Polyester mesh is the target wire mesh group of differential mesh supported by sieve plate before material simplification of extruder. Its function is to filter melt material flow and increase material flow resistance, thereby filtering machine impurities and improving mixing or plasticizing results. It has acid resistance, alkali resistance, temperature resistance, abrasion resistance and other properties, and is mainly used in mining, kerosene, chemical industry, food, medicine, machine manufacturing and other industries. The filter is divided into textile fiber filter and hardware. Machines that place filters become filters to filter natural water and food. Uses: 1. Screening and filtering under acid and alkali conditions, kerosene industry as slurry screen, chemical fiber industry, screening screen, electroplating industry as acid washing screen; 2. Used in mining, kerosene, chemical industry, food, medicine, machine manufacturing and other industries. 3. Used for air conditioning, purifier, lampblack extractor, atmosphere filter, dehumidifier, and dust collector, etc. Used for different requirements of filtration, dust removal and dispersion.