This kind of polyester mesh is made of polyester spiral dryer fabric which is filled with stuff to reduce the air permeation and to insensitive the opening, hence to reduce the material loss from the mesh opening. Polyester spiral filter screen is mainly used in sludge desiccation, paper pulp washing, coal washing, chemicals, dehydration of wine bran, vinegar bran dehydration and other industries. It is better used in the high ventilation part of the dryness part of paper-making machine. It is widely used in paper drying, industrial conveyor belt, sludge dewatering, mineral processing, pulp washing, coal washing, chemical, food, printing and dyeing.