N95 medical face mask is an American standard, and KN95 mask is a Chinese standard. "N" stands for non-oily particulate matter, "95" stands for the minimum protection level of 95%, N95 and KN95 face masks can provide better protection in daily life. the mask without breathing valve: two-way protection, whether inhaled or exhaled, it must be filtered by the face mask. There is a one-way breathing valve with face mask: the wearer can only protect himself, not the environment. It is recommended that you wear the face masks without breathing valves. Masks above the N95 level can theoretically be used for 2 to 3 days, KN95 fftp3 face masks can be used for 1 to 2 days, the masks can not be reused after removal, and the maximum use time of disposable surgical protective face masks is only 4 hours, should be replaced immediately after wet.
The Kn95 medical mask is a Chinese standard mask with fttp2 that can block 95% of non-oily particles with a diameter of 0.3 cm and above. This face mask is used by doctors who are in clinical contact with infected patients. It can prevent droplet infections caused by patients' body fluids and blood splashes. Our ordinary people can use disposable medical masks to stop droplet infection. During the spread of COVID-19, you should do less going out, wash your hands frequently, exercise actively, and enhance the body's ability to resist disease.
The wearing time of the N95 face mask is theoretically about 40 hours, but if the external environment is heavily polluted and there is obvious moisture on the inside, it should be replaced in time, and it is not completely fixed. It is recommended to proceed according to the specific situation now, so as to improve the protection ability, minimize going out, pay more attention to drinking water, ventilate indoors, and maintain the air circulation.
There are also different styles of KN95 face masks, but a moisture-proof material is added in the middle of the production materials to avoid the damage to the doctor due to the penetration of the face masks by the patient's blood spray. The diameter of the filtered particles is consistent with the medical grade N95 medical face mask.