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I recently bought masks. Domestic disposable masks for medical use are no longer ailable. Some people he turned their attention to overseas masks, but I don’t know what is the difference between KF94, KN95, and N95, and what is the meaning.

KF94, the national standard of South Korea, is also the standard anti-virus mask of South Korea.

KN95, this is China's national standard, KN95 is China's anti-virus mask.

The N95 that many people are eager to find is actually the US national standard antivirus mask.

Is it useful to wear these masks during the epidemic?

The KN95 protective mask standard means that non-oily particles with a diameter of 0.3μm filter more than 95%. In other words, it can filter at least 95% of particulate matter with a diameter equal to 0.3μm.

KF94 mask refers to a particle filter with a diameter of 0.4μm that has a filtration rate of over 94%, and 94% of a particle filter with a diameter equal to 0.4μm.

Be careful! The diameter is only about 0.1μm, but it can effectively prevent the common carrier of viruses: droplets. The diameter of droplets is generally between 1 and 4 μm.

Therefore, KF94 and KN95 can play a protective role, and KF94 is slightly equal to KN95, and can go out like N95.

Precautions:

Masks such as KF94 do not meet medical standards and should be replaced in time, which will affect lung capacity for a long time, and the longest time should not exceed 36 hours.

Pull the lower headband over the top of your head and place it behind your neck. Take care to adjust the twisted strap to a disposable mask. Then use the index fingers of both hands to press from the middle to both sides to make the shape of the metal nose clip consistent with the shape of the bridge of the nose. Disposable masks follow, and whether KN95 masks can be used for epidemic prevention of front-line medical staff has caused heated discussions. When many people buy facial masks, they find that it is also marked "KN95" instead of "N95"