Do You Really Understand KN95 masks?
KN95 Face Mask Supplier will share this article about KN95 face mask with you.
How Long can KN95 Masks Be Used?
At present, foreign countries, including WHO, have not made clear conclusions on the best wearing time of N95 masks. Some researchers have done related research on the protection efficiency and wearing time of N95 medical protective masks. The results show that the filtration efficiency of N95 masks remains above 95% when worn for 2 days, and the respiratory resistance does not change much; the filtration efficiency is reduced to 94.7 after 3 days. %. The advice given by the US CDC is that when there is no sufficient supply of masks, as long as the equipment is not obviously soiled or damaged (such as creases or tears), it can be considered for reuse.
When the Following Situations Occur, The Mask Should Be Replaced In Time.
When the respiratory impedance increases significantly;
When the mask is broken or damaged;
When the mask and face cannot be closely attached;
The mask is contaminated (such as blood stains or droplets and other foreign objects);
It has been used in individual wards or in contact with patients (because the mask has been contaminated);
Do We Need a Breathing Valve?
N95 is divided into two types with or without exhalation valve. For people suffering from chronic respiratory diseases, heart disease or other diseases accompanied by breathing difficulties, using N95 respirators may make it more difficult for the wearer to breathe, so using N95 masks equipped with an exhalation valve can make them breathe easily, and help reduce heat buildup.
The design of the exhalation valve is very delicate, with several layers of flaps. When inhaling, the flap will close tightly to ensure that no particles enter. When you exhale, the flap will open, allowing the hot and humid air to escape. At the same time, there is also a soft flap inside to ensure that no small particles enter.
A study published in 2008 specifically investigated whether the exhalation valve affects the protection of the wearer. The conclusion is-the presence or absence of an exhalation valve does not affect the respiratory protection of the wearer. Simply put, N95 with an exhalation valve can protect the wearer but not the people around it. If you are a virus carrier, please use N95 without an exhalation valve and do not spread the virus. If you want to maintain a sterile environment, you can't use N95 with an exhalation valve, because the wearer may exhale bacteria or viruses.
How To Wear KN95 Mask Correctly
Ear strap type: easy to wear and take off, suitable for short-term outing use
Head-wearing style: fits tighter and is more comfortable to wear for a long time than the earband style
We can be selected according to actual needs
Precautions For Wearing KN95 Mask
Wash your hands before wearing a mask, or avoid touching the inner side of the mask while wearing a mask to reduce the possibility of contamination of the mask.
Distinguish the inside, outside, top and bottom of the mask; KN95 mask has the printed side as the outside; one end of the metal strip/sponge strip is above the mask.
Do not use your hands to squeeze the mask, including N95 masks, which can only isolate the virus on the surface of the mask. If you squeeze the mask with your hands, the virus will wet the mask with the droplets, and there is still a chance of infection.
Make sure that the mask is in good contact with the face. The simple test method is: After putting on the mask, exhale forcefully so that air cannot leak from the edge of the mask.