Scientific common sense about masks（1）1. What kind of particulate protective mask (sometimes called disposable mask) can be used to help protect against viruses?The World Health Organization (WHO) and my country's medical management agencies recommend that, in some cases, use N95 approved by NIOSH,
The birth and development history of masksIn recent times, due to the epidemic, masks have become a must-have item that various countries are vying to buy, which has made a common daily item a hot commodity. In order to meet the demand for masks, many companies in my country have begun to transform
Mask selection method and fabric introduction（2）For the filter material of a good protective mask, the following three conditions should be met. One is that the filter efficiency is high when the mask is in good contact with the user's face, the other is low breathing resistance, and the third is th
Mask selection method and fabric introduction（1）1. Dust blocking efficiencyThe dust blocking efficiency of the mask is based on its blocking efficiency for fine dust, especially for respirable dust below 2.5 microns. Because dust of this particle size can directly enter the alveoli, it has the great
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