Quality inspection of standard masks

Appearance inspection is a simple and intuitive method for testing the quality of masks By visual observation, check if the mask is intact, undamaged, free from contamination, and odorless A qualified mask should have no obvious damage, deformation, contamination, or other issues

1、 Appearance inspection:

Appearance inspection is a simple and intuitive method for testing the quality of masks. By visual observation, check whether the mask is intact, undamaged, free of pollution, and odorless. A qualified mask should have no obvious damage, deformation, contamination, or other issues.

2、 Filtering efficiency test:

Filtering efficiency is one of the important indicators for measuring the protective performance of masks. The common testing method is to use particulate matter for filtration efficiency testing. During testing, the particulate matter solution is sprayed onto the mask and the number and size of particles penetrating the mask are detected through specific equipment. Qualified masks should have high filtration efficiency and be able to effectively filter out small particles such as bacteria, viruses, etc.

3、 Respiratory resistance test:

The respiratory resistance of a mask refers to the resistance applied to the respiratory tract during breathing. Excessive respiratory resistance can cause difficulty breathing for users, affecting comfort and wearing time. The common testing method is to measure the pressure drop of the mask at different flow rates through specific equipment, in order to calculate the respiratory resistance. A qualified mask should have low respiratory resistance to ensure that the user can breathe easily.

4、 Synthetic blood permeability test:

The synthetic blood permeability test evaluates the ability of masks to penetrate blood. This test simulates the possible occurrence of blood splashing and is used to evaluate the protective performance of masks. During testing, spray synthetic blood onto the mask and observe for any blood penetration. A qualified mask should have high blood permeability and be able to effectively block the penetration of blood.

5、 Bacterial filtration efficiency test:

Bacterial filtration efficiency testing is an indicator for evaluating the ability of masks to filter bacteria. During testing, the bacterial suspension is sprayed onto the mask and the number and size of bacteria penetrating the mask are detected through specific equipment. Qualified masks should have high bacterial filtration efficiency, which can effectively filter bacteria and reduce the risk of cross infection.

6、 Tightness testing:

Tightness testing is a method of evaluating whether there is air leakage between a mask and the face. During testing, the user wears a mask and engages in activities or breathing under specific conditions, using specific equipment to detect any air leaks between the mask and the face. A qualified mask should be tightly fitted to the face to reduce air leakage and ensure effective protection.

Mask quality testing is an important means to ensure the quality and protective effect of masks. The quality and performance of masks can be evaluated through methods such as visual inspection, filtration efficiency testing, respiratory resistance testing, synthetic blood permeability testing, bacterial filtration efficiency testing, and tightness testing. When purchasing and using masks, consumers should choose masks that have undergone strict testing and are qualified to ensure their own health and safety. At the same time, relevant departments should strengthen supervision of the mask market to ensure the quality and compliance of mask products.