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pm | | Structural Analysis of Masks _ Core (16th Dec 22 at 2:30am UTC) | Quote Reply | | Original title: Structural Analysis of Masks Structure Analysis of Masks Basic structural analysis 01 Layers of ordinary masks Cut open a used medical mask, and you will find that the mask has three layers, the (inner) absorbent layer, the (middle) core filter layer, and the (outer) waterproof layer. Because according to the national production regulations, medical masks contain at least three layers of non-woven fabrics (N95 grade masks,free shipping disposable coverall, the structure has been optimized: (middle layer) core filter has more layers and thicker thickness). Deep structure analysis 02 Melt-blown nonwovens, the core of the mask Expand the full text Melt-blown fabric, commonly known as the "heart" of the mask,Full Body Disposable Coverall, is the filter layer in the middle of the mask, which can filter bacteria and prevent the spread of germs. Melt-blown nonwovens (melt-blown nonwovens) is a kind of film which is made of polypropylene with high melt index, and is laminated by many crisscross fibers in random directions. The diameter of the fibers ranges from 0.5 to 10 microns, and the diameter of the fibers is about one thirtieth of a hair. The reason why the mask machine can't make a mask is that the core material of the mask is melt-blown cloth. When you see the picture, do you worry about how to filter the virus in the environment when the gap of melt-blown fabric is so large? Although the size of the new coronavirus is very small, 3 Ply Disposable Protective Face Mask ,CE Certificate KN95 Mask, about 100 nanometers (0.1 microns), but the virus can not exist independently, its main transmission routes are secretions and sneezing droplets, the size of droplets is about 5 microns, this is one of them. Second, melt-blown cloth is essentially a fiber filter, and the droplets containing the virus are close to the melt-blown cloth. It will also be electrostatically adsorbed on the surface and can not be penetrated. Although the raw materials of S layer and M layer of masks are polypropylene special resin, there are great differences in production process and performance between melt-blown fabric special material and other non-woven fabric raw materials. Microscopic comparison of structure 03 Comparison of surgical mask and N95 mask. Comparing the cross-sectional views of N95 mask and surgical mask, it can be clearly seen from the SEM images that the thickness of melt-blown fabric of surgical mask is 156 microns, while the thickness of melt-blown fabric layer of N95 mask is 521 microns, which is three times that of surgical mask. Sectional view of medical surgical mask, taken by Feina desktop scanning electron microscope. Sectional view of N95 mask, taken by scanning electron microscope of Feiner bench According to professional analysts, as the domestic demand for masks, especially medical masks, is still relatively strong, there is a supply gap in the short term for melt-blown non-woven fabrics, but due to the gradual control of the epidemic outside Hubei Province,Medical Disposable Coverall, the demand for masks is expected to decline gradually, so the price will remain high in the short term, but the probability of a sharp rise is small. Prices of melt-blown nonwovens are expected to fall back to normal levels. Masks should not be a luxury in the end. WeChat ID: Hisense Jiangmen Air Conditioner Return to Sohu to see more Responsible Editor:. zjyuan-group.com | |
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