What's the difference between medical masks and industrial masks?
1. Different working environments
Industrial masks are mostly suitable for industrial environment, and medical masks are mostly suitable for hospitals.
2. Different characteristics
Medical masks can not only prevent bacteria and viruses. The main function is to stop liquid splashing. There is no requirement for liquid barrier performance of industrial masks, so this test is not included in the testing standard of industrial masks.
3. Breathing valves are different
The reason why the medical mask has no breathing valve is that microorganisms are not allowed to be directly discharged from the mask, especially during surgery. Therefore, in a sterile environment, never use a mask with a breathing valve.
The exhaled gas in the industrial mask flows slowly with the outside air under the sealed condition. The function of breathing valve is to accelerate air circulation. In particular, it reduces the discomfort of sultry and humid in the sealed environment.
Can medical masks prevent dust?
1. Disposable medical masks can't prevent pm2.5 This mask can effectively filter dust particles larger than 4 microns in diameter and protect blood germs. At present, the main domestic manufacturing standard is YY0469-20 1 1 technical requirements for medical surgical masks;
2. Gauze masks can't protect pm2.5, but can only protect large-diameter particles, which is the worst protective mask among the three types of medical masks. At present, there is no relevant testing standard in China.
3. The medical protective mask can effectively prevent PM2.5, which conforms to GB 19083-20 10 Technical Requirements for Medical Protective Masks, and can effectively filter dust particles and pathogenic microorganisms with diameters less than 0.3 microns.
How long can I wear a medical mask?
Medical masks cannot be reused and need to be replaced after 6-8 hours of use.
Moreover, the two sides of the mask can not be used alternately, because the outer layer of the mask often accumulates a lot of pollutants such as dirt and bacteria in the outside air, while the inner layer blocks exhaled bacteria and saliva. If the two sides are used alternately, some pollutants and other substances from the outer layer will directly attach to the nose and mouth and enter the human body through the respiratory tract, which will affect human health.
How do masks distinguish between the front and the back?
Metal belt distinction
Generally, the colors of medical masks are distinguished by metal strips, which is difficult for people to distinguish. Generally, the metal strip is on the upper side, the protruding side is on the outer side and the opposite side is on the inner side.
Crease discrimination
Divided by creases, the upward side of creases is the inner side, and vice versa.
Thread head difference
The threaded side is the outer side, whereas the unthreaded side is the opposite.
Color discrimination ability
The front and back colors of masks are mostly different, and the outer layers are mostly light blue or dark; The inner layer is mostly white or light.
Fabric difference
From the smoothness point of view, the outward part of the mask is mostly shiny because of its water-blocking function; However, Li Chao chose a material with good air permeability, which is close to the skin and conducive to breathing.