Original title: Detailed explanation of the most complete epidemic prevention masks! N95 has nearly 10 categories? How to choose and buy? Read it and you'll understand! With the attack of COVID-19, masks have become an indispensable "umbrella" for everyone. When it comes to choosing a mask, now everyone has been able to say: ordinary cotton masks simply can not block the virus, must buy a medical mask, or N95 mask. Currently in Canada, especially in Greater Vancouver, there is such a phenomenon: medical masks are in such short supply that they can hardly be bought in stock, but they can still be bought N95 mask, but the price is extremely expensive. Canadian Tire's most expensive N95 mask sells for 7.99 Canadian yuan each! Moreover, besides N95, we also found KN95, R95, P95 masks.. Confused! But in order to have a mask to wear, no matter what model it is, no matter how expensive it is, buy it. Think rationally: Do we really need these models? What does each signal mean? What is the main protection? What's the difference? So, let's introduce these masks one by one. N95 mask: Similar to the effect of medical mask N95 mask refers to respirators that meet the National Institute for Occupational Safety and Health's air filtration "N95" rating. As the name implies, N95 means a mask that can block 95% of non-oily particles with a diameter of more than 0.3 microns. Expand the full text Although N95 mask play a role in the prevention of new pneumonia and SARS, the real use of N95 is to prevent air pollution, such as haze, mountain fires and so on. N95 mask can play a decisive role in the Australian fire some time ago. A study published by the Pittsburgh Center for Disease Control and Prevention in the United States says very accurately: In the new pneumonia and influenza,Medical Quickly Delivery Antivirus Coverall, the performance of N95 mask is almost the same as that of ordinary medical masks! But N95 mask are several times more expensive than medical masks, so it's a good explanation why medical masks are selling out quickly while N95 masks are still in stock. KN95 mask: No difference from N95 mask What is the difference between KN95 mask and N95 mask? KN95 is actually a Chinese standard, which means "self-priming filter respiratory protective equipment for protecting all kinds of particulate matter". Since it is also "95", the filtration efficiency of KN95 is also about 95%. In fact, KN95 and N95 are basically the same, but the name and the country are different. In terms of fighting against COVID-19, ordinary medical protective masks can also filter 95%, but it is more difficult to fight against serious air pollution caused by haze and mountain fires. Must say N95,Medical Full Body Coverall, KN95 compared to the advantages of medical masks, that is, N95, KN95 sealing is stronger: medical masks can not completely prevent air from entering from the edge of the gap, but N95 mask can. Of course, there are advantages and disadvantages: people with chronic respiratory diseases, rhinitis, heart disease or other dyspnea, N95 mask, especially N95 mask without breathing valves, will have great hidden dangers. R95 respirator: more oil resistant N95 mask. R95 English explanation is: Somewhat resistant to oil, is a more oil resistant N95 mask. The protection level is the same, the new pneumonia virus has nothing to do with oil, so R95 is actually no different from N95, the price will be higher, KN95 Mask for Epidemic Prevention and Control ,Medical Disposable Coverall, there is no need to buy. P95 respirator: N95 mask with strong oil resistance. The oil resistance of R95 is acceptable, while P95 is "Strong resistant to oil". If there's one reason to buy the P95, it's the very long life: over 40 hours! Normal N95 and R95 are generally within 10 hours. N95, called differently in other countries If you are in Europe, Australia or Japan now, you can't buy N95 mask-not really, but the name is different. N95 mask, called FFP2 mask in Europe, has a filtering efficiency of 94%, which is close to N95; In Japan, they are called DS2 or RS2 masks, which have the same filtration efficiency as N95. In Australia, they are called P2 masks, which have the same 95% filtration efficiency. In China, as mentioned earlier, the name is KN95. Whether KN95, P2, DS2 or RS2, they can only filter non-oily particles, but FFP2 in the European Union can filter oily particles, and the effect is close to R95. N95 mask have different models of their own. N95 mask themselves, but also subdivided into several different models, there are still some differences, you can pay attention to when choosing and purchasing. Take the famous brand 3m N95 mask as an example, it can be divided into the following categories: N95/8210: The most common N95 model, which reduces respiratory resistance but does not have a breathing valve; N95/8210V: N95 mask with cool flow breather valve, better comfort, but the price will be more expensive; N95/8511: Improved breather valve, the most comfortable to wear, and M-shaped nose clip, of course, the most expensive; N95/9211: a mask specially designed for the wearer of glasses, which can reduce the fogging problem of glasses, but the supply is very small; N95/9105: The cheapest portable N95 is easy to breathe, but the seal is not so good. This picture released by People's Daily is worth referring to: "Guidelines for Different Groups of People to Choose Masks" If you are not short of money, there are N99 masks. The filter rating of the N95 is 95%, while the filter rating of the N99 is 99%, which is better! But the price? If the N95 is 5 Canadian yuan, the price of the N99 will be as high as 50 Canadian yuan! The N95 is making a mountain out of a molehill just to fight the new pneumonia, not to mention the N99? The role of N99 is more like a "mask against biological and chemical weapons", which has long been out of the category of masks. Therefore, even if you are really "not poor in money", there is no need to wear N99 masks. Moreover, N99 masks are much harder to breathe than N95 mask. To sum up, if you can buy medical masks, then the priority is to consider medical masks. If you are really out of stock, you can buy N95. However, if the price really continues to rise,3 Ply Disposable Protective Face Mask, or to weigh: really need to spend several times the money, to buy a perhaps "fuss" N95, or even N99? Reprint statement Welcome to reprint the article of Vanfun Wenfang.com. Please specify the source for reprinting: "This article is reprinted from Wenfang.com. You can follow it by searching the micro-signal wenfangwang." Return to Sohu to see more Responsible Editor:. zjyuan-group.com