We further elaborate on the following four types of masks:

1. Medical protective masks: implement the national standard GB19083-2010 "Technical Requirements for Medical Protective Masks", which is suitable for filtering particulates in the air and blocking droplets, blood, body fluids, secretions, etc. in a medical working environment.

The filtration efficiency of medical protective masks for non-oily particles should be ≥95%.

2. Medical surgical masks: implement the medical industry standard YY 0469-2011 "Medical surgical masks", which is suitable for clinical medical staff to wear during invasive operations.

The bacterial filtration efficiency of medical surgical masks is ≥95%, and the filtration efficiency of non-oily particles is ≥30%.

3. Disposable medical masks: in accordance with the medical industry standard YY/T 0969-2013 "Disposable medical masks", it is a disposable mask suitable for wearing in ordinary medical environments, blocking the oral and nasal cavity exhalation or spraying pollutants.

The bacterial filtration efficiency of the mask is ≥95%, and there is no requirement for the filtration efficiency of particulate matter.

4. Particulate protective masks: implement the national standard GB 2626-2006 "Respiratory protective equipment self-priming filter anti-particulate respirator" (will be replaced by GB2626-2019), suitable for protection of various types of particulate matter, mainly refers to: suspended in the air Solid, liquid, or mixed particulate matter of solid and liquid, such as dust, smoke, mist, and microorganisms.

The filter elements of particulate protective masks are divided into KN and KP according to their filtering performance. KN is only suitable for non-oily particles, and KP is suitable for oily and non-oily particles.

Particulate protective masks are not specified for use occasions.

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