Mask is the most basic protective equipment, it can filter viruses and bacteria, to a certain extent, can avoid the infection of novel coronavirus, go out is to wear a mask. There are many kinds of masks, some are thick and some are thin. Is the thicker the better?
Is the thicker the mask, the better the anti-virus effect？
Mask thickness is not equal to protection. Medical surgical masks feel thin, but the filtering effect is very high. The three layers of water blocking layer, filtering layer and hygroscopic layer effectively prevent the invasion of the virus.
The general cotton masks on the market, though thick, are basically not effective in preventing infectious diseases and are unreliable.
We should pay attention to the mouth cover is not the thicker the better, the higher the density of the material, the better, and the disposable mouth cover can not be disinfected with alcohol, generally 3-4 hours will have to be replaced, a long time not to replace more germs than not wearing masks, because the germs are isolated in the mouth cover outside. At the same time when the hands do not touch the mouth cover outside, be sure to remember!
Some people think that the thicker the mask, the better, which is also wrong. Commonly used masks are usually made of absorbable cotton gauze folded in several layers and sewn together. Some are also made of nonwovens. Generally speaking, masks with three layers of gauze can block 70% ~ 80% of bacteria, and masks with six layers of gauze can block more than 90% of bacteria. In order not to feel suffocated after wearing masks, it is usually appropriate to choose masks with no more than six layers of gauze.
The quality requirement of the medical mouth cover is relatively high, it is composed of mouth cover body and tensification belt, in which mouth cover body can be divided into inner, middle and outer layers, the inner layer is ordinary sanitary gauze or non-woven fabric, the middle layer is ultrafine polypropylene fiber meltblown material layer, and the outer layer is non-woven or ultra-thin polypropylene meltblown material layer. The outer layer has anti-spray design, the middle layer is filtered, the inner layer is hygroscopic, and the mouth cover is made of non-woven fabric.
Masks should be worn in the area of the epidemic, and in places where there are dense public gatherings, even if they are not in the area. But that doesn't mean you have to wear masks at home and anywhere. For example, if you go out to play basketball and there are not many people in the court, you don't have to wear masks. You can save some money because masks are in short supply now. Masks do not need to be changed every time, usually every 4 hours, not every time you wear a change.
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