At present, there are mainly four so-called "anti-smog masks" on the market:
1, mask
Gauze mask can filter out most dust and germs, but it has little protective effect on PM2.5
2, activated carbon mask
Activated carbon mask is added with activated carbon layer with adsorption function, but it only plays the role of isolating odor, and the effect of preventing particles and smog is not good.
3. Ordinary disposable medical masks
Generally, non-woven fabrics are used, which have the functions of defoaming and moisture absorption, but the effect of filtering particles is not ideal, which is not suitable for resisting PM2.5
4.N95 mask
N95 mask is one of nine kinds of anti-particle masks certified by NIOSH. "N" means that it is not suitable for oily particles (cooking oil fume is oily particles, but droplets produced by people talking or coughing are not oily). "95" means that the filtration efficiency reaches 95% under the detection conditions specified by NIOSH standard. N95 is not a specific product name. As long as it meets the N95 standard and has passed the NIOSH evaluation, it can be called "N95 mask".
In principle, the particulate matter protective mask must be selected according to the dust concentration and toxicity that users need to deal with. Residents can choose according to the air quality index released daily. If the air quality is good, they can choose ordinary masks. If the air quality is poor and the PM2.5 index is high, it is best to choose professional PM2.5 masks such as N95 masks to prevent smog.
How to wear N95 mask:
1, wash your hands.
2. Wear a mask according to the instructions.
3. Don't put anything between the protective mask and the face, including hair, beard, surgical mask and gauze mask.
4, shaping the nose clip, be sure to use both hands.
5, do wear air tightness inspection.
6, in use: air tightness check, when the external surface of the mask is polluted by body fluids, it should be replaced in time; The surgical mask on the protective mask cover can prolong the service life of the protective mask; Do not touch the surface of the mask with your hands.
7. Take off the mask: grab the mask headband with both hands from head to back and take off the mask. Do not touch the surface of the mask with your hands.
8. Wash your hands thoroughly after taking off the mask.
How to choose the right mask?
1, low resistance and high filtration are the key points.
The most ideal anti-fog mask should not only effectively block the invasion of fine particles, but also ensure the unimpeded breathing. Most anti-fog products in the market have poor sealing performance and greatly reduced filtration effect; However, a small number of masks can effectively block PM2.5, and because of its good sealing and high respiratory resistance, it is easy to make people lack oxygen and should not be worn for a long time.
2, safety and health can not be ignored.
Masks are health care products. The material selection requirements are non-toxic, tasteless and non-corrosive, and it is best to have the characteristics of softness, smoothness and no deformation. Otherwise, harmful substances in the material are likely to cause adverse consequences such as poor respiratory tract and skin allergy.
Step 3 Choose a mask with adjustable size
The filtering function of the mask focuses on the nose, so it is necessary to choose masks of different sizes according to the individual differences of the face. If the mask is too small, germs, dust and pollution can easily enter and exit from the edge of the mask or the gaps on both sides of the nose, which will affect the filtering function.
4, 100% fits the face to prevent smog, leaving no dead ends.
The better the sealing effect, the higher the filtration efficiency. However, some masks on the market can't fit the face perfectly, can't achieve the filtration efficiency marked on the package, and there will be a lot of air leakage.
Tips of Health Care Network: At present, many "anti-PM2.5 masks" are just sales gimmicks, and the anti-fog effect is not necessarily good. It is really necessary to prevent smog from causing harm to the body. Usually pay more attention to exercise and travel in a green and low-carbon way.