Originally published as Is medical protective suit a one-off? For more information on protective suit, see here. As of 09:34 am Beijing time on April 2, the number of confirmed cases of COVID-19 in the world has exceeded 930,000, with a total of 46621 deaths, and the daily number of new cases of COVID-19 outside China far exceeds the number of new cured cases. Affected by this, the news of the shortage of medical protective masks, medical protective suit and other materials abroad has been coming, and the shortage of medical protective suit has become the heart disease of hospitals for patients with novel coronavirus infection, and one of the largest production bases of this product in China is in Xiantao City, Hubei Province. Medical protective suit is a broad concept, including all kinds of clothing worn by medical staff in the medical environment, such as daily work clothes, surgical gowns, isolation clothes and protective suit, etc. Next, we will give you a detailed analysis of the various knowledge of medical protective suit. Classification of medical protective suit. The function of medical protective suit is to isolate germs, harmful superfine dust, acidic and alkaline solutions, electromagnetic radiation, etc., to ensure the safety of personnel and to keep the environment clean. Depending on the application environment and function,KN95 Mask for Epidemic Prevention and Control, medical protective suit have different standard levels for liquid and bacterial infiltration, and the materials used are also different. According to the basic function, it can be roughly divided into two types: reusable type and disposable type (disposable). Reusable protective suit needs to be washed and disinfected after each use, which is inconvenient to operate, greatly limits its weaving structure, and its protective performance decreases after a period of use. In view of this, protective suit made of disposable non-woven (non-woven) materials are gradually used in the world. This kind of protective suit, after further anti-bacterial, anti-static and other treatments,Virus Prevention Mask 3 Ply with Earloop, has similar hand feeling and performance with traditional textiles, and its price is lower. Therefore, it is widely used in isolation clothing and protective suit in the medical field. Medical protective suit Production Material Type Protective suit have different properties because of their different raw materials. At present, the nonwovens used in several medical protective suit being sold and developed in the domestic market are mainly as follows: Expand the full text Medical protective suit production proces For the main production equipment of protective suit, the following diagram is more appropriate. Medical protective suit are usually designed with a closed placket, that is, the inner zipper is closed and the outer placket is bonded, which can make the fit closer besides better wearing and taking off. In order to make the medical protective suit fit better, the cuffs, ankles and hats are all designed with elastic closing, which aims to strengthen the protective suit and prevent dust or liquid from entering the interior when it is matched with other protective articles. In addition, in order to facilitate movement and work and provide better flexibility for wearing, the waist of the protective suit is usually tightened by elastic rubber to increase work efficiency and use safety. Among them, sewing, zipper, Full Body Disposable Coverall ,KN95 Mask with Fast Shipping, Velcro, elastic and other processes are basically completed by the lockstitch sewing machine. The work of closing sleeves, trouser legs and hat edges is done by the overlock sewing machine. In addition to the above designs, in order to enable the protective suit to achieve higher sealing performance, after the protective suit is sewn, all stitches and pinholes in the protective suit need to be sealed by glue through a glue press, so as to prevent dust or liquid from entering from the sewn pinholes and enhance the isolation performance and use safety of the protective suit. The cost will also increase. Standard for medical protective suit. Medical protective suit have corresponding standards in various countries and regions, but there are some differences. At present, the international standards are the NFPA standard of the United States and the EN standard of the European Union. The medical protective suit standard in the United States is "NFPA 1999:2018" formulated by NFPA (National Fire Protection Association), which is applicable to medical first aid, while the standard in the European Union is "EN14126-2003" formulated by CEN (European Committee for Standardization), which is applicable to the protection of bacteria, blood and microorganisms. In China, the corresponding standard of medical protective suit is the national standard of the People's Republic of China GB 19082-2009 Technical Requirements for Medical Disposable protective suit, which has the following main performance indicators: Structure and appearance The protective suit consists of a hooded jacket and trousers and can be divided into a one-piece structure and a split-body structure. The protective suit shall be dry, clean and free of mildew, and the surface shall be free of adhesion, cracks, holes and other defects; the connection parts of the protective suit can be processed by needle bonding or heat sealing, the needle eye of the needle shall be sealed, the needle spacing shall be 8-14 needles per 3cm, and the stitches shall be uniform and straight without skipped stitches; The processed parts such as bonding or heat sealing shall be smooth, sealed and free of bubbles. The zipper of the protective suit with zipper shall not be exposed, and the pull head shall be self-locking. These appearance regulations are to ensure the safety and reliability of protective suit and to prevent minor defects from threatening the lives of medical staff. Liquid barrier function In terms of water permeability, the hydrostatic pressure of the key parts of the protective suit (left and right front, left and right arms and back) shall not be less than 1.67 kPa (17 cm H2O), the synthetic blood penetration resistance of the protective suit shall not be less than 1.75 kPa, and the water level of the outer side of the protective suit shall not be lower than Grade 3. These are to prevent the patient's body fluids, surgical disinfectants or irrigants from endangering the medical staff through the protective suit. filtering performance The filtration efficiency of the materials and joints at the key parts of the protective suit to the non-oily particles shall not be less than 70? This indicator ensures that the protective suit is sensitive to viral vectors. The blocking effect of particles such as droplets and dust. Comfortable The moisture permeability of protective suit materials should not be less than 2500 G/ (m2 · d), which ensures the normal heat dissipation and perspiration of medical staff and reduces the discomfort caused by long-term wear. Microbial indicators Coliform bacteria, Pseudomonas aeruginosa, Staphylococcus aureus and hemolytic streptococcus shall not be detected in the protective suit, the total number of bacterial colonies shall not exceed 200 CFU/G, and the total number of fungal colonies shall not exceed 100 CFU/G. This indicator ensures that several disease organisms do not adhere to the surface of the protective suit. Taking function The breaking strength of the material at the key part of the protective suit shall not be less than 45 N, and the elongation at break shall not be less than 15? Electrification shall not be greater than 0.6 μC/piece, the electrostatic decay time shall not exceed 0.5 s, and the primary stimulation score shall not exceed 1 point. This index makes the protective suit meet the basic wearing needs. Ethylene oxide residue The residual ethylene oxide in the protective suit sterilized by ethylene oxide shall not exceed 10μg/G. This index specifies the residual amount of fungicide to avoid harm to medical staff. Among the above seven indicators, the second (liquid barrier function) and the third (filtering performance) are directly related to the protective effect, both of which achieve the purpose of protection by blocking the transmission of viruses. According to news reports, in some areas, medical staff have been infected. In order to ensure the effective protection of frontline health worker during the epidemic, we must do everything possible to ensure the supply of protective suit and other protective equipment to protect medical staff. At present, led by the Ministry of Finance, local governments have purchased a large number of medical protective suit in the international market to support frontline health worker. The classification standard of protective suit in China is the pharmaceutical industry standard of the People's Republic of China YY/T 1499-2016 "Liquid Barrier Performance and Classification of medical protective suit", which divides medical protective suit into four levels, the higher the level, the better the protective performance. Internationally, the European Union standard EN14126-2003 "protective suit-Performance Requirements and Test Methods for protective suit Against Infectious Sources" divides protective suit into six categories, and those marked with "B" letters are biochemical protective suit, which can be used for the protection of medical personnel; The American standard NFPA 1999:2018,free shipping disposable coverall, protective suit and Equipment for Emergency Medical Operations, specifies the protective suit and equipment in detail, but does not classify the medical protective suit. Return to Sohu to see more Responsible Editor:. zjyuan-group.com