1. High dirt holding capacity, high filtering accuracy, slowly rising of pressure, longer changes cycle.
2. Corrosion resistance of nitric acid, alkali and organic solvent and medicine. It can be used for a long period of service in the temperature of 600¡æ.
3. High porosity and excellent permeability which results in low pressure drop and large flow.
4. Pleatable, provide a large filter area per unit of volume, and it can be welded and machined.
5. Cleanable, can be used several times.