How to choose a mask
N95 mask is NIOSH (National Institute of occupational safety and health) certification of a kind of anti particulate mask. N refers to the particles that are not suitable for some oil, such as the particles of fried vegetables. It is effective for the droplets produced by talking and coughing in daily life. According to NIOSH detection standard, 95% of pathogens can be successfully filtered. This is not a special brand of mask, but a standard of mask.
If it is to protect safety, reduce the risk of respiratory tract infection, it is best to wear medical surgical mask and N95 mask. Pay attention not to contact with patients with respiratory tract casually and keep basic hygiene in public places.
What should be paid attention to when using medical masks
First of all, the use of medical masks is by the shelf life, the general medical surgical mask shelf life is three years, and the medical protective mask shelf life is five years, if it exceeds the shelf life, the mask effect will be reduced a lot, so the shelf life is very important.
In addition, before wearing the mask, pay attention to wash your hands to avoid bacteria staying inside the mask. When you use the mask, you should not touch it casually. When you take off the mask, you should wash your hands.
① Ordinary gauze mask: the most common mask in life, which can be bought in supermarkets, online and drugstores, is also what we often call disposable masks.
② Medical mask: don't buy it online. It is usually sold in regular drugstores. This kind of mask can prevent lampblack.
③ Daily protective mask: professional, mainly used to prevent haze, commonly used by Beijing residents.
④ Dust mask: professional mask, better anti haze effect. The mask is mainly used to prevent dust, smoke, fog and microorganism. It is divided into kn100, kn95 and Kn90 grades. Kn100 grade can effectively prevent the superfine dust rate of more than 99.97%.
⑤ Oil fume mask: as the name suggests, it is a mask that can prevent oil fume, that is, the cotton mask mentioned above. It is mainly used to prevent oil fume and oil mist, and can also prevent dust, smoke, fog and microorganism. It is divided into kp100, kp95 and kp90 grades. Kp100 grade can effectively prevent the superfine dust rate of more than 99.97%.