There are three types of masks, including disposable medical masks, medical surgical masks, and medical protective masks.

Masks are generally composed of meltblown cloth, non-woven fabric, mask tape, and nose clip. The outer and inner layers are made of non-woven fabric and the middle layer is made of meltblown fabric. The "melt-blown cloth" is commonly known as the "heart" of the mask. The fake mask is very thin. If there are only two layers inside and outside without a melt-blown cloth in the middle, it will not be able to play a role in blocking particles and bacteria.

Compared with ordinary masks, the outer layer of medical surgical masks has flame retardant properties, and at the same time, it must have the ability to prevent blood penetration to ensure the safety of medical personnel.So, what are the general procedures for testing masks?

Mask tape test：each mask has 4 welding points. It is required that the breaking strength of the joint between each mask root and the mask body should be not less than 10N. Each test lasts for 5 seconds.

Mask performance test: For the close-fitting test of the mask, ten volunteers are generally required to see if the mask nose fits properly. Volunteers will perform actions such as rocking left and right, nodding up and down, and testing for mask leaks. The staff put on a medical protective mask and entered the small room to test the tightness of the mask. The closed small room was filled with sodium chloride aerosol.

Waterproof test: Use 250ml of water to drip down. After all the leakage is finished, see how the mask is waterproof according to the standard.

Block blood performance test: Medical surgical masks and protective masks must not only be waterproof, but also blood-proof. The staff would use artificial blood to call from a distance to see if the other side of the mask came through. The main reason that a qualified mask can block blood is the meltblown cloth in the middle.

Finally, test the comfort performance of the mask.

GESTER international LTD. specializes in R & D and production of mask testing equipment, protective clothing testing equipment and medical products testing equipment. To learn more, contact us:info@gester-instruments.com.