Newstar aramid fiber can be used in high temperature filter bag in 204℃ for a long time. It can remove PM10, PM2.5 and other harmful particles in the exhaust to the maximum extent. With high filtration accuracy and low shrinkage rate, the capture efficiency of 1 micron particles can reach 98%-99%, which is of great significance to reduce haze, protect public health and promote green development. It is widely used in smelting, cement, asphalt and other high-temperature dust removal equipment as the green shield to protect the blue sky.