
The ideal mask should have a loading and filtering efficiency of more than 98%, and the wearing resistance is within 60Pa .It should feature a core filter material that doesn't stick to the face and skin-friendly materials.The mask should have a large breathing space (with a dead airspace less than 1%) and a wide airflow exchange area.The design should be adjustable to meet the needs of most people rather than just fitting specific facial measurements.
The wearing time, number of times of use
The wearing time of protective masks should be determined by the wearer. When the mask structure collapses, breaks, or the internal contaminated particles are encountered during wearing, and the breathing resistance increases, it should be considered that it needs to be replaced. This time is not fixed. Or when the use environment is polluted by ordinary particles, there is no such problems as structural collapse, breakage, internal contaminated particles, and increased breathing resistance. The protective mask can be dried or quickly air-dried before continuing to use. This is called cumulative disposable use. It is recommended that the cumulative wearing time should not exceed 30 hours (about 3-4 days). Because everyone's use environment, usage method, and disinfection method are different.”
The wearer needs to decide when to replace it in the end; the increase in breathing resistance is considered to be the replacement point of a mask life, which means that the internal filter material is blocked by particles/water vapor, which causes the resistance to increase, which will affect the wearer's breathing. If the protective mask is used in a virus aerosol particle environment, it is recommended to wear the mask and take off the mask as a cycle, and one mask for one cycle. Viruses and bacteria are also a type of particle. In addition, if the mask is worn for a long time, the surface layer is too dirty or the internal filter material begins to turn gray and black, it is also recommended to replace it. However, when going to hospitals or high-risk environments, use KN95 or medical protective masks as disposable.
Disinfection method
The mask can be disinfected by standing, hypochlorous acid, ultraviolet light, ozone and other disinfection methods, and then reused. The specific number of uses depends on the individual.
