Mask is a kind of sanitary product, which is generally used to filter the air entering the mouth and nose by wearing it on the mouth and nose, so as to block harmful gases, smells and droplets from entering and leaving the mouth and nose of the wearer. It is made of gauze or paper, etc.
Masks have a certain filtering effect on the air entering the lungs. When respiratory infectious diseases are prevalent, and when working in dust and other polluted environment, wearing masks has a very good effect.
At present, there are three kinds of medical masks in China: the "medical protective mask" with the highest protection level, the "medical surgical mask" commonly used in the operating room and other invasive operating environment, and the "disposable medical mask" with the common level.
Medical surgical mask
Comfortable to wear, generally used in medical outpatient, laboratory, operating room and other high demand environment, high safety factor.
(1) Filtration efficiency: under the condition of air flow rate (30 ± 2) l / min, the filtration efficiency of sodium chloride aerosol with aerodynamic median diameter (0.24 ± 0.06) μ m is not less than 30%;
(2) Bacterial filtration efficiency: under specified conditions, the filtration efficiency of Staphylococcus aureus aerosol with an average particle diameter of (3 ± 0.3) μ m shall not be less than 95%;
(3) Respiratory resistance: under the condition of filtration efficiency flow, the inspiratory resistance shall not exceed 49pa, and the expiratory resistance shall not exceed 29.4pa.
General grade medical mask medical nursing mask
Ordinary medical masks have many names, and those without the words "protection" and "surgery" on the name are all ordinary medical masks, which are not required to have a barrier effect on blood and have no requirements for tightness, so they are only used in ordinary medical environment. Most of the common medical masks are ear mounted, and their appearance is similar to that of ear mounted surgical masks.
This product is suitable for disposable medical surgical masks worn by clinical medical personnel in the process of invasive operation, which can provide protection for the patients who have been treated and the medical personnel who have carried out the invasive operation, and prevent the spread of blood, body fluids and splashes.
It is applicable to those worn by medical personnel in the process of invasive operation, to provide protection for the patients under treatment and the medical personnel or relevant personnel carrying out the invasive operation, to prevent the spread of blood, body fluids and splashes.
The medical mask is composed of mask body and tension belt. The mask body is divided into three layers: inner, middle and outer. The inner layer is ordinary sanitary gauze, the middle layer is ultra-fine polypropylene fiber melt blown material layer, and the outer layer is non-woven cloth or polypropylene melt blown material layer. It is divided into disposable non-woven cloth mask, gauze mask and special anti- mask.