In haze, masks are essential personal protective equipment. The air quality of the environment is different and the masks selected are different. There are professional PM2.5 masks and masks with replaceable filters. Mask Medical Mask mask cotton mask. Different types of masks have different service life. How long does it take to replace the mask?
PM2.5 mask
Generally, PM2.5 mask shall be replaced within 2 days. Professional PM2.5 protective masks such as n99 mask N95 mask will be replaced after two days of application, otherwise it will not have a good protection effect.
Besides, this mask is not suitable for long-term wearing. Because of their good air tightness, it is easy to cause people to breathe without oxygen. You can choose whether to wear professional PM2.5 mask according to daily air quality. If the air quality is good, you can choose the general dust mask.
Mask with PM2.5 filter
Masks that can replace PM2.5 filters are usually replaced every 8-10 days, and it is suggested that the mask body should be cleaned every 2-3 days. This type of mask is a filter, which can avoid the antibacterial effect of PM2.5 mask in the internal dust mask. Filters are generally disposable, usually 8 to 10 days (8 hours a day). If the filter is stained, replace it immediately.
Nano mask
Select the maintenance level and then look at the dust in the environment:
If only harmful gas is available, the selection of general tanks can meet the requirements; If it contains dust, then the tank should be integrated. According to the filter level, the filter can confirm the function level of filter dust:
P1: the filtration efficiency of general capacity: ≥ 95.0%;
P2: medium capacity filtration efficiency: ≥ 99.0%;
P3: higher filtration efficiency: ≥ 99.99%.
The higher the dust level of the filter tank, the smaller the diameter of the dust filter particles, the higher the function of the filter.
In summary, the way to select the tank is to check the maintenance type, the maintenance level and whether there is dust.
Masks are our "umbrella" for each of us, which can avoid the spread of droplets and reduce the risk of virus infection together. It is a habit to wear masks every day, but does one-time masks really need to be replaced every day? The old generation always thought that it was too wasteful to change masks. Just wear a mask repeatedly. Some people will continue to use masks after cleaning, masks can prevent disease, but accidentally may attract "trouble", how to use masks, today nano mask manufacturers say it clearly.
Four mistakes in masks. Do you have them?
1. Mask reverse repeat:
Academician Zhongnanshan once said that, for ordinary people, general medical surgical masks can resist the infection rate of the virus. However, the mask of medical surgery is generally disposable, and it is suggested that the wearing time should not exceed 4 hours, especially when the mask is damaged, wet or stained by secretion, it should be replaced immediately.
Because of the high heat and humidity environment, bacteria are easy to breed. Repeated wearing for a long time can not only prevent the bacteria, but also bring the pathogenic bacteria to themselves. If it is N95 mask, can wear it twice, but avoid contamination with the mask virus, bacteria, etc. After removal, put it in a ventilated and dry place for storage. It can be worn repeatedly without damage or dirt, but the number of times is no more than 5 times.
2. Continue to use mask after cleaning and disinfection:
The mask structure seems to be simple, but it is actually made of multi-layer structure. The inner layer can absorb moisture, the outer layer can isolate the liquid (saliva, water, blood), and the middle layer can isolate various particles. Mask of all levels of the use of special treatment, if repeated cleaning, high-temperature disinfection and other operations, then saliva, blood barrier will be reduced. So the effect of masks will be greatly reduced, what is the meaning of wearing such masks.
3. The mask is pinched and taken off
Many people like to take off the mask directly by holding the outside, but this is very unhealthy. Especially after wearing masks for a long time, the surface blocked various substances such as foam, virus, bacteria, etc. after touching with hand, it was not possible to wash hands and touch other places. The pathogenic bacteria may be transmitted.
It is suggested that when the mask is removed, the rope on both sides should be taken off the ear with both hands, and then wash hands with soap immediately.
4. Face and back of mask
The previous article has mentioned that the function of the inside and outside of the mask is different, the outer side can block the foam, the inside can absorb moisture. If the inside side is replaced with the wear, the inside side can not have the effect of moisture absorption, and the outer side can not prevent the pollution of the foam.
May 08, 2021
