Do you know non-woven fabrics?

'Non-woven masks' commonly classified two-layer masks: non-woven fabrics, bridge of the nose, ear hooks. 3-layer mask: non-woven fabric, bridge of nose, ear hook, filter cotton (filter paper). Activated carbon mask: non-woven fabric, nose bridge, ear hook, filter cotton (filter paper), activated carbon cloth. Scope of application Two-layer mask is mainly used in food processing plants. There is no filter melt blown cloth in the middle, but two non-woven fabrics are stitched together. Its function is mainly to prevent oral substances from entering the food. The three-layer mask is the interlayer of the three-layer mask. The middle is a filter meltblown cloth, suitable for medical structures and outdoor, dust factory and other occasions. Activated carbon mask is suitable for occasions with stricter requirements on dust and bacteria. The selection method must follow the steps I said below. Smell, wear four times and look: see if the face is shiny, and if there is no broken hair. Second touch: feel the whole mask is soft and smooth, not rough. Three smell: smell if there is any peculiar smell, from the fabric surface to the ear straps. One smell and four wear: Wear it to see if your ears, nose and face are itchy. Use time Since it is a disposable mask, of course it cannot be reused, and pay attention to the time of using disposable masks. Generally speaking, use disposable masks. The mask needs to be replaced after 6-8 hours. Precautions 1. After wearing the mask, avoid frequent opening cover, which will reduce the protective effect of the mask; 2. After taking off the mask, put the mask in tape and paper bag and put it in a covered trash can Discard and wash your hands in time, do not reuse disposable masks; 3. Do not reuse the front and back of the disposable mask, because the outer layer of the mask will collect a lot of dust and bacteria from the outside. If you use the front and back alternately, the outer layer Pollutants will directly enter the oral cavity along the respiratory tract, affecting human health.