Comparing to N95 masks, what about other masks like disposable medical care mask?

The cover of disposable medical care mask is also divided into three layers: inner, middle and outer. The inner layer is ordinary sanitary gauze or non-woven fabric, generally white, the middle layer is ultra-fine polypropylene fiber meltblown material layer, and the outer layer is non-woven Fabric or ultra-thin polypropylene meltblown material layer, generally light blue. Also be careful not to wear it backwards. This high-efficiency medical protective mask has strong hydrophobic and air permeability, has a significant filtering effect on small virus-carrying aerosols or harmful dust, and has a good overall filtering effect. The materials used are non-toxic and harmless and comfortable to wear. The filtration efficiency for fine dust particles is not less than 95%. There are also certain standards in terms of size: the size of the central part of the rectangular mask after unfolding: the length is not less than 17cm and the width is not less than 17cm; the size of the closed arched mask: the transverse diameter is not less than 14cm, and the longitudinal diameter is not less than 14cm. Medical protective masks cannot have vent valves.

There is also a common medical mask, which has the lowest level of protection and meets the relevant product standards. It can only block the splatter exhaled from the nasal cavity and oral cavity. It can be used for disposable sanitary care in general medical environments or general ward sanitary care activities. , Such as sanitation, liquid preparation, cleaning bed units, etc., or barrier or protection of particles other than pathogenic microorganisms such as pollen. The filtration efficiency of particles and bacteria does not meet the standards of medical surgical masks and medical protective masks. For aerosols with a diameter of 0.3μm, only 20.0%-25.0% of the protection effect is achieved, and the filtration efficiency for particles and bacteria cannot reach the current level. The required requirements cannot effectively prevent pathogens from invading through the respiratory tract, cannot be used in clinically invasive operations, nor can they protect particles and bacteria and viruses, and are limited to a certain mechanical barrier to dust particles or aerosols.