Wear a mask to prevent haze? That’s your wishful thinking

1t’s true that the anti haze mask can’t stop PM2.5, and the anti haze mask is one of the most effective methods. However, many netizens are dubious about the function of the anti haze mask. So, is anti haze mask useful? The reporter decided to verify it in person


the reporter randomly bought seven masks with different styles and materials, but the outer packaging of the masks was marked with “haze prevention”, “PM2.5 filtration” and other words. Then, the reporter took seven samples to the school of materials science and engineering, Beijing 1nstitute of fashion, and used TS1 particle detector to detect the particle concentration

the inspector first measures the PM2.5 value in the room with the instrument, then covers the metal probe of the instrument tightly with a mask, and compares the change of PM2.5 value after 2 minutes. The test results showed that the barrier rate of 7 samples of masks and the filter materials used exceeded 90%

however, it is far from enough to block haze only by materials. The key lies in the design of masks. When the experiment was repeated, the inspector added a funnel which was more suitable for human breathing on the barrier material, and fixed it with a rubber band to simulate the state of wearing the mask on the face. After repeated testing, it was found that some masks in the 7 samples were designed with adjustable space in consideration of the differences of human facial structure, and the barrier efficiency was relatively high, up to 80%; However, the fit between some masks and face is not enough, and the barrier rate is only 36%< [Conclusion] it seems that the anti haze mask is difficult to prevent haze, which is true. 1n addition, experts said that the mask anti haze is a physical barrier, even if the mask barrier effect is very good, it can only work on mild haze, when the haze is serious, the mask alone can not achieve effective protection this article is a reprint of 1nternet media, which only represents the author’s point of view and has nothing to do with this website. 1f the information column articles and comments violate your legal rights, please call to let us know and we will deal with them in time

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