Single-use medical masks are the most common and most frequently used masks, how are such masks tested?
Single-use medical masks need to be tested for 11 indicators, including appearance, structure and size, nose clip, mask band, bacterial filtration efficiency, ventilation resistance, microbial indicators, ethylene oxide residue, cytotoxicity, etc.
Among them, the bacterial filtration efficiency test is to detect the isolation efficiency of the mask on bacteria; microbial indicators provide that coliforms, Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus hemolyticus and fungi shall not be detected; the mask band must be able to withstand a force greater than 10N, that is, to withstand the weight of a kilogram; according to the regulations, the mask pressure difference can not exceed 49Pa, the pressure difference will be too large to make the wearer stuffy, the smaller the pressure difference The smaller the pressure difference, the more comfortable to wear.
The tester entered the high-pressure safety zone, and two people implemented high-pressure operation together to test whether the 16 indicators of the protective clothing met the standard. She first tested the anti-static properties of the protective clothing, cutting out a square of the right size from the protective clothing, and alternating between high pressure and low pressure to test the amount of static electricity.
Testing microbial indicators is to prevent the microbial limit of the protective clothing from being exceeded, and the user being infected by bacteria and viruses on the protective clothing, which brings the risk of infection to the user and fails to play a protective role. This is a relatively important test indicator.
Detection of moisture permeability, because the user wears protective clothing is easy to sweat and produce water vapor, if not permeable to moisture, the body will be very uncomfortable; filtration efficiency test, the test is the key parts of the protective clothing materials and seams, the filtering efficiency of non-oily particles should be not less than 70%; flame retardant test is to detect in the environment with open fire, protective clothing can block combustion, to protect the user.
Of course, different standards of medical masks and protective clothing testing instruments are different, for you to recommend QINSUN instrument independent research and development production of several in line with international manufacturing standards specifically test masks, protective clothing instruments.