The disposable medical surgery mask are generally used for medical surgery in hospitals. But because of the outbreak of the coronavirus, now all over the world are in lack of the medical mask for resist the virus, in order to protect people to get away with the virus. The disposable medical surgery mask is non-woven mask with 90% anti-virus with CE and PDA certificate.
The disposable medical surgery mask complies with the YY0469-2004 "Technical Requirements for Medical Surgical Masks" standard. Important technical indicators include filtration efficiency, bacterial filtration efficiency and respiratory resistance. The specific indicators are as follows:
1) Filtration efficiency: Under the condition of air flow (30 ± 2) L / min, the filtration efficiency for aerodynamic median diameter (0.24 ± 0.06) μm sodium chloride aerosol is not less than 30%.
2) Bacterial filtration efficiency: Under specified conditions, the filtration efficiency of Staphylococcus aureus aerosols with an average particle diameter of (3 ± 0.3) μm is not less than 95%; the filtration rate of bacteria should be ≥95%; The filtration rate should be ≥30%.
3) Breathing resistance: In the condition of filtering efficiency and flow rate, the inhalation resistance does not exceed 49Pa, and the exhalation resistance does not exceed 29.4Pa. When the pressure difference △ P for gas exchange on both sides of the mask is 49Pa / cm, the gas flow rate should be ≥264mm / s.
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