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Filter object 5 microns or dust particles and all kinds of suspended matter; Resistance to humidity to 100% RH, long service life, after vacuuming or washing Can be used multiple times, economic and practical; Bulk densities high amount of dust, low resistance and flame retardant characteristics;Last 100 ℃ of heat-resistant, instantaneous heat resistance 120 ℃; Do not contain silicon, resistant to chemical such as chemical solvents, acid smog The influence of material; With high performance, high strength and fracture resistance of polyester fiber, encryption, step by step web produced by hot air;