Polyester filter belt is mainly used for sludge dehydration, pulp and juice squeeze, mine smelting, mine tailings drying and other pressure filtration industries. They have the characteristics of good water permeability, air permeability and non-revealed sludge, acid-resistance and alkali-resistance. Because of their designing structure, the sludge can be peeled off easily after filtering, so the belt are easily cleaned and have long working time.