How long is the validity period of the mask? Can the 3m mask expire? - famous disposable mask price

Add Time:2021-10-18 Hits:22

Recently, when there was a shortage of masks, some people found out the masks they bought last year or even a few years ago. I don’t know if they have expired, and how long is the validity period of the masks? Can the 3m mask be used after it expires?


How long is the validity period of the mask


 Many people think that masks do not have an expiration date, but they do exist. There are many types of masks on the market, including disposable masks, 3m masks, and kn95 masks. The following is the specific expiration date of each mask. 3m masks When stored in the original packaging, and the storage environment temperature is -20℃~+30℃, and the relative humidity does not exceed 80%, the shelf life of 3M medical anti-particulate masks is 3 years from the date of production. Kn95 respirator Kn95 respirator is a kind of particulate dust respirator. The shelf life is about two years, and the validity period is generally 15 hours, which means that the mask needs to be replaced after wearing it for 2 hours a day and wearing it for about 7 days. Disposable masks Disposable masks are mostly fiber, so they cannot be washed or recycled. Wearing disposable masks is good for respiratory tract health, but they must be used within the validity period, and the production date and shelf life should be clearly seen when purchasing. Under normal circumstances, its shelf life is within two years.


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Can the 3m mask be used after it expires?


 Generally not recommended. Although 3m masks are not disposable masks, they cannot be used after their expiration date, because contaminants will breed for too long, which will affect the filter layer inside the mask and no longer have a better protective effect. Under normal circumstances, if you have been exposed to an infectious disease environment, or found parts (nose clips, straps) damaged, the inner layer of the mask becomes dirty, the breathing resistance becomes so great that you feel breathing difficulties, you should replace it immediately.


Can disposable masks be used for a few days?


 Disposable masks cannot be reused. If used for too long, large particles will be blocked on the surface of the mask or ultrafine particles will be blocked in the gaps of the mask filter material, which will cause the filtering effect to decrease and the breathing resistance to increase. If used repeatedly, the outer layer of the mask often accumulates a lot of outside air. The dust, bacteria, viruses and other contaminants in the environment can easily confuse the front and the back after repeated use, and breathe the fine dust and germs in the outer layer into the human body, endangering the health of the body.


How often do disposable medical masks be changed?


 Disposable masks are generally replaced within 8 hours and cannot be reused. If the disposable mask is moistened by the exhaled heat or saliva, its function of blocking germs will be greatly reduced. Therefore, it is best to prepare a few more masks so that they can be replaced. They should be changed and washed once a day. The method of wearing disposable medical masks is as follows: 1. The mask has white and blue sides. Place the white side inward and the side with the metal strip upward. First, tie the two lower straps behind the neck and tighten them! Make the lower edge of the mask reach the base of the chin; 2. Pull up the upper edge of the mask to cover the mouth and nose. The two upper straps are pulled behind the ears and fastened on the head. They cannot be tied to the ears. 3. Use the index fingers of both hands to press the metal wire on the upper nose of the mask to make it close to the skin of the nose, and then gradually move the index finger to the sides, so that the entire mask is close to the facial skin.

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