Anti fog? Bad masks nowhere

Xiao Bian is a true northeastern person. For Xiao Bian, many times the weather in the north gives me a feeling of dryness and a lot of sand blowing. I always feel how dark this day is, especially in the past few years. Cities such as haze become more and more serious. In the days of haze, a kind of textile came into being under this kind of environment. It was a mask, so for Xiaobian personally, the mask market was a mixed bag and it was said that anti-fog and masks could not be able to Well filtered to the dust we ordinary consumers are not known. So is there a standard for a mask that we breathe in close contact?

In fact, many mask merchants in the market are fighting against the name of anti-PM2.5, but the protective effect is not ideal. In the future, these inferior masks will be difficult to find. The national standard of "Protective masks for daily protection" formulated by Jiangsu Province will be formally implemented on November 1 this year. It is learned that this is also China's first national standard for protective masks.

When smog pollution is severe, many people will wear anti-fog and smog masks. The price difference of PM2.5 protective masks on the market is much different. Usually, some ordinary tens of dollars are as high as a few hundred dollars. There is also no uniform standard. Many masks are called the name of anti-PM2.5, but the protection effect is not ideal. The quality supervision department of Jiangsu Province had conducted tests on products marked on the market as PM2.5 protective masks. The results showed that the filtration efficiency reached over 90% less than 50% of the total, and more than half of the products did not have effective dust control efficacy. . The confusion in the market for civil protective masks stems from the fact that the product has no standards to follow.

The national standard of "Protective Masks for Daily Practice", led by the Special Protection Products Quality Inspection Center of Jiangsu Province, will be formally implemented on November 1 this year. It is reported that this is also China's first national standard for protective masks. The director of the center, Lu Bing, said that there are two key indicators in the "Code": the protective effect on fine particles (PM2.5); the safety performance of wearing. The “Code” classifies the four levels of mask protection effectiveness according to the type of air quality , which are: Grade D applies to moderate (PM2.5 concentration ≤150 μg/m3) and below pollution, and Grade C applies to severe (PM2. (5) Concentrations below ≤ 250 μg/m3 and below, Class B applies to severe and below pollution (PM2.5 concentration ≤ 350 μg/m3), Grade A applies to severe pollution (PM2.5 concentration up to 500 μg/mL) cubic meter). No matter which grade of mask is used, the filtered air must meet excellent standards.

Many businesses will highlight the “filtering efficiency” of masks. However, quality inspection experts say that although the filtering efficiency is an important indicator of protective masks, if the masks have poor sealing performance, the filtering efficiency is high, and the final protective effect is still Will be greatly reduced. Therefore, in the “norm”, filtering efficiency is no longer used as the main evaluation index of a mask, and a protective effect that can better reflect the final effect is selected. After wearing the mask, the concentration of inhaled PM2.5 can be reduced to 75 micrograms per cubic meter, so that the quality of the filtered inhaled air reaches a good or above level, which is only acceptable. In addition, the “Specifications” also set forth clear requirements for safety indicators such as formaldehyde, PH value, and microbiology. Taking into account the safety of the wearer when walking, it is also stipulated that the visual field below the mask should not be lower than 60 degrees to avoid the mask arch design. High-impact wearer's sight.

Xiao Bian feels that it is the most important thing that allows us to breathe fresh air. Then we should take the protection of the environment as our ultimate goal when we are manufacturing against smog. Only when the environment is good can we enjoy good quality of life. So everyone starts with it and protects the environment ~~ even if it is a fresh air~~

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