How long does the efficacy of medical protective mask last?

The efficacy of the medical protective mask lasted for 4 hours. Most medical masks are made of one or more layers of non-woven fabrics. The main production processes include melt blowing, spunbonding, hot air or needle punching. They have the functions of resisting liquid, filtering particles and bacteria, and are a kind of medical protective textiles.

The medical mask consists of a mask body and a tension band. The mask body is divided into three layers: the inner layer is made of skin-friendly materials (ordinary sanitary gauze or non-woven fabric), the middle layer is made of isolation filter layer (ultra-fine polypropylene melt-blown material layer), and the outer layer is made of special material antibacterial layer (non-woven fabric or ultra-thin polypropylene melt-blown material layer).

Extended data:

The efficacy of medical masks:

Medical surgical masks are suitable for the basic protection of medical personnel or related personnel, as well as the protection against blood and body fluids from spreading and splashing during invasive operations. The protection level is moderate and it has certain respiratory protection performance. Mainly in the clean environment with cleanliness less than100000, working in the operating room, nursing patients with low immune function, and wearing them when performing body cavity puncture.

Medical surgical masks can block most bacteria and some viruses, prevent medical staff from being infected, and also prevent microorganisms carried by medical staff from being directly discharged, posing a threat to surgical patients. Medical surgical masks require a filtration efficiency of more than 95% for bacteria.

Disposable medical surgical masks should also be distributed to patients with suspicious respiratory tract to prevent infection threats to other hospital personnel and reduce the risk of cross infection, but the effect of avoiding infection is not as good as that of medical protective masks.

Ordinary medical masks are used to block the splashes exhaled by oral cavity and nasal cavity, and can be used for disposable health care in general medical environment, with the lowest protection level. Suitable for general health care activities, such as sanitary cleaning, liquid preparation, bed cleaning unit, etc. Or the barrier or protection of particles such as pollen other than pathogenic microorganisms.

Baidu encyclopedia-medical protective mask

Baidu encyclopedia-medical mask