These days, the whole country is concerned about masks: “medical masks”, “medical care masks”, “medical surgical masks”, “medical protective masks” …… and “N95”, “KN95”, and even “FFP2 “and so on …… you do not blink? It looks like a mess, so many different names, different types of masks, you will really choose? Medical surgical masks: YY0469-2011 Medical surgical masks must refer to the pharmaceutical standard YY0469-2011 for production, if the company sets its own corporate standards to meet or even higher than the requirements of YY0469, can also be printed on the outer packaging of the mask (therefore, it is not necessary to have YY0469 to be considered qualified, it is still necessary to look at the specific name of the mask and the content of the corporate standard to identify). Surgical masks are mainly used in hospitals for surgery, placement of tubes and other invasive operations, sense control key monitoring departments also generally require the use of such masks. YY0469 has requirements for bacterial filtration performance of surgical masks, generally the filtration efficiency of non-oily particles should reach more than 30%, and the filtration efficiency of bacteria should reach more than 95% (note that here is not the meaning of N95, do not confuse with medical protective masks), in addition, medical surgical masks also have requirements for synthetic blood penetration (can be simply understood as anti-permeability), when enterprises make Generally, the mask will be divided into three layers: the internal absorbent layer, the middle filter layer, the outside waterproof layer, each layer has a special role. KN type masks: GB2626-2006/2019 Due to the different workplaces, the particulate matter people are exposed to can generally be divided into two categories: oily and non-oily, of which “KN” type masks are mainly used to protect non-oily particulate matter masks, while “KP “type mask can protect both oily particulate matter and non-oily particulate matter, for example, the chemical industry is more exposed to oily particulate matter (such as paraffin oil vapor, etc.), the general use of KP type mask; other industries, including ordinary civil, is the main KN type mask (of course, there are also some civil haze mask can use KP type mask). According to GB2626 standard requirements, KN-type masks, according to its filtering performance of non-oil particles to be divided again, there are familiar with KN90, KN95, KN100 three masks. Among them, KN95 masks, the filtration performance of non-oily particulate matter (tested with sodium chloride) reaches more than 95%, and is one of the most common masks. See here, I wonder if you have found a problem, just before, has given you medical surgical masks (YY0469-2011) requirements for non-oily particles filtration performance of ≥ 30%, which is much lower than the KN95 mask requirements of ≥ 95%, so many people naturally think: KN type masks, especially KN95 type masks, certainly better than medical surgical masks The effect is better! Is this absolute? Surgical masks have impermeable requirements, generally divided into three layers, the outermost layer is waterproof layer, the main reason for using masks in the medical environment is to isolate bacteria, and once the bacteria are attached to the outer surface of the mask, it is very easy to follow the moist mask directly into the inside of the mask, so it is very important to prevent infiltration! Throughout GB2626, there is no standard requirement for waterproof KN type masks, not only KN type masks, but also KP type masks, which means that all qualified masks that meet all the standards of GB2626 have no requirement for anti-permeation. In this regard, KN type masks, are inferior to surgical masks! Is it good or bad to have a breathing valve? Because both doctors and patients wearing masks cannot guarantee that they are healthy and virus-free (infectious during the incubation period), and the airflow of masks with exhalation valves is only one-way protection, which is not good enough to cut off the transmission route. From the perspective of epidemic control, two-way protection is the most correct way, so these masks are not recommended. Protective mask standard: GB19083-2010 China’s GB19083 does not have the “N95” statement, but uses “level 1” “level 2” and “Level 3” is used to indicate the filtration efficiency level, and generally level 1 can meet the requirements of “N95/KN95”. In other words, as long as any “medical protective mask” meets the GB19083 standard, it has definitely achieved the filtration efficiency of N95 and KN95 level. In addition, and YY0469-2011 medical surgical masks, GB19083 also put forward the “synthetic blood penetration” requirements, but also an additional “surface moisture resistance” parameter requirements, a clear medical protective masks on blood body fluids These are not available in GB2626 (KN type). 1.KN type masks conforming to GB2626 cannot be used in medical operations, especially in high-risk operations such as tracheotomy and tracheal intubation, where splashing is possible, because they cannot guarantee that the masks are not wetted. 2.Masks of grade 1 or above conforming to GB19083 can achieve 95% filtration and also prevent liquid penetration, and can be used for various operations in medical institutions. 3.Medical surgical masks conforming to YY0469 can not reach 95% filtration, but can prevent liquid penetration, and because their fit with human face is not as good as medical protective masks, they are generally not used for the protection of high-risk operations, but can meet the ordinary risk operations. The above-mentioned, are used for the choice of medical institutions, that the masses of people should actually how to choose it? 1, can choose medical surgical masks, try to choose surgical masks, anti-permeation. No on the choice of KN type, in line with the GB19083 level one mask (on the box) basically reach N95/KN95 filtration level, the other …… The actual protection effect is not ideal. 2, can choose no breathing valve masks, try to choose no breathing valve masks.