PM2.5 masks use air filter material technology, 0.25 micron level, can prevent virus intrusion. There is also dust-free granular activated carbon in the mask filter. Because the traditional activated carbon fiber mask is coated with a layer of carbon powder on the filter fiber, there is a part of fine carbon powder particles in the fiber cloth, which is certain for users with lung diseases Impact. And the refined granular activated carbon can not only deeply purify the dust, but also adsorb toxic gases, further improving the safety of the mask.
The most common gauze masks have the worst protection against particulate matter in the air. Ordinary gauze masks are fiber masks, and its flow blocking principle is a mechanical barrier. Through this layer of mechanical blocking, large particles can be blocked, but particles smaller than 5 microns in diameter cannot be blocked.
Medical surgical masks and disposable medical masks can block particles larger than 4 microns in diameter. Tests conducted in a mask tightness laboratory in a hospital environment show that according to general medical standards, for 0.3 micron particles, medical surgical masks penetrate The rate is 18.3%, and the general disposable medical mask is 85.6%, which shows that the medical mask has a limited barrier effect on fine particles.
Medical N95 masks detect 0.3 micron particles, and large particles can be blocked. When tested in a closed mask laboratory, the transmission rate of medical N95 masks is only 0.425%, which can be said to be more than 99% of particulate matter. Are blocked.
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