Kn95 Disposable Three-Dimensional Protective Respirator:The mask cannot be washed and cannot be used twice. Mask filtering uses the principle of electrostatic adsorption to isolate pollutants. If it is washed with water, it has no adsorption function and becomes a piece of cloth. The contaminants (viruses and bacteria) absorbed by the mask will be distributed on the surface and inside of the mask. There is currently no way to completely kill the bacteria and retain the barrier function through disinfection.

The mask has a shelf life, and the protection capacity of 5 years is reduced by 2/3

Generally, the shelf life of masks is between two to five years. Long-term storage and changes in ambient temperature and humidity will destroy the electrostatic dust collection capability of the meltblown cloth, resulting in a greatly reduced filtration efficiency. Taking the N95 mask as an example, the protective effect can only reach about 30 after 5 years.

If you have symptoms, do not wear a respirator mask

The breathing valve can reduce the sultry feeling when using the mask, but it will also discharge droplets or bacteria out of the mask. Therefore, if you suspect that you are infected or have been infected, you can no longer choose to wear an exhalation valve mask.

Most people don’t need to wear two masks

The protective ability of a Kn95 Disposable Three-Dimensional Protective Respirator mask depends on two aspects, filtering performance and protective effect. The filtering performance mainly depends on the material, and the protective effect depends on the fit of the mask to the face. It has nothing to do with the number of layers of the mask. Wearing multi-layer masks can cause respiratory obstruction and even suffocation.No matter what kind of mask you wear, you must wash your hands carefully before wearing it.It is best to wash your hands with soap or disinfectant.

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