Electret is the necessary guarantee of the efficiency of the mask filtration. If the proper electret is not used, the static electricity on the melt blown cloth is easy to escape. If the electrode is not applied, the mask may meet the N95 standard when it is newly made, but the filtering efficiency will become very low in a few months.
Electret materials are widely used in the field of high efficiency and low resistance air filter materials. Electret air filter materials require high density of stored charge, long life and high stability. The raw materials used as electrets need excellent dielectric properties, such as high volume resistance and surface resistance, high dielectric breakdown strength, low moisture absorption and air permeability.
Organic Fluorine Electret Powder TPD-53 has a very high electrostatic capacity, the micropores distribution is uniform, it can increase the electrostatic adsorption capacity of PP, and it can effectively extend the aging of charge storage for one year, it is suitable for the production of melt blown cloth with filtering efficiency of 95 or 99.