As we all know, with the continuous development of science and technology, the natural environment is getting worse and worse. Haze often occurs in many places, so people will wear masks at this time. But now young people prefer to wear medical masks. How much do you know about the dust-proof principle of medical masks? Let's give a brief introduction to the majority of users.
Under normal circumstances, in order to make the mask play an effective role in protecting the human body, there are certain requirements for the specification of the mask. The mask must be covered on the nose to enable people to breathe freely. Under normal circumstances, the size of the
Medical Mask used by adults is generally 18 * 9, while that used by children is 18 * 9
The medical mask is made of non-woven fabric. This kind of material does not need to be woven and is bonded by some fibers. It is usually made of two-layer mask, three-layer mask and multi-layer activated carbon mask
Medical mask can effectively prevent the fine dust in the air, especially for the respirable dust below 2.5 microns. Because this kind of particle size dust can directly enter the alveoli, it has a great impact on human health. The principle of the medical mask is that when the dust passes through the gauze, the dust will be separated layer by layer, and the dust will be absorbed on the gauze, making it easy to use
Correct wearing of medical mask:
First, cleaning: first, clean hands to avoid dirty hands polluting the inner surface of the mask;
Hanging: the mask is horizontally attached to the face, mouth and nose, and the ropes at both ends are hung on the ears with both hands;
Stretching: as shown in the figure below, both hands pull the folds of the mask up and down at the same time, so that the mask can completely cover the mouth and chin;
Press: finally, press the metal pieces on both sides of the bridge of the nose with the index fingers of both hands to make the upper end of the mask close to the bridge of the nose.
When you wear it, make sure that the white side is facing in and the metal side is facing up. First tie the lower two belts behind the neck, and then tighten them! Extend the bottom of the mask to the base of the chin
Pull up the strap on the upper part of the mask, cover the mouth and nose, and pull the two straps on the upper part behind the ears and on the head to fasten, not on the ears. Press the metal wire at the root of the nose on the mask with the index finger of both hands to make it close to the skin of the nose, and then gradually move the index finger to both sides to make the mask close to the whole
June 01, 2021
