Be sure to wear a mask! !! Even if you are exposed to an infected person, wearing a mask can prevent you from inhaling the virus directly.
These individually packed masks are a respirator type of respiratory protection equipment which is designed to fit the face more tightly than an ordinary mask and can filter the particles and droplets in the air very effectively unlike standard surgical or dust masks. Featuring 5 layers of protection including a 0.5 micron PP non woven fabric, activated carbon layer, 0.3 micron static cotton filter, cotton electrostatic filter and PP non-woven fabric.
The masks feature a 43mm dia one-way respiratory valve that allows warm air to disperse with only a respiratory resistance of 47Pa, a concealed nose clip with a built-in sponge for comfort to seal to the face, a welded lanyard that is strong and includes a neck hanging adjustable buckle.
Is there a difference between KN95 and N95?
Different countries use different codes and numbers to name their respiratory face masks. They are all very similar.
- The N95 is the USA standard,
- The KN95 is the Asian standard,
- The KF94 is the Korean standard and
- FFP2 is the EU standard. This includes the UK.
N indicates that the mask is Not resistant to oil, can be used to protect non-oil suspended particles; 95 defines that the filtration efficiency is greater than or equal to 95%, indicating that after careful testing, this respirator can block at least 95% of very small (0.3-micron level) test particles.
When worn correctly, the KN95`s filtering ability is better than the ordinary mask and medical mask. However, even if worn in full compliance, 100 per cent of the risk of infection cannot be eliminated.
Why wear a mask!
Coronavirus or COVID-19 is transmitted between people, usually when someone is exposed to the secretions of the infected person. The transmission of the virus directly affects the transmission route. The current route of transmission of the new coronavirus is unclear, but past experience has shown that exposure to the body fluid that the infected person coughs or sprays, or shaking hands with the infected person lead to infection. If your hand touches something that the infected person has touched and then touches your own mouth, nose or eyes, it may also infect the virus.
Normally, people have about a litre of fluid in their lungs, which, each time they sneeze, spray like a squeezed water bottle is projected from the body. In vitro, they are divided into more than 40,000 droplets, each containing a large number of viruses and bacteria. Because of the huge thrust in the body, the velocity of these liquids can be as high as 35 m/s, and the propagation distance can reach 3-8 m.
So be sure to wear a mask!!! Even if you are exposed to an infected person, wearing a mask can prevent you from inhaling the virus directly from the droplets.
How long can KN95 mask be used?
Currently, there is no clear conclusion about the lifespan of KN95 masks, including from the WHO, and there is no relevant regulation that addresses this either.
Some researchers have studied the protective efficiency and wearing time of KN95 medical masks. The results show that the filtration efficiency remains above 95% KN95 wearing the masks for 2+ days, and the respiratory resistance changes little, and the filtration efficiency decreases to 94.7% for 3 days.
