The production line of disposable medical masks is very simple. It is important to ensure the quality of masks at all levels. A mask will be produced quickly on the production line, but there are a lot of quality inspection procedures for the sake of quality. For example, medical protective masks with high protection level need to undergo 12 tests before they can be put on the market. The classification of masks is different, and the detection standards are also slightly different. The medical protective masks are of high level. It is necessary to carry out a number of tests, such as nose clip, mask belt, filtration efficiency, airflow resistance, synthetic blood penetration, surface moisture resistance, microbial indicators, etc. In the flame retardant performance tester of the mask, the staff put a mask on the headform and started the ignition of the machine. The head mold wearing the mask passed through a flame with a height of 40mm and an outer flame temperature of 800 ℃ at a speed of 60mm / s. the outer surface of the mask was slightly rolled up due to burning. The qualified medical surgical and protective masks should have flame retardant performance, and the continuous burning time of the fabric should not exceed 5 seconds after removing the flame under the specified laboratory conditions. Unqualified respirator, in serious cases, can produce a big flame, and the continuous burning time will be more than 5 seconds. The mask will also do the synthetic blood penetration experiment, and simulate the scene of blood splashing on the mask through the inspection equipment. The qualified product is that there is no blood penetration on the inner surface of the mask after this experiment. The stronger the tightness of the mask, the stronger the protective effect. Therefore, the tightness test is also an important part of mask quality inspection. The reporter saw that this test needs to select 10 different head types of 5 men and 5 women to carry out the tightness test. The tested personnel should simulate the movements of medical staff during work, and conduct data collection under different postures such as normal breathing, left and right head turning breathing, up and down head breathing. After 8 people have reached the standard, it can be judged that the tightness of this batch of products meets the requirements. According to the standard, some inspection items have strict time requirements. For example, it takes 7 days for microbial limit test and 48 hours for bacterial filtration efficiency test.