A movie that reveals the secret of the N95 mask, such as 'What is the 95 of the N95 mask?' That blocks the new coronavirus
Since the outbreak of the new coronavirus infection (COVID-19), masks have
The Astounding Physics of N95 Masks-YouTube
Before the spread of the new coronavirus in 2020, only people who knew about N95 masks were in the dust-producing or going to the fire scene.
People tend to think of N95 masks as something like a very fine-grained strainer, but in reality there are differences.
A strainer scrapes particles of a certain size and passes particles smaller than that.
The N95 mask, on the other hand, is good at capturing large and small particles, but does not block medium-sized particles very well.
This is the difference between the N95 mask and the strainer.
The main purpose of the N95 mask is not to catch particles with a mesh ...
It is to attach particles to the fibers. The particles once attached to the fiber are fixed to the fiber as they are, and do not wander in the air again.
In the microscopic world, basically every object is a sticky substance because the influence of
In other words, the N95 mask is not a screen door that small insects can pass through, but a spider web that catches any insects.
No matter how many times you use the same mesh strainer, you will not be able to catch small particles ...
With an N95 mask with multiple layers of fibers, there is a high probability that particles will come into contact with the fibers.
Whether the particles come into contact with the fibers depends on the size of the particles. Large particles move linearly and almost certainly collide with the fibers. This is called an
Also, small particles collide with air molecules and move in a zigzag pattern, so there is a very high probability that they will collide with fibers. This zigzag movement is known as
Medium-sized particles, on the other hand, move along the flow of air and do not travel straight or zigzag. Therefore, there is a risk of slipping through the fibers.
However, the N95 mask has an inner hand called '
Cats can also generate static electricity and cover their fur with Styrofoam, but the N95 mask uses a slightly different principle.
When iron is placed in a strong magnetic field, it becomes permanently magnetic, but similarly, plastics continue to generate an electric field due to the
The N95 mask applies this mechanism and is able to capture 10 times more particles than plain fibers.
The functions of the N95 mask can be summarized as 'adhesiveness at the molecular level', 'layers of fibers', and 'electric field that captures all particles'.
The N95 mask captures almost 100% of small and large particles. On the other hand, the capture rate of medium particles is 95%, so it is named '95'.
The N95 mask blocks 95% of even medium particles that you don't like, but there are a few things you need to know before using it.
The first is that 'if you don't wear it properly, it won't work.'
The second point is that 'the size of bacteria and viruses does not really matter.' This is because these pathogens usually do not float in the air on their own, but on droplets of various sizes that occur during breathing or sneezing.
The third is that it is 'basically disposable'. Due to the growing global demand for N95 masks, the reality is that many healthcare professionals are cleaning and reusing masks. However, some cleaning methods damage the electrostatic properties of the mask, so even if it looks the same, it can be significantly degraded.
'Soap water,' 'alcohol disinfectant,' and 'bleach' may impair the function of the N95 mask, and the new coronavirus (SARS-CoV-2) has been shown to remain active for more than 3 days. , 'Do not use overnight' is also not effective.
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