In the field of bag dust removal, the bag is usually compared to the heart of the equipment. The dust-containing gas that the bag dust collector can handle mainly depends on the conditions of the chemical fiber used to make the bag. Under normal temperature conditions, the bag only needs to be able to withstand a temperature of 130°C. Under such working conditions, the filter material based on polyester room temperature (needle felt, 729, 208, acrylic fiber) can basically adapt to its occasions. For industries with relatively high flue gas temperatures, chemical fibers that can withstand high temperatures are required to make filter materials, which can fully meet the high temperature working conditions of 150-250°C. Because Metas fiber belongs to aromatic polyamide fiber, it has good heat resistance, wear resistance, and folding resistance, and its folding resistance cannot be replaced by glass fiber.