Polyester Spiral Press Filter Belt: This kind of polyester spiral belt is made of polyester spiral dryer fabric which is filled with stuff to reduce the air permeation and to intensitive the opening, hence to reduce the material loss from the mesh opening. Polyester spiral press filter belt is mainly used in sludge dewatering and desiccation, paper pulp washing, coal washing, chemicals, dehydrati dehydration and other industries. It is better in the high ventilation part of the dryness part of paper-making machine.