In order to effectively protect the body, there are certain requirements for the specifications of masks, which must cover people's mouth and nose so that people can breathe freely. Generally speaking, the size of disposable medical masks for adults is mostly 18*9, while the size of disposable medical masks for children is 15*9. Disposable medical masks are made of non-woven fabrics. This material does not require weaving. It is made of some fibers that are glued together. Disposable medical masks can effectively prevent fine dust in the air, especially the blocking efficiency of inhalable dust below 2.5 microns, because dust of this particle size can directly enter the alveoli and cause great harm to the human body. Disposable medical masks block dust layer by layer when passing through the gauze, and the dust is absorbed by the gauze, allowing fresh air to enter the respiratory system. So it is necessary to wear a mask in smoky weather. The filter material is used for a dense filter layer to filter out particles and effectively block flies, blood, body fluids and secretions. The mask straps are two long strips that go through the holes on both sides of the mask. The nose clip is located in the upper center of the filter layer, between the dense layer and the filter layer. The material is a metal or metal-plastic composite, which has plasticity and strength, making it easy to seal the nose when worn. It can be said that disposable medical masks are good products to protect medical staff and patients from mutual infection, so production must meet the requirements so that the bacterial filtration efficiency can reach more than 95%, which is an important role of good disposable medical masks. A detailed explanation of the production materials of disposable medical masks. Disposable medical masks are composed of non-woven fabrics, meltblown filter fabrics, nose bridge strips, and mask straps (or rubber bands). It is composed of two layers of non-woven fabrics sandwiched by a layer of melt-blown filter fabrics that are folded and ultrasonically compounded. The shape of the mask should be correct, the shape should be intact, the surface should be neat, there should be no damage, stains, mildew and peculiar smell, it can cover the user's nose, mouth to the chin and ensure the airtightness of the mask. Disposable medical masks must be equipped with nose clips, which are made of bendable plastic materials. The length of the nose clip should not be less than 8.0cm. Mask straps should be easy to take and wear. The cracking strength at the connection point between each mask strap and the mask body should not be less than 10N. Disposable medical masks are general masks, that is, fiber masks. Its blocking principle is a mechanical blocking effect. Through layer-by-layer mechanical blocking, large particles can be blocked, but the diameter of less than 5 microns cannot be blocked. particles with such a small diameter like smog, this type of mask basically does not have any inhibitory effect. In addition, the breathing resistance is large, and it is easy to cause hypoxia and chest tightness. The use of inferior fabrics will cause skin discomfort if worn for a long time. Medical protective masks have excellent particle filtration performance and are suitable for work protection of medical personnel when they come into contact with patients with airborne and droplet transmission diseases; medical surgical masks have excellent waterproof function and particle filtration performance, suitable for surgery, laser treatment, barrier and Wear during dental or other medical operations, as well as air or droplet transmission diseases may be worn; while disposable medical masks have no requirements for waterproof function and particle filtration power, and are only suitable for blocking the exhalation of the operator's mouth and nasal cavity during general medical operations. pollutants. The types of non-woven fabrics in disposable medical masks are common, and the number of layers is more than three layers, which can block bacteria and dust, and can be used at one time, safe and reliable, without the risk of secondary infection. Here, the editor reminds all users not to hoard masks, but to buy and use them immediately, as masks will breed bacteria over time.
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