Common masks include the following types: ordinary cott […]
Common masks include the following types: ordinary cotton masks, disposable masks (such as medical surgical masks, ordinary medical masks), and medical protective masks (N95/KN95 masks).
Among them, medical protective masks (N95/KN95 masks) and medical surgical masks are medical products that have obtained national regulatory management after SARS in 2003, and have the function of blocking the passage of liquid and droplet particles. If worn correctly, it can effectively prevent diseases transmitted by droplets, and is our first choice when buying masks.
N95 is not a specific product name. As long as it meets the N95 standard and passes the NIOSH review, the product can be called "N95 mask".
In China, k95 masks refer to the classification of non-oily particulate masks in China's national standard GB2626-2006. KN category is suitable for filtering non-oily particles. The numerical part is the same in the two countries. 95 refers to the filtration efficiency ≥ 95%.
From the anti-microbial point of view, the best choice is a compliant, non-breathing valve medical protective mask (N95/KN95 mask)
Medical protective masks should comply with China's GB 19083-2010 mandatory standards, with a filtration efficiency of ≥95% (using non-oily particles for testing). It is required to pass the synthetic blood penetration test (to prevent body fluid from splashing), and it is required to meet the microbiological indicators.
Medical surgical masks are commonly used medical masks in operating rooms and other environments where there is a risk of body fluids and blood splashing. They can block blood and body fluids from passing through the mask and contaminate the wearer. At the same time, the filtration efficiency of bacteria is more than 95%.
Viruses are the smallest particles among the particles we can come into contact with daily. PM2.5, which we are familiar with, refers to particles with a particle size of 2.5 microns and below, while the particle size of the virus ranges from 0.02 to 0.3 microns. Is the virus so small, isn't it very dangerous?
This is a common misunderstanding. It is thought that a mask is a sieve, particles smaller than the sieve hole can pass through, and particles larger than the sieve hole are blocked outside. In fact, N95 masks can effectively block large particles and the smallest particles.
Medical protective masks with high protection levels have better protective effects, but due to the high level of filter material, good tightness, and higher respiratory resistance, wearing them for a long time will increase the respiratory burden and cause breathing difficulties and other discomforts.
If it is only for daily use and does not go to hospitals and other places where the risk of pathogen infection is high, you can choose medical surgical masks.
In addition to choosing the right mask, you must also use the right mask. Pay attention to the way of wearing and the time of use. Read the wearing method on the package carefully, and confirm the air tightness after wearing them. If you wear glasses and there is fog on the lenses, it must be that the mask is not worn properly.