and excellent performance. It not only has the excellent features of glass fiber woven filter material, such as high temperature resistance, acid and alkali corrosion resistance, dimensional stability and high strength, but also uses 100% alkali-free glass fiber as raw material, adopts high-count glass fiber filaments, and is needle-punched into fleece. It has good heat resistance, flame retardancy and anti-corrosion effects, small gas filtration resistance, dust removal efficiency exceeding woven filter material, and filtration speed is about twice that of woven filter material. It is the preferred product for purifying blast furnace gas and flue gas in the steel, smelting and other industries.