1. A mask is a sanitary product. Generally speaking, it is worn on the nose and mouth to filter the air entering the nose and mouth, thus blocking harmful gases, smells, droplets, viruses and other substances. It is made of gauze or paper.
Second, the mask has a certain filtering effect on the air entering the lungs. Wearing a mask has a very good effect when respiratory infectious diseases are prevalent and working in polluted environments such as dust. Masks can be divided into air filtration masks and air supply masks.
China is the first country to use masks in the world. In ancient times, in order to prevent dust and respiratory pollution, people in the court began to cover their mouths and noses with scarves. For example, Li Shu said, "Cover your mouth, you are afraid of meeting someone." Mencius on Li Lou records: "If the calligraphy is impure, everyone will cover their noses.
April and February news 1 1, 20265438. In order to ensure that the people have a happy, peaceful, healthy and safe Spring Festival, on the eve of the Spring Festival, the General Administration of Market Supervision, the Ministry of Industry and Information Technology, the State-owned Assets Supervision and Administration Commission of the State Council and the State Administration of Pharmaceutical Products jointly issued a document, and then deployed to strengthen the quality supervision of masks, requiring all localities to pay equal attention to supervision and services, strengthen the control of production sources, pay attention to supervision and inspection in the circulation field, severely crack down on illegal activities such as manufacturing and selling fake and shoddy masks, and effectively protect consumers' rights and interests; Strengthen mask quality assistance, give play to brand leading role, and promote mask quality improvement.
The May Fourth Department requires all localities to attach great importance to it, earnestly enhance their sense of responsibility and mission, and take effective measures to provide safe epidemic prevention materials for the people, so as to serve the overall situation of promoting epidemic prevention and control and economic and social development.
Six, air filter mask is the most widely used in daily work. The structure of the air filter mask is divided into two parts, one is the mask body, which can be simply understood as the mask shelf; The other is the filter material part, including dust-proof filter cotton and gas-proof chemical filter box.