What are the types of common face masks?

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Common face masks are as follows: ordinary cotton masks, disposable masks (such as: medical surgical masks), N95 masks

Disposable masks (Disposable Surgical Face Mask)

It can prevent respiratory infection to a certain extent, but it cannot prevent haze. Medical surgical masks have three layers, from the outside to the inside are the waterproof layer, filter layer, and comfort layer. The comfort layer is a layer of non-woven fabric. When wearing it, the white non-woven fabric faces inward, the blue waterproof layer faces outward, and the side with the metal sheet faces up. Fit the nose and smooth the cheeks so that there is as little gap as possible between the mask and the face. Pay attention when purchasing, you should choose a mask with the words "Medical Surgical Mask" clearly marked on the outer packaging.

N95 mask (Protective Face Mask)

It can effectively prevent respiratory tract infection and prevent haze.

The N95 mask is one of the nine anti-particulate masks certified by NIOSH (National Institute for Occupational Safety and Health). "N" means that it is not suitable for oily particles (the oily particles produced by cooking are oily particles, and the droplets produced by people talking or coughing are not oily); "95" means that under the detection conditions specified in the NIOSH standard The efficiency reaches 95%.

N95 is not a specific product name. As long as it meets the N95 standard and has passed the NIOSH review, it can be called "N95 mask".

  The biggest feature of the N95 mask is that it can prevent droplet infection caused by patient body fluids or blood splashes. The size of the droplets is 1 to 5 microns in diameter. The U.S. Occupational Safety and Health Administration (OSHA) stipulates for medical institutions that medical personnel exposed to tuberculosis bacteria must wear masks above the N95 standard.

Compared with medical surgical masks, N95 masks are better airtight. When choosing N95 masks, try to choose N95 masks without breathing valves.

Ordinary cotton mask

Its material may be cotton cloth, gauze, wool, canvas and velvet, etc., because the material itself is not dense enough to prevent infection.

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