Common masks include the following: common cotton masks, Civil protective masks, disposable masks (such as medical-surgical masks), N95 masks.
Civil protective masks
The civilian protective masks are all flat. This mask is one level lower than the disposable medical mask protection. The structure is the same as that of the disposable medical mask, except that the melt-blown cloth used in the middle is a common melt-blown without electret treatment. Cloth, this kind of barrier effect is only droplets. If the fiber is made thinner, it will also have a short-term barrier effect against bacteria, but there is no adsorption force between charges, so it is not suitable for wearing in high-risk places such as hospitals. Of course, adequate protection for ordinary people living at home. Not recommended for use in enclosed and crowded locations.
Often used before the virus
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Disposable masks (medical-surgical masks)
It can prevent respiratory tract infection to a certain extent and cannot prevent haze.
There are three layers of medical surgical masks, which are waterproof layer, filter layer and comfort layer from outside to inside. The comfort layer is a layer of non-woven fabric. When wearing, the white non-woven fabric faces inward, the blue waterproof layer faces outward, and the side with the metal sheet is facing up. Fit your nose and smooth your cheeks so that there is no gap between the mask and your face.
Please pay attention when purchasing, you should choose a mask on the outer package clearly marked “Medical-Surgical Mask”.
N95 mask
It can effectively prevent respiratory infections, can prevent haze.
The N95 mask is one of nine anti-particulate masks certified by NIOSH. “N” means unsuitable for oily particles (oil fume produced by cooking is oily particles, and droplets produced by people speaking or coughing are not oily); “95” means filtering under the detection conditions specified by the NIOSH standard The efficiency reaches 95%.
N95 is not a specific product name. As long as the product meets the N95 standard and passes the NIOSH review, it can be called an “N95 mask”.
The biggest feature of the type mask is that it can prevent droplet infection caused by the patient’s body fluid or blood splash. The size of the droplets is 1 to 5 microns in diameter.
The U.S. Occupational Safety and Health Administration (OSHA) requires medical institutions that medical workers exposed to tuberculosis bacteria must wear masks higher than N95.
Compared with medical surgical masks, N95 masks are better closed. When choosing an N95 mask, try to choose an N95 mask without a breathing valve. Because the patient wears a mask with a breathing valve, it is equivalent to directly transmitting the germs to the surrounding people, without blocking the germs of the patients.
After reading this, we believe that everyone has an understanding of the difference between disposable medical masks and N95 masks.
N95 is not a brand, it is a mask model. N95 is based on the American standard, which divides professional protective masks into three types and nine types.
Best masks in the virus
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Ordinary cotton face mask
Its material may be cotton, gauze, wool, canvas, and velvet. Because the material itself is not dense enough, it cannot serve the purpose of preventing infection.
