Under what circumstances do you need to replace your dust mask?

When dust masks are used for a period of time, their filtration efficiency will also be reduced to zero. In general, it should be replaced immediately if:

1. The particles absorbed by the mask are too high, and the user can feel the obstruction of breathing obviously;

2. Parts are damaged or damaged due to aging or failure (such as head band breaking and loosening, nose clip breaking and falling off, mask body damaged and deformed);

3. If the mask is contaminated, it should be replaced immediately after contact with the patient or suspected patient.

Different environment has different dust concentration, different use time of each person, different dust capacity of various dust masks, and different maintenance methods. These will affect the service life of 3M masks, so it is impossible to specify a specific replacement time of 3M masks.

From an economic point of view, if this does not happen, the 3M mask can continue to be used. However, long-term use of 3M masks can cause health problems and infections can cause serious damage

Can the mouth dustproof cover be washed and extended?

Dust masks can be reused, but once cleaned they can no longer be used. Since all the dust masks are made of high electrostatic filtration materials, the particles and PM2.5 in the air are filtered by electrostatic adsorption and cannot be cleaned, otherwise the filtration capacity of the material will be damaged.

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