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Mask type

Source:http://www.hctissuemachine.comAdminname:HI-CREATEWriter:HI-CREATEHit:Date:2020-04-15 14:55
From the point of view of protection capabilities, from strong to weak, they are medical protective masks, medical surgical masks, and disposable medical masks, while the particle filtering efficiency of KN95, N95, and FFP2 masks is basically the same.
Disposable medical masks: daily use
Disposable medical masks should comply with the Chinese pharmaceutical industry standard "YY / T0969 Disposable medical masks", bacterial filtration efficiency (BFE) ≥95%. The bacterial filtration efficiency is determined by experiment. In short, it is to spray bacterial aerosol on the mask to test how many bacteria can be filtered out.
 
The mask must have a protective effect, and should not make the user feel too stuffy or even difficult to breathe after wearing it. Therefore, the disposable medical mask needs to be tested for ventilation resistance. The ventilation resistance should not be greater than 49 Pa / cm2. This type of mask is suitable for ordinary people when they are not in contact with patients with fever, cough and other symptoms. Generally, it is enough to go out and take public transportation.
Disposable medical mask
Medical surgical masks: available to the hospital
Disposable medical masks can effectively filter bacteria, but the virus diameter is only about 0.1 microns, which is much smaller than the virus with a diameter of about 0.5-5 microns. To resist more "sly" viruses, medical surgical masks are needed. Medical surgical masks should comply with the Chinese medical industry standard "YY0469 medical surgical masks", which can filter most bacteria and some viruses, and resist a certain degree of blood, body fluids and other splashes.
Medical surgical masks are suitable for the hospital environment. They have long-range contact with patients with fever, cough and other symptoms greater than 3 meters. It is recommended to wear it if you go to the hospital or visit the patient.
Medical surgical mask
Medical protective mask: used when contacting patients with new coronary pneumonia
 
Medical surgical masks are not enough for medical staff who need to wear masks for a long time and often come into contact with blood, body fluids, and droplets. In this case, medical protective masks are needed. Medical protective masks comply with the national standard "GB19083 Technical Requirements for Medical Protective Masks", which can filter most microorganisms, can resist a certain degree of splashing of blood, body fluids, etc. The outer surface has a certain waterproofness and high adhesion.
Medical protective mask
KN95 mask: available for patients with short-term exposure to new coronary pneumonia
KN95 is a kind of mask that people are more familiar with. According to China's national standard "GB2626 Respiratory protective equipment self-priming filter anti-particulate respirator", the filter elements of the filter type respiratory protective equipment can be divided into KN and KP categories according to the filtration performance. The KN type is only suitable for filtering non-oily particles, and the KP type is suitable for filtering oily and non-oily particles. For microbes, just look at KN. The numbers after KN and KP refer to the level of filtration efficiency. The higher the number, the better the filtering effect.
 

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