N95、N90、KN95、3M…… How to choose masks in special period ？ _ Protection

Original title: N95, N90, KN95, 3m.. How to choose masks in special period ？ Recently, people have paid great attention to the prevention and control of the pneumonia epidemic infected by the new coronavirus. As an important part of personal protection, wearing masks is helpful for prevention. But the choice of masks is also an important issue, I believe we all have the same doubts, what kind of masks should be chosen to be effective? I hope the following classification summary will be helpful to you: What is N95 mask? The N95 mask is one of nine NIOSH (National Institute for Occupational Safety and Health) certified particulate masks. N “means not resistant to oil.” 95 “means that the particle concentration inside the mask is more than 95% lower than that outside the mask when exposed to the specified number of special test particles. The value of 95% is not an average, but a minimum. The protection grade of N95 means that under the testing conditions specified by NIOSH standard, the filtering efficiency of mask filter material to non-oily particles (such as dust, acid mist, paint mist, microorganisms, etc.) reaches 95%. N95 is not a specific product name, as long as it meets the N95 standard and passes the NIOSH review, it can be called “N95 mask”. The filtering efficiency of N90 mask reaches 90%. Scope of use of N95 respirator: Protection of medical staff and related workers against airborne respiratory infectious diseases. Basic protection for medical staff or related personnel, and protection against the spread of blood, body fluids, and splashes during invasive procedures. Disposable sanitary care in an ordinary environment, or barrier or protection against particles other than microorganisms, such as pollen, etc., pathogenicity. Other NIOSH certified particulate masks include N95, N99, N100, R95, R99,Against Bacteria Breathable KN95 Face Mask, R100, P95, P99 and P100. These protection levels can cover the protection range of N95. “N” means not resistant to oil, suitable for non-oily particles, no time limit for use. ” R “means resistant to oil, suitable for oily or non-oily particles, if used for the protection of oily particles, the use time is not more than 8 hours.” “P” means oil proof, suitable for oily or non-oily particles, if used for oily particles,Virus Prevention Mask 3 Ply with Earloop, the use time shall follow the manufacturer’s recommendations. Expand the full text “95,” “99,” and “100” refer to filtration efficiency levels when tested with 0.3 micron particles. ” “95” indicates that the filtration efficiency is above 95%, “99” indicates that the filtration efficiency is above 99%, and “100” indicates the filtration efficiency of above 99.7%. What is a KN95 mask? According to the performance, it is divided into KN and KP. KN is only suitable for filtering non-oily particles, while KP is suitable for filtering oily particles. KN Series: KN100: For non-oily particles above 0.075 micron, the filtration efficiency is greater than 99.97 percent KN95: For non-oily particles above 0.075 micron, the filtration efficiency is greater than 95 percent KN90: for non-oily particles above 0.075 micron, the filtration efficiency is greater than 90 percent KP Series: KP100: the filtration efficiency is greater than 99.97% for oily particles above 0.185 micron. KP95: for oily particles above 0.185 micron, the filtration efficiency is greater than 95 percent KP90: for oily particles above 0.185 micron, the filtration efficiency is greater than 90 percent Scope of use of KN90 respirator: It is mainly suitable for industries producing oily and non-oily particulate pollutants such as dust, smoke and fog of more than 0.185 microns in non-ferrous metal processing, metallurgy, iron and steel, coking, gas, organic chemical industry, food processing, Antivirus Disposable Mask with CE Certificate ,Quickly Delivery Disposable Protective Clothing, construction, decoration, petrochemical and asphalt. Therefore, the technical requirements and test methods of KN95 masks and N95 masks are basically the same, but they belong to the standards of different countries. What is a 3m mask? “3m masks” refer to all products produced by 3m Company that can be called masks, which can be divided into three categories: medical masks, particulate protective masks and comfortable and warm masks. Each type of masks has different protective emphasis. 3m medical protective masks are divided into domestic and imported, with the protective performance of surgical mask and particulate protective masks, which are specially used in hospitals to filter particulate matter in the air and block droplets, blood, body fluids and secretions. 3m particulate protective mask is commonly known as 3m dust mask. The use of protective masks to protect the health of workers at work belongs to the category of occupational health. Particulate masks are used to reduce all kinds of harmful particles suspended in the air inhaled through the respiratory tract (from coarse dust, dust, fine dust, smoke, smoke produced by various production processes, air pollutants PM2.5, including fine pathogens). 3m masks (highly effective protection against harmful particles) beginning with 90, 93, 95, 99, 8210 and 8110s all meet the requirements of PM2.5 protection in China! But if you want to exhale smoothly, , and comply with US or EU standards, please select 8210V, 9322, 9332! To meet the requirements of the World Health Organization for influenza protection , select 9010, 8210, 8110s, 8210v, 9322, 9332! (Suitable for young children). What is a medical surgical mask? The surgical mask is a mask worn by medical staff at work. It is mainly used in medical clinics, laboratories, operating rooms and other high-demand medical environments, with relatively high safety factor and strong resistance to bacteria and viruses. Surgical mask can also be used to prevent the spread of influenza and respiratory diseases. The medical surgical mask has three layers, namely a waterproof layer, a filter layer and a comfort layer from outside to inside, and the comfort layer is a layer of gauze. To sum up and compare: From the perspective of protection capability: N95 mask ≈ KN95 mask > N90 mask > surgical mask > ordinary mask Wearing comfort: ordinary mask ≈ surgical mask > KN95 mask ≈ N95 mask. Hint The outer layer of the mask often accumulates a lot of dirt such as dust and bacteria in the outside air, while the inner layer blocks the exhaled bacteria and saliva. Therefore, the two sides can not be used alternately, otherwise the dirt on the outer layer will be inhaled into the human body when it is directly attached to the face, and become the source of infection. When the mask is not worn, it should be folded and put into a clean envelope, and the side close to the mouth and nose should be folded inward. It should not be stuffed into the pocket or hung around the neck. If the mask is wetted by exhaled heat or saliva, its ability to block germs will be greatly reduced. Therefore, it is better to prepare more masks for replacement at ordinary times, which should be changed and washed once a day. Masks should be cleaned and disinfected every day. Both gauze masks and air filter masks can be disinfected by heating. The specific measures are as follows: 1. Cleaning 。 First, gently rub the gauze mask with warm water and soap. The bowl-shaped mask can be gently brushed with a soft brush dipped in detergent, and then washed with clean water. Please note that do not rub hard, because if the warp and weft gap of the gauze is too large, it will lose the effect of preventing droplets. 2. Disinfection 。 Soak the cleaned mask in 2% peracetic acid solution for 30 minutes or boil it in boiling water for 20 minutes or steam it in a steamer for 15 minutes, and then dry it for later use. This method is suitable for gauze masks and bowl-shaped masks. 3. Check 。 Before using again, you should carefully check whether the mask and mask are still in good condition. For gauze masks and masks, you can take the light transmission inspection method, that is, take care of them in front of the lamp to see if there is any obvious light spot, and if the light transmission rate of the middle part and the edge part is consistent. If there is any doubt, you should replace them with new ones. In any case, masks and masks are generally renewed after 3 to 7 times of cleaning, and masks of particularly good quality can be cleaned 10 times. Activated carbon adsorption mask should pay attention to regular replacement of activated carbon interlayer,KN95 Mask for Epidemic Prevention and Control, if the activated carbon interlayer is not replaceable, it should be replaced after 7 to 14 days, this mask can not be cleaned and reused. Lightning News reporter Wang Yu reports back to Sohu to see more Responsible Editor:. zjyuan-group.com