Polyamide Fabrics Series, which made of polyamide fiber (PA),can be divided into PA long thread fabrics and monofilement fabrics .These produsts possess the propertied of weak acid-resistance , alkali-resistance,high mightiness, melting point of 215-250℃, and operating temperature is better. They are mainly used in the industries of chemical, coal mining, buliding materials, melting. For equipments in the strong alkali operating conditions, such as frame filter presses , disc filters, and centrifuge filters. The filtering precision can reach less than 5 microns.