The new long-term filtration technology is designed for the latest filtration standards of CCM (cumulative purification capacity). CCM (Cumulated Clean Mass) is an important indicator besides CADR value. When the filter efficiency of the air purifier filter changes from a new state to 50%, the total weight of the pollutants purified during this period is accumulated in milligrams (mg). It represents the continuous purification capacity of the air purifier. The higher the value, the higher the pollutant carrying capacity of the filter and the longer the service life. The filter adopts extremely fine filter fiber, combined with the BMF micro-woven meltblown process, which greatly increases the weaving amount and surface area of the filter fiber, which not only maintains the excellent perforamance of 3M electrostatic filter: high CADR, high cycle efficiency, low pressure resistance characteristics, it double the cumulative purification capacity and service life of the filter.