The prolonged epidemic of new pneumonia has made KN95 protective masks a hot topic of public concern. But many people do not understand what this KN95 means, and when we buy it, we often see that there are two kinds of masks, KN95 and N95. So, what is the difference between KN95 and N95 masks? Hefei C&P Non-woven Products Co., Ltd. will help you to understand the functional indicators of the purchased KN95 and N95 masks.
The KN95 mask is actually a respirator, the respirator is a type of respiratory protection equipment. Compared with ordinary masks, the KN95 is degsined to fit the face more closely and it can filter particulates in the air very effectively. The KN series is one of the grades specified in the Chinese standard GB2626-2006 for masks and other products; the N series is one of the grades specified in the American standard 42 CFR 84 for masks and other products; the FFP series is the European standard for masks and other products; the larger the number behind, the higher the protection grade. Among them, N means not resistant to oil, which can be used to protect non-oily suspended particles; 95 means 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. The technical requirements and test methods of KN95 and N95 are basically the same, and the filtration efficiency reaches 95% under the corresponding standard.
If worn correctly, KN95's filtering ability is better than ordinary masks and medical masks. However, it cannot completely eliminate the risk of infection or death even if it is fully compliant with the requirements,.
There are three main types of KN95 masks available for protection on the market, namely KN95 disposable masks, cotton KN95 masks with protective inserts, and professional protective masks. The main basis for selection is to see whether the "N95" masks are included in the technical parameters of the mask.
In addition to the protection efficiency, KN95 and N95 also strictly regulate the breathing resistance of the mask. The resistance value must be controlled within a certain range so that the wearer will not feel breathing difficulties or physical discomfort. The use time of the mask is affected by the dust holding rate of the material. In principle, KN95 and N95 can be used continuously for at least 8 hours. Considering the hygienic situation and preventing the secondary pollution of saliva and air pollution sources, it is recommended to change the mask every 24-48 hours. Activated carbon filter cotton only absorbs odor in addition to the function of filtering particulate matter.