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The outer layer of the mask often accumulates a lot of dirt, bacteria and other dirt in the outside air, and the inner layer blocks the exhaled bacteria and saliva, so that the two sides can not be used alternately, otherwise the contaminated dirt will be directly Face when inhaled the body, and become a source of infection. When the mask is not worn, it should be folded into a clean envelope, and will be close to the nose and mouth side of the fold, do not just stuffed into the pocket or hanging in the neck.If the mask is exhaled hot air or saliva wet, the role of blocking the bacteria will b...
发布时间: 2017 - 07 - 06
浏览次数:7
From the human physiological structure, because the human nasal mucosal blood circulation is very strong, the nasal cavity is very tortuous, nose hair from a filter "barrier." When the air inhales the nostrils, the air flow in the meandering channel to form a vortex, so that the air flow into the nasal cavity to get warm. Some people have shown that air is heated to 28.8 ° C when the cold air at minus 7 ° C is sucked into the lungs through the nasal cavity, which is very close to the temperature of the human body. If you wear a long mask, will make the nasal mucosa become f...
发布时间: 2017 - 07 - 06
浏览次数:8
First, the use of general masksMasks must be sized and worn, and the mask must be effective. The masks sold on the market are generally divided into rectangular and cup-shaped. Rectangular masks must have at least three layers of paper in order to have a protective effect. The user should put the wire on the mask on the bridge of the nose, and then along the nose will spread out the whole mask in order to play the effectiveness. Allow the child to wear a rectangular surgical mask, because it does not have a fixed shape, if tied well, can close the child's face. Cup-shaped mask will have to ens...
发布时间: 2017 - 07 - 06
浏览次数:5
The choice of mask has three principles:First, the mask of the dust barrier efficiency. The barrier efficiency of the mask is based on its resistance to fine dust, especially for respiratory dust below 5 microns. Because the diameter of the dust can be directly into the alveolar, the greatest impact on human health. General gauze masks, the principle of its resistance is mechanical filter, that is, when the dust hit the gauze, after - layers of the barrier, some large particles of dust in the sand cloth. However, for some fine dust, especially less than 5 microns of dust, will be from the gauz...
发布时间: 2017 - 07 - 06
浏览次数:9
Cotton masks Advantages: can be used repeatedly cleaning,Disadvantages: the mouth of the mouth part of the nose and mouth will leave the saliva, if not diligent in cleaning, easy to breed bacteria, do not meet the health requirements. Cotton masks are generally very thick fiber, can not effectively filter the smaller particles, and most of the international safety certification, the protection effect is not guaranteed. Gauze masks are almost useless, too much on both sides of the nostrils.N95 masks:Used to avoid wearing people who are infected; can not prevent the patient to spread the virus t...
发布时间: 2017 - 07 - 06
浏览次数:9
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