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3 Adsorption can be divided into two categories: physical adsorption and chemical adsorption. When the force between activated carbon molecules and pollutant molecules is van der Waals force, the adsorption process is called physical adsorption; when the force between activated carbon molecules and pollutant molecules is a chemical bond, it is called chemical adsorption. According to these properties and operating principles of activated carbon, it has anti-virus, deodorant, dust-proof and anti-bacterial effects. Especially suitable for the treatment of organic gases, acidic volatiles, sulfur dioxide and other gases. It can effectively oid dust below 5 microns and a variety of bacteria spread by the respiratory tract, which are not working with general masks. It can effectively isolate harmful gases such as benzene, ammonia, formaldehyde, odor, and malodor in the air to protect health. The KF94 mask machine is used for welding, no wiring is required, and the trouble of repeated wiring changes is eliminated. There is no disconnection under the traditional wiring method, and the fabric can be neatly cut and sealed. Sewing together also plays a decorative role and is very sticky. Folding mask machine is a process of hot pressing, folding forming, ultrasonic welding, waste removal, ear band and nose strip welding of multi-layer non-woven fabric into a mask with certain filtering function. The mask equipment is not a single machine, and it requires multiple machines to cooperate. Complete different processes. At present, the more popular mask equipment on the market include: non-woven fabric plane machine, N95 mask machine, 3M9001/9002 folding mask machine, duckbill mask machine, three-dimensional dust mask machine, etc.A。 The machinery industry itself is also facing the requirements of energy conservation and emission reduction, requiring machinery companies to adapt to this requirement in product design and manufacturing. This requires enterprises to accelerate industrial upgrading. According to the official website of the Korean Food Administration (MFDS), the KF94 mask is a standard set by the Korean manufacturing department, and its filtration efficiency for particles with a diameter of μm is higher than 94%. This means that the KF94 standard mask can filter out 94% of particles with a diameter equal to μm. Therefore, KF94 is similar to KN95 and N95. They are all mask types under the same protection level, but their protection capabilities are different. [1]. Special effects editor This standard can effectively prevent common poisons: droplets. The KF94 mask has a good filtering effect, can effectively prevent direct contact between droplets and the respiratory tract, and can effectively prevent the intrusion of poisons, playing a good anti-virus effect. However, because KF94 is not a standard substance, in the production process, there is no corresponding bacterial filtration rate standard. In addition, the outer layer is made of the same material as KN95 and N95 masks, and has poor splash resistance. Once droplets are stained, there is still danger if the mask is not replaced for a long time. Therefore, KF94 can play a role in personal protection when going out, but compared with KN95 level protective masks, the effect is slightly inferior. Currently, N95 and KN95 platforms are severely out of stock. A large number of Korean KF94 masks are said to be consistent with the N95 mask standard. Is this true? First, look at the definition of the standard. Standardized definition KF94: Korean standard, the filtration rate for particles with an erage diameter of μm is greater than 94%. According to the American standard, the diameter of the mask used to filter non-oily particles is above μm, and the filtration rate is greater than 95%. Comparison: The two standards are different. The US data comes from the American Institute of Occupational Safety and Health, and the South Korean data comes from its Food Administration (MFDS). The core problem of the KF94 data is prevention. Those who he checked the information know that the diameter of the poison. These masks can filter out the impurities of um at most, but the poison cannot exist in the air alone, but spreads on the droplets. The diameter of the droplets Obviously greater than, so as long as it can filter out droplets, it can basically prevent it, no matter whether it is kf94 or, it can be filtered out, so it can play a role in prevention. And leing the poison carrier, the survival time in the air is limited, and it is safer to wear a mask than without.