Faced with the surge in the total amount of urban domestic waste, China must increasingly consider waste disposal issues in urban construction and development. At present, the more common treatment method is waste incineration combined with waste gas purification measures. At the same time, various localities have also promulgated new environmental regulations to strictly limit excessive emissions.

       Bag dust collectors using needle felt filter bags have been operating successfully for decades. Through this technology, harmful ultrafine dust can be effectively isolated.

       Typical filter media suitable for the waste incineration industry are high-temperature resistant filter media made of fiber polymers, such as PPS, P84 and PTFE. Depending on the different purification methods of exhaust gas, chemical protective treatments such as PTFE fiber impregnation and surface treatment can be applied to the filter material.