[Non-woven fabric] Not all masks can put smog

When the haze weather strikes, masks have become a must. The most common ordinary cotton, gauze masks, medical disposable non-woven masks, activated carbon masks and medical N95 masks on the market, to prevent smog, how to choose the correct mask? 　　1, ordinary cotton, gauze masks: almost PM2.5 There is no protective effect.　　2. Medical disposable non-woven masks: This kind of mask can block bacteria but not dust.　　3. Activated carbon mask: the effect of anti-particulate matter and haze is not good.　　4, N95 mask 　　N95 is not a specific product name, it is a mask classification according to the American standard. 'N' means that this mask can protect against non-oily particles, and '95' means that the filtration efficiency of this kind of mask is 95%. Masks that meet the N95 and KN95 standards can filter more than 95% of PM2.5 particles in the atmosphere, and can effectively block them from entering the respiratory tract. The correct wearing of anti-smog masks. The correct choice of anti-smog masks will also affect the protective effect. After wearing N95 masks, the metal strips on the masks should be pressed tightly to make the masks fit the face, and the breath of the masks should be simply tested. Tightness. Press the mask lightly and breathe deeply. The center of the mask should be slightly sunken when inhaling, and the gas should not leak from the edge of the mask when exhaling. Otherwise, the airtightness is insufficient, and the mask should be worn again or replaced. Do not reuse disposable masks. Many people use one mask for two or three days. As everyone knows, the outer layer of the mask often accumulates a lot of dust and bacteria in the outside air, while the inner layer blocks the exhaled bacteria and saliva. On the contrary, the more you use it, the more dirty it gets, so be careful not to confuse the two sides. If worn for a long time, the mask will be wetted by the exhaled heat or saliva, and its blocking effect will be greatly weakened, so it is recommended to replace it.　　Not everyone is suitable to use a mask.　　The higher the effect of the mask in filtering out suspended particles, the greater the respiratory resistance and the harder it will be to breathe. It is prone to hypoxia and chest tightness when worn for a long time. For example, N95 masks are not suitable for everyone. The elderly, children, pregnant women, people who are weak, or people with respiratory, cardiopulmonary, and cardiovascular diseases should wear it carefully. It is best to consult a professional doctor before use to avoid discomfort. Previous post: No more