The characteristics of glass fiber filter cloth are high mechanical strength, and the breaking strength is generally above 1300N; The elongation is low, and the breaking elongation of glass sewing is only 3; The size of that prepare filter bag is stable; Good temperature resistance, can be used for a long time below 260; Good corrosion resistance, can be used in acid and alkali gas; Glass fiber filter cloth has smooth surface, good air permeability and poor torture resistance.