Do COVID-19 masks need to have breathing valves?

2021/03/04


Is the thicker the mask the better?

       The filter performance of the mask is mainly determined by the filter material in the middle layer. The currently commonly used filter material is a meltblown non-woven fabric made of polypropylene ultrafine fibers. It is light and thin, has good air permeability, and can efficiently filter the air in the air. particulates. The thicker the filter material is, the better. Meltblown non-woven fabrics produced by different manufacturers vary greatly in performance, and the specific performance needs to be measured by professional equipment. Masks can only have good filtration efficiency if they contain this filter material. If they are only ordinary needle-punched non-woven fabrics and spunlace non-woven fabrics, without melt-blown non-woven fabrics, good filtration effects cannot be achieved.


 

Do I have to buy masks with the highest protection level?

       When wearing medical masks, you should choose the appropriate level type according to the type of pollutant transmission and risk, not too high or too low. Although the protective effect of medical protective masks with high protection level is better, due to the high level of filter material, good adhesion, and higher respiratory resistance, long-term wearing will increase the burden of breathing and cause discomfort such as breathing difficulties. At the same time, the air permeability is The moisture absorption is also worse, which means worse comfort performance.




Should COVID-19 masks have breathing valves?

       To prevent this COVID-19, it is not recommended to use a mask with a vent valve because it may allow the virus to gather locally. It is recommended to wear an N95 mask5mm  nose bridge wire without breathing valve.