This kind of polyester mesh 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 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 in the high ventilation part of the dryness part of paper-making machine