Regarding medical masks, several standards can be referred to

First, the standards of all kinds of masks

1. Medical protective mask

Comply with GB19083-2003 “Technical Requirements for Medical Protective Masks”, and the important technical indicators include filtration efficiency of non-oily particles and airflow resistance: (1) Filtration efficiency: under the condition of air flow rate of (85 2) L/min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter of (0.24 0.06) μ m is not lower than 95%, which is in line with N95 (0.06) (2) Suction resistance: Under the above flow conditions, the suction resistance does not exceed 343.2Pa(35mmH2O).

2. Medical surgical masks

It conforms to YY 0469-2004 Technical Requirements for Medical Surgical Masks, and the important technical indexes include filtration efficiency, bacterial filtration efficiency and respiratory resistance: (1) filtration efficiency: under the condition of air flow rate of (30 2) L/min, the filtration efficiency of aerodynamic median diameter (0.24 0.06) μ m sodium chloride aerosol is not lower than 30%(2) bacterial filtration (3) Respiratory resistance: under the condition of filtration efficiency and flow rate, the inspiratory resistance does not exceed 49Pa, and the expiratory resistance does not exceed 29.4Pa.

3. Ordinary medical masks

Comply with the relevant registered product standards (YZB), generally lack the filtration efficiency requirements for particles and bacteria, or the filtration efficiency requirements for particles and bacteria are lower than those for medical surgical masks

Second, the scope of application of medical masks

1. Medical protective masks are suitable for the protection of air-borne respiratory infectious diseases by medical personnel and related staff, with high protection level

2. Medical surgical masks are suitable for the basic protection of medical personnel or related personnel, as well as the protection against the spread of blood, body fluids and splashes during invasive operation

3. General medical use

The protective effect of masks on pathogenic microorganisms is not exact, which can be used for one-time health care in common environment, or for blocking or protecting particles other than pathogenic microorganisms, such as pollen.

Therefore, if we buy a mask, we must choose a professional manufacturer, and the standard specifications can truly achieve the protection purpose we want

There are still many places where masks can’t be bought, and many manufacturers across the country are stepping up production, calling on the whole country to try not to go out during this period of time. Some places have limited purchases of masks, and some are reserved at home. When production is fully rolled out, everyone will be able to purchase masks. Get through the difficulties together, come on!



Post time: Sep-17-2020
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