Mask is a sanitary and epidemic prevention product, which is usually worn on the nose and mouth to filter the air entering the nose and mouth to block harmful gases, smells, droplets, viruses and other substances. It is made of gauze or paper. Masks have a certain filtering effect on the air entering the lungs, and wearing masks when working in polluted environments such as dust has a very good effect.
Masks can be divided into air filtration masks and air supply masks. ? On 2002114, the State Council Press Office held a press conference to introduce 224.2 billion masks exported by China in 2020. On February 1 1, the General Administration of Market Supervision and other four departments jointly deployed and deployed again to strengthen the quality supervision of masks.
A brief history of development:
The appearance of the concept of air hazard in 2065 438+03pm 2.5 has aroused the public's concern about air pollution, and also made protective equipment such as masks sell well during the foggy weather.
On February 7th, 2020, in the Disinfection Supply Center of the Second Affiliated Hospital of Xi Jiaotong University, more than 30 medical staff and volunteers made masks with medical packaging non-woven fabrics, absorbent paper for instruments, N95 meltblown filter cloth and other materials.