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Recently, PM2.5 (particulate matter with diameter of 2.5 micron or less) has become a major health hazard from the polluted air in many cities in China. The regular gauze masks are used to prevent inhaling the PM2.5 fine particles; however, those masks are not able to filter out the PM2.5 because of the large porosity of the mask materials.
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For the readers not familiar with particles size, PM 10 refers to particles smaller than 10 micrometer, and for PM 2.5, it refers to smaller than 2.5 micrometers. So, filtering out all the particulates smaller than " 0.1 microns (same as 0.1 micrometers)",...
Vova Men Fashion Black Mask Solid Color PM2.5 Gauze The dustproof mask can be used for anti dust, anti vehicle exhaust, anti pollen allergy, anti PM2.5 and haze day protection. Easy to wear and they provide a superior level of protection over the paper masks, and Very comfortable for long periods of time. Washable, can be repeatedly used.
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The most common and affordable mask are known that the 3M N95 masks (picture above is for the 3M 9501 model). Despite being very affordable (5 to 6 RMB a piece), the 3M N95 are always among the top performing masks for Particulate Matter (i.e. PM 2.5 Air Pollution). One of the great advantage for the 9501 model is to be foldable, so that you ...
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Nov 27, 2015 · The ‘2.5’ in PM 2.5 refers to the size of the pollutant in micrometers. Additionally, particulate pollutants vary in size and the smaller they are, the more damage they cause to your health. PM10 is particulates that have a diameter of 10 micrometers or less.
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1. Cover the protective mask with one hand and the side with the nose clip facing outward; 2. Put the protective mask on the nose, mouth and chin, and place the nose clip up against the device; 3. While covering your face, put on an earhook; 4.
Seller Rating: 94.7% positive2.The inner layer of activated carbon can filter harmful gases or odors.95% filtration, a 360-degree three dimensional breathing space，provide anti-bacterial and anti-dust protection for you. 3.Made of high quality material, safe, soft and comfortable，reduce skin irritation.
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People can get a false sense of security from flimsy gauze, and linger too long outdoors in toxic air, argue Wei Huang and Lidia Morawska. ... PM 2.5 is associated with more than 4 million deaths ...
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Mar 26, 2020 · For example, tests have found that tight-fitting six-layer gauze masks reduce contamination with tuberculosis bacilli by 90% to 95%. This is much more protection than you’d get wearing a mask made from a few layers of loose-fitting gauze. Surgical masks provide the wearer very little protection against viruses because they are so loose-fitting.
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13 days ago · Even as thousands of citizens are using handkerchiefs and cotton masks bought from street vendors to protect themselves from the coronavirus, doctors …
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