Use of 3m mask
1, wearing a mask, has the advantages that the stress point of the belt is behind the head and neck, the stress is uniform, the comfort is high, the mask is not easy to fall off, and the risk of infection is reduced; The disadvantage is that it is relatively inconvenient to use, especially for women with long hair;
2. The advantage of earmuffs is that they are simple and convenient to use, but the disadvantage is that the stress points are in the ears, which will hurt if worn for a long time. Once the headband falls off, the whole mask is easy to fall off, increasing the risk of infection;
3. A compromise between a mask worn on the neck, a mask worn on the head and a mask worn on the ear. At present, there is only one model of 3M: model 9005, KN90 grade, no breathing valve.
How to choose a 3m mask?
What models of 3m masks do you have?
1, cup mask, the advantage is that the internal space of the mask is relatively large, the disadvantage is that it is inconvenient to carry; Common 3M cup masks are: 8210 (8110s), 1860( 1860S), 8247, 99 13V, 8822 and 8822.
2, folding mask, the advantage is easy to carry, the disadvantage is that the internal space of the mask is relatively small; Common 3M folding masks are: 900 1(V), 9002(V), 904 1, 9042, 902 1, 9022, 90 10/,950 1. 9320, 9322 and 9332 belong to special folding masks, and the space is relatively large. The 9322 and 9332 are also equipped with breathing valves to improve comfort.
Compared with ordinary dust masks, the 3m dust mask with activated carbon layer has played an important role in absorbing gas odor, peculiar smell and trace toxic dust, and has no hindrance to dust prevention efficiency.
3M activated carbon dust mask has two kinds of protective masks, 8246 and 8576, which can prevent the odor of alkaline gas and particles. Both masks are made of bone charcoal, which can prevent the smell of particulate matter and trace alkaline gas. For example, after air purification, there will be a large number of alkaline gases such as sulfur dioxide, sulfur trioxide and freon, which will react with oxygen in rainy days to generate weakly acidic chemicals such as sulfuric acid, which will be very harmful to people and things.
Let's first explain the 3m dust mask to prevent the smell of organic steam. This requires a dust mask to prevent the odor of alkaline gas and increase the harm of alkaline substances to human body. Therefore, amateur dust masks can be used under dust conditions without peculiar smell. Activated carbon masks not only have no essential function, but also have a greater barrier to deep breathing and increase profits. As for the situation with peculiar smell, such as dye, laboratory test and messy situation, 3M activated carbon mask should be used to prevent peculiar smell.
The 3m dust mask adopts imported high-efficiency electrostatic filtering material and magic bone charcoal deodorizing layer, which can prevent organic vapor odor and non-oily particles, and meets KN90 and New Zealand P 1 grade, with a filtering efficiency of over 90%. Suitable for petrochemical industry, chemical industry, nonmetallic casting, primer, processing building, laboratory and other occasions.
Both masks can filter non-oily and oily particles, with a filtration efficiency of over 95%, and are suitable for chemical industry, paper making, brewing, aluminum casting, glass products and other industries. The 3M dust mask has passed the American R95 specification, and the working time under oily conditions shall not exceed 8 hours. However, the 3M dust mask has passed the American P95 specification, and the working time can be as long as 40 hours under oily conditions. Moreover, it is equipped with 3m patented cold-flow breathing tube, which is more suitable for wearing in hot and humid conditions for a short time. This is the difference between them.
How long can a 3m mask last?
3m masks are all made of high electrostatic filtering materials, which filter particulate matter and pm2.5 in the air and cannot be washed with water, otherwise the filtering ability of the materials will be destroyed. At the same time, when the mask is used for a period of time, its filtering efficiency will be reduced to zero. Generally speaking, dust masks should be discarded under the following circumstances:
1. The particulate matter absorbed by the mask is too high, and the user obviously feels that breathing is blocked;
2. Parts are damaged, aged, damaged or invalid (such as broken or loose headband, broken nose clip, falling off, damaged or deformed mask body, etc.). );
3. The mask is contaminated, such as liquid splashing.
Generally speaking, 3M dust mask can be used for one to two weeks, with or without valve mask for at most one or two weeks, but it depends on the pollution level of the specific environment. If the air pollution is serious, the use time will be shortened. Users should change masks in time according to the actual situation.
Choosing the right mask is only the first step of protection. If the protection really works, it must be used correctly, which includes not only wearing it according to the instruction manual to ensure the correct position (no air leakage) every time, but also insisting on wearing it when the dust is exposed, finding the signs of mask failure in time and replacing it in time. P series protective masks can be used to protect non-oily and oily particles, and have a service time for oily particles.
Service life: cumulative use of 40 hours or 30 days, whichever comes first; The dust concentration in different dust exposure environments is different, the use time of each person is different, the dust capacity of various dust masks is different, and the use and maintenance methods are different, which will affect the service life of masks, so there is no way to uniformly stipulate the specific replacement time. When any part of the dust mask is damaged, broken or lost (such as nose clip and nose clip pad), and the respiratory resistance is obviously increased, the whole mask should be scrapped.
How long can a 3m mask last? There is only an approximate time limit, and there is no clear regulation. I suggest you change it in two or three days. Under normal circumstances, it is mainly based on the use, damage and hygiene of masks to judge whether to abandon them. Experts remind consumers not to be cheap and not to change protective masks for a long time, so as not to induce respiratory diseases. Next, let's take a look at how to choose an anti-fog mask. Which model of 3m mask is good?
The best mask for smog prevention is N95, which can effectively prevent pm2.5 from reaching 95%. However, the material of this mask is too dense, and it will make you feel difficult to breathe. If you wear this mask on a bicycle, you will feel more difficult to breathe, which will easily lead to symptoms such as headache and dizziness due to insufficient oxygen supply to the brain. Compared with N95, 90% pm2.5 filtered KN90 mask is more suitable for ordinary people to wear.
It's best to wear 95 series 3M mask, after all, the filtration index is higher. I think the overall suitable models are: 82 10/0,9010,9005. Of course, the more expensive, the better, such as 9332.