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Brief Introduction of medical protective suit and Testing Technology _ Fabric Emploi Plein temps

28 nov. 2022 à 2h42   Ingénierie   Saint-Louis   254 vues Référence: 88
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PE breathable film is made by blending LDPE/LLDPE polyethylene resin carrier with about 50% special calcium carbonate, extruding into film and directionally stretching to a certain ratio. As that polyethylene resin is a thermoplastic plastic material, the polyethylene resin can be stretch and crystallized unde certain conditions, the interface between the polymer and the calcium carbonate particles is peeled off dure stretching, winding pores or channels which are communicated with each other are formed around the calcium carbonate particles, and the pores and the channels endow the film with a ventilation (moisture) function, so that the environments on both sides of the film are communicated. (3) The action mechanism of gas permeable membrane A humidity gradient pressure difference is formed when the water vapor concentration on one side of the membrane is greater than the environment on the other side of the membrane. This provides the basic condition for gas (vapor) convection,KN95 Face Mask, and the humidity environment on both sides of the film tends to be relatively balanced due to the formation of convection. The breathable membrane is used as a water barrier membrane, which has a barrier effect on liquid. Because there are many paths in the membrane, the "length-diameter ratio" (L/D) value of the tortuous channel formed by the membrane is very large, which can be understood as capillary. Therefore, in the case of the same liquid (such as water) and the same pressure, as long as the liquid column height of the capillary is less than the length of the capillary, it can ensure that the liquid will not leak out. Expand the full text 3. Classification of medical protective suit. At present, the materials used in medical protective suit on the market are different, but no matter what kind of materials are used, they should meet the requirements of various indicators. Since SARS, various kinds of medical protective suit have emerged. However, according to the form of use, it can be roughly divided into reusable type and disposable type. (1) Reusable medical protective suit material Reusable types include: traditional woven fabrics made of natural fibers (cotton, hemp) and synthetic fibers (polyester, nylon) and their blends; high-density structural fabrics made of superfine filaments; laminated fabrics made by laminating microporous films and ordinary fabrics. Traditional woven fabric: a reusable woven fabric made of natural fibers (cotton, hemp) and synthetic fibers (polyester, nylon) and blends of the two. Traditional cotton surgical gown is still widely used because of its good comfort, but cotton fabric is easy to absorb pollutants and microorganisms in the air, and its good hygroscopicity becomes a favorable condition for the survival of microorganisms. In addition, cotton fabrics do not prevent the penetration of blood and other liquids. High-density fabric: High-count cotton yarn or other superfine synthetic filament is used to weave high-density fabric, so that the yarn gap becomes very small. The fabric has moisture permeability due to the capillary action of fibers, Medical Disposable Coverall ,Full Body Disposable Coverall, and has certain liquid penetration resistance after being finished by fluorocarbon,The whole set of protective suit is divided into 6 categories according to the protection performance, from type 1 to type 6, the smaller the number is, the higher the protection is; type 4 is the recommended medical requirement,Medical Quickly Delivery Antivirus Coverall, the type with (B) is biological protection, and generally the protective suit with type B is preferred. Above is about "the medical protective suit and the examination technology brief introduction" the content introduction, hoped may bring some help to you. Return to Sohu to see more Responsible Editor:. zjyuan-group.com

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