Which gas mask is better? Some knowledge points of masks

Which is better for a gas mask? There are two key parameters for a mask. (1) Filtration efficiency; (2) Face matching. When exhaling, if the filtration efficiency is not high enough, it is necessary to consider matching with the face shape. Say exhale, because the purpose of designing masks is based on active protection (doctors, patients with respiratory diseases, etc. pathogens or sources of pollution). The basic principle is to intercept large particles and diffuse small particles. The average person's breathing is about 10-30 liters per minute, and when the manufacturer tests the mask, it uses a flux of 84 liters per minute to test the interception ability of the standard corresponding mask. Moreover, the particle concentration inside and outside the mask is tested by fitting.

Which gas mask is better? Small sized droplets with virus are useless. Even if it's too thick to breathe, it's very inefficient. For the exhalation of pathogens, the patient wears a surgical mask, and the diffusion radius of the droplets is about 15-30 cm, while the diffusion radius of a general mask is about 68 cm. Although N95 masks are effective, how do patients who have difficulty breathing wear them? Many people wear masks and neglect to keep a distance, but keeping a distance is much more important.

Which one is better?? The number of doctors and nurses who wear cloth masks infected with respiratory diseases is 13 times that of wearing a surgical mask! Cloth masks have no protective effect on medical staff. Surgical masks mainly block viruses with large particle sizes, have different filtration efficiencies, and are ventilated vertically, so their protection against medical treatment is limited. The working principle of N95 is to filter the air containing harmful substances through the filter material of the mask before inhaling or exhaling. It can effectively filter and purify inhaled abnormal odors (except toxic gases), and help reduce the exposure level of some inhalable microbial particles (such as mold, anthrax bacillus, tuberculosis bacillus, etc.). ), but does not eliminate the risk of exposure to infection, illness or death.

Which is better? Surgical masks do not form a seal with the face if the virus is transmitted by inhalation. Airflow follows the path of least resistance, allowing entry from the sides, if not through the mesh. There is no evidence that surgical masks protect against these tiny aerosols. Even N95 masks involve the matching of face shapes. Non-professionals often don't wear N95 masks correctly. Even if there is, people who are not used to wearing masks for a long time will often unconsciously increase the movement of touching their faces due to various facial discomforts, which greatly increases the risk of direct infection.

The above are some knowledge points about anti-virus masks. I hope you can study and understand the relevant knowledge carefully. I hope you can study carefully Understand relevant knowledge, choose products and equipment suitable for your needs, and ensure your own benefits. If you want to know more details, you can contact us. I believe we can give you a satisfactory answer.