The role of medical masks

The role of medical masks, with the outbreak of the epidemic, now people's lives can not be separated from masks, masks can protect people, although people use masks every day, but there are still some people who do not understand the role of masks, the following describes the role of medical masks.

The role of medical masks 1 Common medical masks are multilayer protective masks composed of knitted fabrics, non-woven fabrics and filters, which belong to the technical field of protective equipment. It integrates air permeability and sealing, has the functions of moisture-proof, antibacterial and side leakage prevention, and solves the problems of sweating and sweltering caused by high temperature in summer. Among them, the non-woven fabric layer adopts nano-non-woven fabric to prevent and kill Legionella easily causing lung infection in the air. At the same time, it solves the problems of sweating, sultry and so on caused by the hot summer. The non-woven fabric layer is made of nano-non-woven fabric, which can prevent, kill and inhibit Legionella which is easy to cause pulmonary infection of Staphylococcus aureus and Mycobacterium tuberculosis in the air, and has the characteristics of washability, long-term effect and reusability.

1, pay attention to the expiration date of the medical mask. Dust masks have a certain period of validity. Even if it is never used, the filtering efficiency of its filtering materials will decrease with time, especially for medical masks. Medical masks that have passed the expiration date will not play a protective role if they are used carelessly, because the user's negligence can easily cause virus infection. Therefore, before using medical masks, be sure to confirm the production date and expiration date.

Be sure to wash your hands before and after wearing a mask. Be sure to wash your hands before wearing a mask, avoid touching the surface of the mask, and try to avoid touching the mask when using it, so as not to reduce the protection. Try not to touch the outside of the mask when you take it off, so as not to get bacteria on your hands. Be sure to wash your hands after you take it off.

3, masks should not be worn for a long time. In order to prevent infection, some people may wear medical masks all day long, but this will make the nasal mucosa fragile, lose the original physiological function of the nasal cavity, and reduce the resistance. Therefore, it is not necessary to wear masks in places with low population density and poor ventilation.

4. Don't put the mask directly in your pocket when not in use. When many people don't use masks, they just take them off and put them in their pockets or bags, and then take them out when necessary. This is very unsanitary. Be sure to fold it and put it in a clean sealed bag, with the side close to the nose and mouth folded inward. Moreover, it is best to change medical masks every day and not wear them alternately to prevent cross-infection.

The role of medical masks 2 Can medical masks prevent smog?

As the name implies, medical masks are mainly used by medical staff at work, which can effectively protect some germs and particles in the medical process. Mainly divided into the following three categories:

1, disposable medical masks, also known as medical surgical masks, are usually used in surgery and are blue flat masks. Disposable medical masks are divided into three layers, the outer layer is used to prevent blood or saliva from splashing, the middle layer mainly filters toxic substances such as germs, and the inner layer belongs to the moisture absorption layer, which effectively absorbs the water vapor generated during breathing.

2. Gauze masks account for 50% of the market and can usually be divided into six layers, twelve layers and eighteen layers. Gauze masks are all white, made of cotton embryo cloth, degreased and bleached. The mask is soft, odorless and tasteless, and has no impurities. After each use, it can be washed with soap and disinfected with disinfectant, and then reused.

3. Medical protective masks, the most professional protective masks in the medical industry, are the most effective protective masks for respiratory infectious diseases, and are widely used in the protection of SARS, avian influenza virus and Ebola virus. Medical protective masks are generally divided into three layers, the inner layer is non-woven, the middle layer is high-efficiency electrostatic meltblown layer, and the outer layer is ultra-thin polypropylene meltblown layer. The protective performance of medical protective masks against viruses and germs is remarkable. Most masks are maintenance-free and cannot be reused after cleaning.

Then, after learning about three different types of medical masks, let's talk about whether they can prevent pm2.5.

1. Disposable medical masks can't prevent pm2.5 This mask can effectively filter dust particles larger than 4 microns in diameter and protect blood germs. At present, the main domestic manufacturing standard is YY0469-20 1 1 technical requirements for medical surgical masks;

2. Gauze masks can't protect against pm2.5, but can only protect large-diameter particles, which is the worst protective mask among the three types of medical masks. At present, there is no relevant testing standard in China.

3. The medical protective mask can effectively prevent PM2.5, which meets the technical requirements of GB 19083-20 10, and can effectively filter dust particles and pathogenic microorganisms with a diameter less than 0.3 micron.

The role of medical masks 3 Do masks have to be disinfected?

Not necessarily.

Generally speaking, it is best to use sterile masks, because sterile masks are generally sterilized with ethylene oxide, and it takes 3- 14 days to be produced before they can be put on the market, so the protection effect will be better, and the spread of bacteria, viruses and droplets can be well avoided.

But not all occasions need to use sterile masks, because sterile masks are mainly used in ICU, operating room and other medical places. If you use it in ordinary places, you don't need to use a sterilized mask. Generally, a mask that is not sterilized can also be used.

Why are medical masks not disinfected?

Although there is a sterilization mask, the mask itself can't be sterilized, but it can only help shield bacteria and prevent bacteria from directly entering the human respiratory tract, causing human infection or inducing some diseases, even medical masks are the same. If you want to have bactericidal effect, you need to use some mold liquid medicine.

Can non-sterile masks be worn directly?

Yes

Because masks are divided into non-sterile masks and sterile masks, many people think that non-sterile masks cannot be used directly, but in fact, non-sterile masks can also be used directly. The difference between non-sterile masks and sterile masks lies in whether there is a final sterilization process for finished products, but other indicators such as filtration efficiency or airflow resistance are the same. Non-sterile masks are also managed in strict accordance with the measures for the management of medical devices. Safe enough to meet the protection needs of the daily public, it can be used directly, but it can't be used in a specific medical environment, otherwise it is easy to be infected, which is not conducive to human health.

What is a non-sterile mask

Non-sterilized masks refer to masks that have not been sterilized in the production process and have not gone through the final sterilization process. Simply put, it is an ordinary dust mask in life. Their focus is not to help the human body isolate bacteria, viruses and microorganisms, but to be used in smog and dusty weather that are common in life, and the protection level is relatively low.