Original title: Differences between medical masks, N95 masks and KN95 masks, and guidelines for the correct use of masks In order to let everyone not buy masks blindly and not spend money unjustly! Xiaozhen has collected the differences between different masks for your reference! Fight the virus together and do a good job of protection! Can be shared with those in need! N95 mask 1 Implementation of standards GB2626-2006 Airtightness OK Expand the full text Particle Filtration Efficiency (PFE) ≥95% Bacterial Filtration Efficiency (PFE) Not stated Filtering effect At least 95% of very small particles (on the order of 0.3 microns) are blocked. Use scenarios Used to protect all kinds of particulate matter Service life 6-8 hours, 24-36 hours in case of shortage Characteristic Flame retardancy requirements; leakage rate requirements; respiratory resistance requirements; dead space requirements; air tightness requirements, etc. surgical mask 2 Implementation of standards YY0469-2011 Airtightness General Particle Filtration Efficiency (PFE) ≥30% Bacterial Filtration Efficiency (PFE) Not less than 95% Filtering effect Generally, it can filter particles of about 5 microns, the outer layer has a waterproof layer to prevent droplets from entering, the middle layer is a filter layer, and the inner layer is a veneer layer. Use scenarios Worn by clinical staff during invasive operation, etc. Service life Replace after 4 hours of general use Characteristic Maximum blood permeability requirement (120mmHg) Medical disposable mask 2 Implementation of standards YY0469-2011 Airtightness General Particle Filtration Efficiency (PFE) ≥30% Bacterial Filtration Efficiency (PFE) Not less than 95% Filtering effect Generally, it can filter particles of about 5 microns,Medical Quickly Delivery Antivirus Coverall, the outer layer has a waterproof layer to prevent droplets from entering, the middle layer is a filter layer, and the inner layer is a veneer layer. Use scenarios Worn by clinical staff during invasive operation, etc. Service life Replace after 4 hours of general use Characteristic Maximum blood permeability requirement (120mmHg) Cotton mask 4 Implementation of standards No unification Airtightness Slightly worse Particle Filtration Efficiency (PFE) Not stated Bacterial Filtration Efficiency (PFE) Not stated Filtering effect Only large particles such as dust,3 Ply Disposable Protective Face Mask, powder or pollen can be filtered. Use scenarios Protection for daily life Service life Short protection time, not specified Characteristic Can be repeatedly cleaned Guidelines for the correct use of masks (1) Types of masks and objects of use: 1. Disposable medical mask : Recommended for use by the public in non-crowded public places. 2. surgical mask The protective effect is better than that of disposable medical masks. It is recommended that suspected cases, public transport drivers, taxi drivers, sanitation workers and service personnel in public places wear them on duty. 3. Protective mask for particles of KN95/N95 and above: The protective effect is better than that of surgical mask and disposable medical masks. It is recommended for on-site investigation, sampling and testing personnel. The public can also wear it in highly crowded places or closed public places. 4. Medical protective mask It is recommended to be worn by medical staff in fever clinics and isolation wards and during the transfer of confirmed patients. To sum up, there is no need for ordinary people to wear N95, and medical general surgical masks are OK. (II) Replacement frequency: In fact, KN95 Face Mask ,Virus Prevention Mask 3 Ply with Earloop, on the issue of replacement frequency, The last key point is that the posture is very important, otherwise it is useless to wear it! Xiaozhen appeals to everyone that it is now a period of concentrated outbreak of the virus, do not go out unless absolutely necessary,Medical Full Body Coverall, and you must wear a mask when you go out! Long press the identification QR code to follow us More exciting content in the treasure of technology ~ The above pictures are from the Internet. Contact us to delete them. The content of this article is for reference only, not as a medical basis to return to Sohu, see more Responsible Editor:. zjyuan-group.com