How to distinguish various masks

What is the meaning of the alphanumeric on the mask?

Letters represent different national standards. The N series of masks are American standards, KN series are Chinese standards, FFP series are European standards, and KF series are Korean standards. The numbers in the back refer to the protection capability, the greater the protection level, the higher the protection level. 95 refers to the ability to filter out more than 95% of non-oily particles. The 90 series is not as high as 95, but it can also resist more than 90% of particles. In the FFP series, 2 basically corresponds to 95, and 3 means that the filtering efficiency is higher, up to 99%. A V at the end of the number indicates that there is a breathing valve.

If you sort the filtering capabilities, it can be simply understood as:

FFP3 0010010 gt; FFP2 = N95 = KN95 = KF94 0010010 gt; KN90.



What is the difference between medical and non-medical masks?

Recently, people often hear the concept of 0010010 quot;medical masks 0010010 quot;, so what is the difference between medical and non-medical masks? N95, KN95 and other masks include medical and non-medical types. Among them, masks with 0010010 quot;medical 0010010 quot; marks in the masks can be used as first-line protection during the anti-epidemic period for medical staff. Masks without 0010010 quot;medical 0010010 quot; marks are not recommended for medical personnel, and ordinary people can use them.

The main difference between the two is that the outer surface of the medical mask is hydrophobically treated, that is, blood and sweat cannot penetrate. Without this waterproof layer, frontline medical staff have a double risk. First, the mask is easy to get wet. After the water molecules become liquid, the attraction between the molecules increases, which is equivalent to breaking through the mask barrier, and the virus can easily enter. . The second is that medical personnel are easily exposed to the blood and body fluid environment of patients with a high probability.

Can a mask with an exhalation valve be used for protection?

Regarding whether it is necessary to bring a breathing valve, Dong Peng said that the exhalation valve of the mask is a one-way valve. Ordinary healthy people can wear masks with exhalation valves to prevent the inhalation of virus-containing droplets. Infected persons, suspected infected persons and close contacts during the incubation period should not be used, otherwise it will become a source of infection for walking, and the opened exhalation valve may expel the patient 0010010 #39;s virus-containing droplets. Therefore, in the first-line ward, try not to choose a breathing valve, because the one-way valve protects itself from others, and the people in the ward and masks are also high-risk groups, so try not to use the breathing valve to avoid affecting others.

To prevent pneumonia, be sure to remember the wearing method and principles

No matter how good the mask is, wearing it wrong is useless. Therefore, scientific and reasonable wearing and standardized use can help us to protect effectively.

1. It is not necessary to wear masks in the open and ventilated areas of non-epidemic areas, and masks are required to enter crowded or closed public places.

2. It is recommended to wear disposable medical masks in open and ventilated areas where the epidemic situation is high; to enter medically dense or closed public places to wear medical surgical masks or particulate protective masks.

3. When you have a suspected symptom to the hospital, you need to wear a particulate protective mask or a medical protective mask without an exhalation valve.

4. Cotton yarn masks, sponge masks and activated carbon masks have no protection against viral infections.

5. The masks worn by healthy people are generally replaced when the masks are deformed, wetted or soiled, resulting in a decrease in protection performance, and can be disposed of in accordance with the requirements of domestic waste classification.

6. The masks worn by suspected cases or diagnosed patients should not be discarded at will, and should be treated as medical waste. They should be treated strictly in accordance with the relevant procedures of medical waste and should not enter the circulation market.

7. In public places, keep a distance of more than 1 meter away from others; tissues and sleeves should be used to cover the nose and mouth when coughing or sneezing.