Can a snoring mask really prevent it? Media measured 50 percent of the general effect!

The experimental samples included 26 adult population masks and 14 children's masks commonly found in the market, which mainly measure the filtering effect of particle masks on mask samples.

In the experiment, a simulation head mold was used. A suction duct was installed at the nose and the mask was put on. Then the wear effect was checked and the filter effect was tested. This version of photography / Beijing News reporter Wang Jianing

(Reporter Li Tingting) Into the winter, haze has become the primary problem for everyone to travel. Today, various anti-PM2.5 masks also appear on the market. Can this mask really prevent haze?

In order to explore the protective effect of a skull mask, the Beijing News recently cooperated with the “Zhidian” laboratory of the China Household Electrical Appliances Research Institute to detect 26 popular population masks and 14 children’s masks on the market, mainly to detect mask samples. Particle filter effect.

The experimental results show that among the 26 models of population hoods, about 50% of the masks have normal filtering effect, and many masks have slightly poorer facial fittings, resulting in leakage of the nose and poor protection effects, including the recently-acclaimed “Stars”. Masks, poor protection. From the results of the experimental comparison, it is still a good PM2.5 protective mask with a breathing valve or face protector for filtering particulate contaminants.

At the same time, children's anti-haze masks showed that about 80% of anti-fog children's masks out of the 14 children's masks did not achieve the declared effect.

Experts advise that when choosing a mask, do not just focus on the “value”. At present, many products on the market are pursuing new standards, and the design is more exaggerated, but the actual filtering effect is not good. When purchasing it is best to buy a professional PM2.5 protective mask.

experiment

Experimental location: “Zhidian” Laboratory of China Household Electrical Appliances Research Institute

Experimental samples: Through the pharmacy, e-commerce, purchasing and other channels, prepare 26 types of population cover, including 3M, green shield, millet, medical masks and other common brand masks, are common passive filter masks; 14 children's masks, including Research, 3D, Totobobo, etc.

1 Less than 60% blockage rate of PM2.5 masks

Experimental process: Light the cigarettes in a closed test environment and simulate airborne particulate matter to pollute the environment. When the concentration of particles in the air reaches about 400 μg/m3, start the test.

In the experiment, a simulation head model was used. An air suction pipe was installed at the nose and the mask was put on. Then the wear effect was checked and the filter effect was tested.

After wearing a mask on the head mold, the test equipment is powered on, which starts to filter the inhaled air. The filtered air passes through the hose and enters a closed device that simulates the lungs for detection. A laser measuring instrument is placed in the equipment and can be displayed. Filtered into the "pulmonary" particle pollution index.

At the same time, another laser measuring instrument was placed next to the device to detect the particulate pollution index in the normal air environment for comparison. Observe about 10 minutes and compare the data changes of the two radon meters.

Experimental results: The PM2.5 particle pollutant index in the air is in the 350-360 μg/m3 environment. After wearing “3M” branded ear-mounted masks with breathing valve, the particle contamination rate is 75%. ~99%; disposable activated carbon masks and disposable medical masks blocking rate of 20% to 45%; "Green Shield" and other brands of cotton ear-type masks blocking rate of 50% to 60%.

Experimental analysis: The experimental technician introduced that the national standard test is to stick the mask on the test equipment and completely avoid the air leakage. This kind of test environment cannot appear in real life. In this experiment, an anti-fog mask test method for simulating human faces was designed to simulate the effects of actual wear on the human body to the utmost, so that it can better reflect the filtering effect of the human body in a real respiratory environment.

The results of this experiment show that the PM2.5 filtering effect is better concentrated on the snorkel mask with respiratory valve or face protector, and the filtering effect of disposable mask and cotton mask is relatively poor. Among them, the recently-studded celebrity face mask "PITTA MASK" brand has no publicity protection effect, and the PM2.5 particulate contaminant rejection rate does not exceed 60%.

2 About 80% of children's anti-mite masks have a poor effect of “prevention”

Experimental procedure: The method of detection was the same as above except that the above-mentioned adult head mold was replaced with a child head mold and the head circumference was 50 cm.

According to the laboratory technician's introduction, according to the standards of children's height, weight, and head circumference, 50cm is probably the head circumference of a child about 5 years old.

Experimental results: The experiment showed that in the simulation of severely contaminated weather conditions (PM2.5 400-500 μg/m3), of the 14 children’s masks, only 3 children’s masks had a rejection rate of more than 75%; the other 11 masks The blocking rate of the sample is between 52% and 72%, accounting for about 80% of all samples.

Among them, the mask with the best protection effect can reduce the inhaled PM2.5 to 15 μg/m3 and the blocking rate to more than 97%.

Experimental analysis: According to the introduction of experimental technicians, overall, the protective effect of children's masks on the market is not satisfactory, and about 80 percent of the tested samples have a low particle blocking rate. At the same time, it is not as expensive as possible. Some imported masks with a price of more than 100 yuan each contain less than 60% of particle pollutants.

(Note: Comparing the experimental results is only responsible for the samples purchased, and does not represent the product quality of other specifications, models, batches of the brand)

prompt

Some "children's masks" are not designed specifically for children

It is understood that the "daily protective mask technical specifications" national standards have been implemented since November 1, the standard provides that after wearing a mask can be inhaled fine particulate matter concentration reduced to 75 micrograms per cubic meter is a qualified product. However, there is no national standard specifically for children's masks.

Through this evaluation, about 80% of 14 children's masks cannot achieve the desired antifogging effect. According to experts in home appliance research, children's activities cause breathing rhythm and respiratory rate are very different from adults, whether breathing is smooth, whether there is feeling of boredom, determines whether children are willing to wear this mask; may not wear comfortable Pull the mask out of the gap, which loses the sense of filtration.

The expert said that from the experimental results, there is no direct relationship between the effects and prices of children's masks and brands. At the same time, some products are not designed specifically for children. Businesses are known to be suitable for children for sale; some face masks designed for children also have many areas that cannot be considered and need improvement.

Declaring that "adsorption" of PM2.5 masks is mostly a taro

Is the current "PM2.5 mask" on the market really capable of completely filtering PM2.5? In this regard, the home appliance research experts described above, we often say that PM2.5 is less than or equal to 2.5 microns in diameter particulate pollution, and currently there is no mask is specifically developed for anti-fog and haze, so "PM2.5 mask" This product itself does not exist. "PM2.5 mask" is just a collective name for masks that can filter PM2.5.

For the filtration method, masks that can filter PM2.5 require a filter whose aperture is smaller than 2.5 microns and blocks PM2.5 particles out. That is to say, masks are played by its physical filtering mechanism. However, it is unreasonable to say that a certain kind of filter element used in a mask can absorb PM2.5 or eliminate PM2.5 by chemical means. Therefore, many masks that “adsorb” or “eliminate” PM2.5 are claimed. It is a girl.

Tips

First of all, choose the mask according to your face type. The better the mask and the face, the better the protection.

Anti-mite and comfort are difficult to have both, generally the higher the filter effect, the worse the comfort when wearing; it is recommended to buy a mask with a breathing valve, you can reduce the sense of boredom.

Purchase from formal channels, e-commerce self-employed, pharmacies, supermarkets, convenience stores, etc. can be assured choice.

Try to choose a mask with a nose clip. The nose is raised. A nose clip can solve the problem of nose leakage.

Do not blindly believe in celebrity effects or foreign brands. Some masks are not designed to prevent PM2.5 and do not provide protection.