Do you know what standards and technical indicators medical mask need to meet?

1.Medical protective mask
In accordance with GB19083-2003 "Technical Requirements for Medical Protective Masks", important technical indicators include non-oily particle filtration efficiency and airflow resistance:
(1) Filtration efficiency: Under the condition of air flow rate (85 ± 2) L / min, the filtration efficiency for aerodynamic median diameter (0.24 ± 0.06) μm sodium chloride aerosol is not less than 95%, which is in line with N95 (Or FFP2) and above.
(2) Inspiratory resistance: Under the above flow conditions, the inspiratory resistance does not exceed 343.2Pa (35mmH2O).

2, Medical Surgical Mask
Complies with YY 0469-2004 "Technical Requirements for Medical Surgical Masks" standards. Important technical indicators include filtration efficiency, bacterial filtration efficiency and respiratory resistance:
(1) Filtration efficiency: Under the condition of air flow rate (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 S. aureus aerosol with an average particle diameter of (3 ± 0.3) μm is not less than 95%;
(3) Breathing resistance: under the condition of filtration efficiency flow, the inhalation resistance does not exceed 49Pa, and the exhalation resistance does not exceed 29.4Pa.

3. Ordinary disposable Medical Mask
It meets the relevant registered product standards (YZB), and generally lacks the filtration efficiency requirements for particles and bacteria, or the filtration efficiency requirements for particles and bacteria are lower than medical surgical mask and medical protective mask.