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Classification standard of mask protection level

by:Copper Plus     2021-06-11
The classification standard of mask protection grade provides three-layer, four-layer and five-layer mask. Now, in Shanghai, a three-layer mask is usually sufficient. The outermost layer is a non-woven fabric to prevent dust from entering. The middle layer is called a meltblown material, which is processed by a high voltage of 100,000 volts to form very fine fluff, which is used to generate electrostatic adsorption particles. The innermost layer is a non-woven fabric that does not damage the skin, which is more comfortable to the skin and less susceptible to allergies. What is N95? Why wear high protective masks? Judging from the current situation, the new coronavirus is spread through droplets. N95 means it can filter 95 particles in the air. At present, there are many kinds of masks on the market, including industrial masks, medical masks, children's masks, etc. Regardless of the type of mask, at least N90 or higher can effectively protect against viruses. In other words, if you cannot buy N95 masks, you can also buy N90, as long as you are not in the affected area. What mask should I use on the affected area? If you are in an epidemic area, you should use a medical-grade N95 copper mask. In addition to isolating drops, the mask should also have a certain antibacterial effect. In addition, it is best to use a goblet copper mask. Masks with unsealed sides are not safe in endemic areas. If you are not in the affected area, you do not need to wear a medical mask. For example, it can also replace industrial masks higher than N90. Basically you can buy it, as long as it meets the standards, even if you wear a cartoon bear mask. Are national brand masks reliable? In fact, in 3M, Honeywell and other well-known foreign masks, most of the products sold in China are produced by domestic OEMs, which means that there is no problem with domestic production technology. The rest are brands. Currently, there are not many private-brand mask manufacturers in Shanghai, but the company I visited on the 23rd is one of them. In addition, an anti-aging test is required to simulate whether the mask can maintain its effectiveness after being placed in the aging box for 3 or 5 years, and only when the attenuation reaches the standard can it be shipped. In addition, the household copper mask standard is KN, and the American standard is N. The two are basically the same. If there is no standard N mask, the KN standard can also be used. How long can the mask be worn? For example, if there is no epidemic, industrial masks can be used for 3 days, but in view of the current situation, we will follow the doctor’s recommendation to replace them within 4 hours. Usually, if you want to go out for a long time. When time comes to crowded places, 2 masks are prepared almost every day. Why can't the mask be reused? When the internal molten spray material encounters exhaled moisture, the static electricity will disappear after a period of time, which greatly reduces the effect of wearing a mask. Many people take off their masks, put them in their pockets, and then take them off and use them after a while, which doesn't work. It is best not to take it off casually, but to change it when it is taken off. Especially during epidemics, it is very important to maintain good hygiene habits. What if I can't buy a mask? There is really no way, please wait a few years, if you are really worried, please try not to go out. The person in charge of the mask factory told me that at present, the factory has organized employees to stop working overtime during the Spring Festival holiday, but the problem is that only this is the raw material reserve, and they must do so. Wait for the supplier to be out of stock before shipping. Most raw material suppliers are now on vacation, and the restoration of supply will have to wait until at least the eighth day of the year. Therefore, during the Spring Festival, minimize unnecessary travel and stay at home with peace of mind. After the Spring Festival, when the national mask production capacity increases, the shortage will be alleviated. Finally, I hope everyone can take care of their health. A peaceful and peaceful New Year is more important than anything else. They must remain vigilant, do not panic, and take all possible measures. I believe that we will be able to overcome this epidemic and survive this crisis safely.
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