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Views: 80 Author: Site Editor Publish Time: 2023-03-01 Origin: Site
Besides the filtering efficiency of the KN95 mask, the density of the mask and face is one of the important factors determining the effect of the mask. Different types of masks have great differences in the suitability for the human face. Therefore, when using KN95 masks, the suitability of the masks should first be tested. When testing the face of the wearer for density, it shall be ensured that the air can enter and exit through the mask when it is close to the face edge. Let us read the following words and get more information about the KN95 mask.
What are KN95 masks?
What function do KN95 masks have?
How long can KN95 masks be used?
The KN95 mask is one of nine types of particle protection masks certified by GB2626-2019. "N" does not mean oil-resistant. 95 "means that when irradiated with a certain number of special test particles, the particle concentration within the mask is more than 95%lower than the particle concentration outside the mask. The value of 95% is not an average but a minimum value. KN95 is not a specific product name as long as the product N95 standard met and NIOSH verification is in place, it can be called "KN95 mask". The level of protection of N95 means that under the test conditions defined by the NIOSH standard the filter efficiency of the mask filter material for non-oily particles (such as dust, acid mist, stain bubbles, micro-organisms, etc.) 95% reached.
If there are two figures of 95, this means that the protective capacity of this mask is more than 95%. In other words, for tiny substances that are larger than 0.3 micrometers, the defensibility of this mask is more than 95%, and it can block tiny substances that are larger than 0.3 micrometers from the outside of the mask. The size of microorganisms such as viruses and bacteria is generally larger than 0.7 microns. Therefore, the use of masks such as KN95 can effectively protect against viruses.
There is currently no clear conclusion on the best wearing time of KN95 masks abroad, including the WHO, and various countries have not adopted any relevant rules on the wearing time of masks.
Some researchers have conducted relevant studies on the protective efficacy and duration of KN95 medical masks. The results show that after wearing KN95 masks for two days the filtration efficiency remains over 95% and the respiratory resistance does not change significantly; the filtration efficiency is reduced to 94,7%.
The CDC points out that, in the absence of an adequate supply of masks, re-use may be considered as long as the device is not visibly contaminated or damaged (e.g. crushed or torn).
Xiamen PinzTec Co., Ltd has been a trusted supplier of KN95 masks for many years. If you choose this company, you will get the best quality products and the most intimate customer service.
