The n95 mask of Zhongyan is of good quality and breathable, and also meets the national mask standard.
Strictly speaking, it is best to change the N95 mask every 4 hours. However, the service life of masks is affected by many factors, such as the concentration of particulate matter in different environments, the way of use and storage, etc. , need to combine the specific situation to judge.
For ordinary people, CDC suggested that if the supply of N95 masks is insufficient, if there is no damage and pollution, we can consider reusing N95 masks and replacing them every two days.
According to the research results of N95 protective efficiency and wearing time, the filtering efficiency of N95 mask remained above 95% after wearing for two days, and the respiratory impedance changed little. If you need to use it repeatedly, you should pay attention to the preservation method, take off the N95 mask, dry it and keep it clean.
The difference between n95 sterilization and non-sterilization:
1. Generally, sterilized masks are sterilized with ethylene oxide, while n95 non-sterilized masks are not sterilized with ethylene oxide. In short, the sterilization degree of medical sterilization masks is higher than that of medical non-sterilization masks.
2. In terms of manufacturing requirements, sterile masks should meet the microbial control standards, and only a certain number of bacteria are allowed, but the filtering effect must be greater than 95% within the control range. In addition, in the manufacturing process, the sterility level of sterilized masks in the production workshop is higher than that of unsterilized masks.
3. In terms of use, disinfection masks can be used in clinical surgery, hospitals, risk control areas and other places; Non-sterile masks can be used for daily protection, foggy days or when there is a lot of dust.