Original title: How are disposable medical masks made? How to disinfect? Today, let's talk about the production process of common disposable medical masks on the market, and the disinfection link that everyone is most concerned about at present-how to disinfect in the factory. One, at least three floors If you cut out the mask, you can see that there are at least three layers of non-woven fabrics, which are required by the production regulations, at least three layers. When we look at the inferior masks that have been exposed on the market, only one layer of non-woven fabric is used, which is the serious jerry-building of unscrupulous manufacturers.. 2. What is "non-woven fabric"? "Non-woven fabrics" (also called "non-woven fabrics") are named for the process by which they are made. They are not woven. All kinds of clothes we often wear, such as cotton, linen and silk, are always woven into shape little by little on the machine. Expand the full text There is also a kind of "needle-punched non-woven fabric," which is similar to the needle-punching method we use to make felt. There is no mention of knitting. It is to use N needles to constantly poke and poke, so that the cotton structure is tangled and solidified together, and then processed into such a flat layer of fabric, which can not meet the filtering requirements. This is not a precious material either. Grandpa and grandma went to participate in a health activity for the elderly, and most of the "environmentally friendly bags" they got were made of "non-woven fabrics.". Then why is there a shortage of masks after so many days? Because the market is in short supply.. As a disposable consumable More than one billion people across the country want to have a few people every day. All of a sudden, there is an explosive demand. In addition, the supply of raw materials is tight. The big manufacturing countries urgently resume work and rush to work day and night, but they can't supply for a while.. III. Merging three layers Such three layers of non-woven raw materials are stacked together through the production machine as shown in the figure below. Have you noticed the small horn in the upper left corner of this machine? There is a string of wire through the bell mouth and keeps sending it in. Four,Against Bacteria Breathable KN95 Face Mask, sew into the nose clip This depends on the second structure of the mask: the bendable metal wire on the upper part of the mask. When wearing, the nose clip should be pinched and fixed to the bridge of the nose, so that the mask can be worn tightly. Otherwise, without this structure, the air leakage of my flat nose is more serious, and the sealing is not tight, which affects the protective effect.. Let's take a look at a close-up,KN95 Face Mask with Five Layers, which is to match and convey the metal wire along one side of the non-woven fabric, and then roll the edge of the structure in the following picture, and then sew it up, and it's done. V. Overlapping part The main part of the mask is the layered structure shown in the picture below, which can be pulled open to completely cover the mouth and nose, and the big face is not afraid. The cross section of this laminated structure is so long that it needs a machine folding link. This is the mechanical design as shown in the figure below. There are three adjustable inclined planes, and a small bevel angle is set so that a large piece of non-woven fabric gradually narrows from left to right along these inclined planes to form a "folding structure.". Then there is a tabletting link to flatten the surface of the mask. VI. Cutting link Most of the individual cutting and hemming of masks are fully automatic without manual processing. And different masks have slight manufacturing differences, some are sewn edges, some are directly hot-pressed and glued, small details. What comes out is a separate main body of the mask. It's not over yet. There are still several steps ahead. VII. Blending and Pressing The picture below is the mask I bought. Pay attention to the edge of the mask. There is a non-woven fabric to reinforce and press the ear rope, so as not to tear it off. There are two large rolls of non-woven fabrics on the left and right, waiting to reinforce the edge of the mask. After one side is wrapped, it is immediately pressed flat and glued. At this time, the masks that had been cut out were linked together again. This is really the endless hatred since ancient times. So we still need a link to cut and reinforce the edge, 3 Ply Disposable Protective Face Mask ,Full Body Disposable Coverall, and make a clean break.. VIII. Hot-pressing and fixing the ear rope Adhesive is also needed on the edge of the mask. As shown in the picture below, the mechanical claw on this side sends the ear rope, and the adhesive on the other side fixes the ear rope on the mask. In this way, a flat mask is finished. After that, of course, we have to bring out our "manual quality inspection.". In the recent news of mask factories, we often see employees pulling ear ropes to test or tidy up masks. Some little cuties are worried about sterility. Don't worry, they have to be sent to disinfect and sterilize again. 9. Open type mask Before disinfection, let's look at the production of an open mask, which is common in anti-smog mask or with higher protective specifications, such as the kind with a breathing valve. The feeding in the picture below is very clear. There are five rolls of non-woven fabric on the right, which shows that there are five layers of structure. The orange turntable is the metal wire at the nose clip. The most important structure of the open-type mask is shown in the picture below. A whole piece of flat fabric is folded together through this V-shaped structure, and then cut into a single one. Then the production of edge cutting, sewing, reinforcing and ear sealing lines are almost the same, so I won't repeat them. 10. Disinfection and sterilization Speaking of non-woven fabrics, have you heard the old people complain that this kind of environmental protection bag is not strong, and it is easy to break if you use it several times? Fragile non-woven fabrics are generally not sterilized by high temperature, but by using ethylene oxide, a colorless gas, to kill bacteria, mold and fungi. After finding an animated demonstration, batches of masks were sent to the disinfection room, and then ethylene oxide gas was introduced (the yellow color in the picture below is for highlighting, in fact, it is colorless). After reaching a certain concentration, the disinfection process was completed. After that, air and nitrogen should be introduced into the disinfection room to dilute and remove ethylene oxide, and so on, until the residual amount of ethylene oxide on the surface of the mask reaches the standard. Like the medical supplies we wrote before, "Look at the fear aroused by the production of needles, that's my lost childhood.." and "Mom! I know how the factory rolls out the cotton swab! There are also medical bandages, sutures, surgical instruments and some items that are not resistant to high temperature sterilization, which can be sterilized by ethylene oxide. Individual seal and dozen seal The masks we buy usually have a single sealed package and a stack of plastic packages together. There is no difference between the advantages and disadvantages of these two kinds, depending on the amount you use. They are all packaged after disinfection. As long as they are manufactured by regular manufacturers, have clear production information and meet the use standards, they are all compliant. Is there a positive and negative mask? Some of the most common disposable medical masks are made of the same front and back materials, and some are divided into front and back. The front material will look thicker, prevent some liquid splashing, and be more durable. The middle layer is the filter element, and the veneer layer is softer. The general way to distinguish is to see which side the ear rope is facing, and the side with the ear rope is the side that fits the face. Reuse masks? Everyone wants to throw away the mask after using it once, but there is no way to buy it. I am also a serious epidemic area here. Masks are simply out of stock,Medical Full Body Coverall, and now every household in the community can only go out once a day to purchase daily necessities. Now we can only try to reduce unnecessary outings and save the number of times we use masks.. Proofreading: Cast + Jiang Xiaomu Screenshot: Brother Yang The Gif in this article is excerpted from The MAKING video (97) " (61)" of The Science Channel in Japan. Horizonal respirator mask making machine by YouTube blogger Hengyao ultrasonic, YouTube blogger SAHTECH Consortium Safety and Health Technology Center's "CSB Film California Ethylene Oxide Plant Explosion Accident" video footage of the disinfection link modeling demonstration, as well as the mask I bought. WE ARE MORE PROFESSIONAL IN DESIGN back to Sohu to see more Responsible Editor:. zjyuan-group.com