NOMEX fiber (aramid 1313) has excellent high temperature resistance, flame retardancy, good spinnability and dimensional stability, and good mechanical properties. It is made into filter bags in the industry and can withstand a temperature of 200 ℃ for a long time. The temperature resistance is 240℃, the alkali resistance is strong, the acid resistance is medium, and it is a good material for high temperature gas at 180-220℃. It is widely used in the high temperature flue gas dust removal project of the steel and cement rotary kiln head and kiln tail.