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Surgical masks believe we all know, the masks is simple is hospital use, but for it is not just the surface phenomenon, its filtering mechanism, selection of raw material is very exquisite, how can achieve the effect of filtering, how can better ventilation effect, these are what we didn't notice that some of the points, today is to introduce the mechanism of its filtering, learning together.
From the filtration principle analysis, basically has the following five kinds of dust filtering mechanism.
Brownian motion due to the particle size is too small, vulnerable to other gas molecules pounding and cause their trajectory is random Brownian motion, adsorbed on the surface of fiber, and the smaller the particle, the stronger the effect.
Intercept particle size is too big, cannot penetrate fiber gap, then capture directly by the fiber surface, the bigger the particle size of particles of the better the results.
Inertial impact inertia is the continuous nature of the particles themselves movement, if gas and suspended particles at the same rate of filter cloth and filter material, the gas will change the direction of flow with holes in the filter material, the larger particles will be because of inertia causes the flow direction, still maintain the original and the impact on the filter material, to achieve the function of the filter.
The quality and the faster the speed of the particles, the greater the filtering effect is better.
Electrostatic attraction for fiber electrically charged, and induce adsorbed on the surface of fiber, very fine grain size is smaller, the quality of the lighter particles are attracted more easily.
Sedimentation caused by the gravity of the particles themselves directly sedimentation, and is captured by the filter material;
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