The dust concentration is different in the different dust environment, the use time of each person is different, the dust holding capacity of various dust masks is different, and the maintenance methods are different, which all affect the service life of disposable masks Therefore, there is no way to jointly request detailed replacement time. When the other parts of the dust mask are damaged, split and lost (such as nose clip, nose clip pad), and the breathing resistance is obviously increased, the entire mask should be discarded.
Before use, you should carefully check whether the disposable masks and face masks are still intact. Regarding the gauze masks and face masks, you can adopt the light transmission method, that is, take a look in front of the lamp to see if there are obvious light spots. The center part and the edge part are transparent. Is the luminous rate common? If in doubt, replace the new one. In any case, face masks and masks are generally updated after cleaning 3 to 7 times, and the common sense of disposable masks of particularly good quality can be cleaned 10 times. Activated carbon adsorption masks should pay attention to replacing the activated carbon interlayer on time. Assuming that the activated carbon interlayer cannot be replaced, it should be replaced after 7 to 14 days. This type of mask cannot be reused after cleaning.
When trying on a disposable mask, you can slightly twist your hands and five fingers together and buckle them on the left and right ends of the mask for deep inhalation. If the disposable mask is tightly sucked around the face, it indicates that the mask has excellent adhesion. It needs to be adjusted again. If the disposable mask still leaks after repeated adjustments, indicate that the ¡°size¡± of the mask does not fit the shape of the face. Although some masks have the same degree of protection, the materials are different, and then the prices are different. Cheng Zhenshun reminded that masks are not as expensive as possible. The materials are suitable for one's own skin and are comfortable to wear.
The outer layer of disposable masks tends to accumulate a lot of dust, bacteria and other dirt in the outside air, while the inner layer blocks the exhaled bacteria and saliva. Therefore, the double-sided cannot be used instead, otherwise the outer layer infected dirt When it is directly attached to the face, it is inhaled into the body and becomes a source of infection. When the disposable mask is not worn, it should be folded and put into a clean envelope, and the side close to the disposable mouth and nose should be folded inside. Do not put it in your pocket or hang it around your neck.