Can anti haze mask really prevent haze? Media measured 50% of the effect is average!

the experimental samples include 26 adult masks and 14 children masks, which are commonly used in the market. The main purpose is to test the filtration effect of mask samples on particulate pollutants

in the experiment, a simulated head model was used, and a suction pipe was set at the nose. After wearing the mask, the wearing effect was checked, and the filtering effect was tested. This photo / Beijing News reporter Wang Jianing

(reporter Li Tingting) in winter, haze has become the primary problem for people to travel. Now, there are various kinds of pm2.5-proof masks on the market. Can you really prevent haze by wearing this kind of mask

in order to explore the protective effect of anti haze masks, recently, Beijing News cooperated with “Zhidian” Laboratory of China Academy of home appliances to test 26 types of adult masks and 14 types of children’s masks, mainly to test the filtration effect of mask samples on particulate pollutants

the experimental results show that about 50% of the 26 adult masks have average filtering effect, and many masks have slightly poor facial fit, resulting in nasal air leakage and poor protection effect, including the recently popular “star mask”, which has poor protection effect. According to the experimental results, the PM2.5 respirator with breathing valve or face protector has better filtering effect on particulate pollutants

at the same time, the experimental results of children’s anti haze masks show that about 80% of the 14 children’s masks fail to achieve the claimed effect

experts remind that when choosing masks, you should not only pay attention to “face value”. At present, many products on the market pursue novelty and exaggerate design, but the actual filtering effect is not good. 1t’s better to choose professional PM2.5 protective mask


experiment location: Zhidian laboratory, China Academy of home appliances

experimental samples: 26 types of adult masks, including 3M, green shield, millet, medical masks and other common brands, were prepared through drugstores, e-commerce, purchasing agents and other channels; 14 kinds of children’s masks, including Xingyan, Sanyuan, totobobo, etc.

1. The PM2.5 blocking rate of the “star of the same type” mask is less than 60%

experimental process: the cigarette was ignited in a closed test environment to simulate the particulate pollution in the air; When the concentration of particulate matter in the air reaches about 400 μ g / m3, the detection starts

in the experiment, a simulation head model was used, and an air extraction pipe was set at the nose. After wearing the mask, the wearing effect was checked, and the filtering effect was tested

after wearing the mask to the headform, power on the evaluation equipment, that is, start to filter the inhaled air, and the filtered air enters the closed equipment simulating the lung through the hose for detection; A laser haze detector is placed in the device, which can display the pollution index of particulate matter filtered into the “lungs”

at the same time, another laser haze detector is placed beside the equipment to detect the particulate matter pollution index in the normal air environment for comparison. Observe for about 10 minutes, and compare the data changes of the two haze meters

experimental results: when the PM2.5 particulate pollutant index in the air is 350-360 μ g / m3, the blocking rate of particulate pollutants is 75% – 99% after wearing the “3M” brand ear mask with breathing valve; The blocking rate of disposable activated carbon mask and disposable medical mask was 20% ~ 45%” The blocking rate of “Green Shield” and other brands of cotton ear mask is 50% ~ 60%

experimental analysis: according to the introduction of experimental technicians, the national standard test is to stick the mask on the test equipment, which completely avoids air leakage. This kind of test environment cannot appear in real life. 1n this experiment, an anti haze mask test method is designed to simulate human face, which can simulate the actual wearing effect of human body to the maximum extent, so as to better reflect the filtering effect of human real breathing environment

the results of this experiment show that the better filtering effect of PM2.5 is concentrated in the haze masks with breathing valve or face protection, while the filtering effect of disposable masks and cotton masks is relatively poor. Among them, the recently popular star mask “Pitta mask” brand has no publicity protection effect, and the blocking rate of PM2.5 particulate pollutants is no more than 60%< About 80% of children's anti haze masks have poor "anti haze" effect experimental process: the detection method is the same as above, but the above adult head model is replaced by children’s head model, and the head circumference is 50cm according to the standard table of children’s height, weight and head circumference, 50cm is about the head circumference of children about 5 years old experimental results: the experiment showed that in the simulated severe pollution weather conditions (pm2.5400-500 μ g / m3), only three of the 14 children’s masks had a blocking rate of more than 75%; The blocking rate of the other 11 masks ranged from 52% to 72%, accounting for about 80% of the total samples the mask with the best protective effect can reduce the inhalation PM2.5 to 15 μ g / m3, and the blocking rate can reach more than 97% experimental analysis: according to the introduction of experimental technicians, generally speaking, the protective effect of children’s masks on the market is not ideal, and about 80% of the tested samples have low blocking rate of particulate pollutants. At the same time, it is not the more expensive the better. For some imported masks with a single price of more than 100 yuan, the blocking rate of particulate pollutants is less than 60% (Note: the results of the comparative experiment are only responsible for the purchased samples, which does not represent the product quality of other specifications, models and batches of the brand) tips some “children’s masks” are not specially designed for children it is understood that the national standard “technical specifications for daily protective masks” has been implemented since November 1, The standard stipulates that the mask can reduce the concentration of inhaled fine particles to less than 75 micrograms per cubic meter after wearing. However, there is no national standard for children’s masks through this evaluation, about 80% of the 14 children’s masks can not achieve the ideal effect of anti haze. According to home appliance research experts, children’s breathing rhythm and breathing volume caused by their activities are quite different from adults. Whether their breathing is smooth and whether they have a feeling of suffocation determines whether children are willing to wear this mask; When the mask is uncomfortable, it may open the gap, which will lose the significance of filtering the expert said that from the experimental results, the effect of children’s masks has no direct relationship with the price and brand. At the same time, some products are not specially designed for children, and businesses claim to be suitable for children in order to sell them; Some of the masks designed for children also have many aspects that need to be improved it’s a gimmick to claim that “adsorbing” PM2.5 masks can the “PM2.5 masks” on the market completely filter PM2.5? 1n this regard, according to the above home appliance research experts, we often say that PM2.5 is the pollution particles with a diameter of less than or equal t2.5 microns. At present, there is no mask specially developed for anti haze, so the product “PM2.5 mask” does not exist” PM2.5 mask “is just a general term for masks that can filter PM2.5 for the filtering mode, the mask that can filter PM2.5 needs a kind of filter screen, whose aperture is smaller tha2.5 μ m to block PM2.5 particles out. 1n other words, the mask plays its physical filtering mechanism. 1t is unreasonable to say that a certain filter element used in the mask can absorb PM2.5, or eliminate PM2.5 by chemical means. Therefore, the mask that claims to “absorb” or “eliminate” PM2.5 is mostly a gimmick tips first of all, you should choose a mask according to your own face shape. The better the fit between the mask and the face, the better the protective effect it is difficult to have both haze prevention and comfort. Generally, the higher the filtering effect is, the worse the comfort is; 1t is suggested to buy a respirator with breathing valve to reduce the feeling of suffocation you can buy from regular channels, e-commerce, drugstores, supermarkets, convenience stores, etc try to choose the mask with nose clip, the nose is bulging, and the nose clip can solve the problem of nose air leakage don’t blindly believe in the star effect or foreign brands. Some masks are not designed to prevent PM2.5 and can’t have protective effect

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