Safety mask with filter

half-maskadultblue

The medical surgical mask shall meet the technical requirements for medical surgical mask (YY 0469-2011) of the pharmaceutical industry standard of China. (1) Filtration efficiency: under the condition of air flow (30 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with median diameter (0.24 ± 0.06) μ m in aerodynamics is not less than 30%; (2) Bacterial filtration efficiency: under the specified conditions, the filtration efficiency of Staphylococcus aureus atcc6538 is not less than 95%; (3) Pressure difference: under the specified conditions, the pressure difference between the two sides of the mask for gas exchange shall not be greater than 49pa; (4) Synthetic blood penetration: when 2ml synthetic blood is sprayed to the outer side of the mask at a pressure of 16.0kpa (120mmhg), there should be no penetration on the inner side of the mask. Wearing masks correctly is an effective way to block the spread of respiratory secretions. Choosing surgical masks can prevent the spread of respiratory infectious diseases. The wearing method is as follows: (1) Clean your hands before wearing the mask. Avoid touching the inner side of the mask during wearing, so as to reduce the possibility of contamination; (2) When wearing, distinguish the inside and outside, up and down of the mask, the light color side is inside, the dark color side is outside, one end of the metal strip (nose clip) is above the mask, and fully unfold the folded side;