The sintered polytetrafluoroethylene (PTFE) filter cartridge is produced through a series of processes, including high-temperature pressing, based on pure PTFE raw materials. This product exhibits strong acid and alkali resistance, as well as high alkali resistance, resulting in a longer service life compared to filter cartridges made of other materials. Furthermore, after numerous improvements in the manufacturing process, the strength and toughness of this product have been further enhanced, significantly improving its resistance to compression and impact, while also facilitating transportation.