Disposable masks usually take 6-8 hours. After this time, it needs to be replaced. It should be reminded that the double sides of the mask cannot be used interchangeably. Many people ask why, because the outer layer of the mask accumulates a lot of dust, bacteria and other grime in the air outside, hindering the user's breathing. If the two sides are used alternately, the dust on the outer layer will enter the respiratory tract and affect human health. The protection level of general medical masks is low. From the perspective of production specifications, such masks generally lack the filtration efficiency requirements for particles and bacteria. Therefore, general medical masks are only suitable for blocking saliva exhaled from the oral cavity and nasal cavity. Medical surgical masks with a medium protection level can block most bacteria and some viruses, which can not only prevent people from being infected, but also prevent people from exhaling gas with some. bacteria. Respiratory protection can only reduce the risk of illness, but not eliminate it completely. We should know that prevention and treatment are sometimes two different things, and risk reduction and elimination are two different things. Even medical protective masks cannot completely isolate pathogens. Medical Disposable Mask manufacturers are mainly divided into medical general masks, medical surgical masks and medical protective masks according to their protective power and scope of application. The correct way to wear a disposable mask: it is generally divided into three layers, and the outer and inner layers are non-woven fabrics. These two layers play the role of blocking pollutants and supporting the disposable sterile mask itself. The two colors are different. The main reason is that the outer layer is more resistant to dirt and comes in black or blue. It is important that the filter layer in the center of the disposable mask is made of filter cloth. The fiber density is high and the pores are small, which can block fine contaminants. Also, note that one end of the metal strip is the top of the mask. Don't turn it upside down. The central layer melt-blown non-woven fabric is the most important non-woven fabric in medical surgical masks. Melt-blown nonwovens block viruses and bacteria through the insulating effect and electrostatic adsorption effect of the fibers. The fiber isolation and electrostatic adsorption effects of meltblown nonwovens have a certain fullness. Once it reaches a certain level, it no longer has the effect of absorbing pathogens. Therefore, if the surgical mask is used continuously for 4 hours, it generally needs to be replaced. Medical mask headbands are two long belts that pass through the holes on both sides of the mask. The nose clip is located in the upper center of the filter layer and is placed between the precision layer and the dense layer. Information is a metal or metal-plastic composite that has both plasticity and a certain strength. The disposable mask is easy to seal the nose when worn in the factory. It must be produced according to the requirements, so that the bacterial filtration capacity can reach more than 95%, which is an important effect of medical masks. Let's classify commonly used masks. There are three types of non-woven masks, and each style is used in different places. Under normal circumstances, double-layer masks are mainly used in food processing plants. There is no filter meltblown fabric in the center, but two nonwoven fabrics are sewn together. Its effect is to prevent saliva, snot, colds and other substances in the mouth from entering the food, and the gram weight is about 45 grams.
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