Medical Devices equipment  must first start with the principle. Whether it is a medical mask or an N95 dust mask, the filtering principle is to pass the barrier layer (made of polypropylene meltblown fiber) in the inhaled air through the mask interlayer. Dust, bacteria, viruses, etc.) are intercepted and adsorbed to prevent users from inhaling harmful particles.

　　In addition to fiber interception, electret treatment is generally performed on the barrier layer of the mask to slightly charge the barrier layer, actively adsorb particles, and enhance the filtering effect.

The barrier layer of a mask is equivalent to a large net. Therefore, even if the hygiene of the mask is not considered, if the mesh of this large net is blocked by various particles and the mesh is filled to a certain limit, there is not enough air to come in. When we wear it, we will have difficulty breathing, and this mask will naturally be unusable.

　　 Warm and humid masks are also a good environment for bacteria to grow. Considering that the masks are soiled by saliva and nasal mucus, deformed and damaged after long-term use, which affects air tightness, in principle, masks cannot be used for a long time.

　　The only difference is that ordinary medical masks have a short lifespan (about 4 hours) and N95 masks have a long lifespan (about 8 hours).

However, for low-risk personnel (non-medical personnel, not in contact with patients, not in Hubei), Zhang Liubo, the chief expert and researcher of disinfection at the China Centers for Disease Control and Prevention, suggested that during the period of shortage of masks, if the masks are not stained, they can be reused after they are naturally dried. Not washable.

　　 The National Institute of Occupational Safety and Health (NIOSH) also mentioned that N95 masks can be worn up to 5 times when they are fully functional and uncontaminated.

　　 Some studies have shown that the filtration efficiency of N95 masks after 5 days of use is still 80%.

　　Kaen Disposable mattress Manufacturer believes that, but now in a very period of time, it is estimated that everyone will not be at ease without disinfection