How big is the role of medical disposable face masks

With the further reduction of temperature, North China has gradually entered autumn. This season is also prone to dust and sandy weather, the air quality is poor, and the citizens have worn masks when they go out. It is reported that mask sales have been very large in the past spring and autumn In terms of Taobao's sales per day, 30,000 masks can be sold in one day.

However, according to experts, even medical disposable masks have limited capabilities for "PM2.5", not to mention those fancy fashion masks. So, how effective are the masks produced by the manufacturers? Mask companies don't just publicize in the future, go to a professional laboratory for testing first.

Yesterday, the Open Laboratory of Beijing Medical Device Inspection Institute was opened, and a number of internationally-standard laboratories such as biochemical reference laboratories and medical radiotherapy product testing laboratories were newly built. It is worth mentioning that there are also some close to the citizens Life laboratory, such as mask adhesion laboratory, dental materials laboratory, etc. However, the inspection laboratory currently accepts inspection commissions from enterprises or units, and has not been opened to the public.

Recently, the number of people who bought masks has soared. Taobao sold 20,000 masks to Beijing residents in one day. But what kind of mask to choose depends on the person and the application. According to Song Lianyou, deputy director of the equipment department of the Municipal Medical Equipment Inspection Institute, hard masks are suitable for use in dusty mining areas, cement plants, etc. There are different types of masks, which are suitable for users who do not need them. If it is used to block inhalable particles from entering the body, a disposable medical mask is sufficient. He said: "Medical masks are mainly targeted at respirable particulate matter above PM3, but have less effect on respirable particulate matter below PM2.5. In foggy days, it is more suitable for sensitive people to wear medical masks." He also said Cotton masks have limited protection, and the main function is to keep warm.

Song Lianyou said that the tightness also affects the protective performance of the mask. There are four different types of masks, such as hard masks, ordinary cotton masks, medical masks, and fashion masks in the laboratory ’s mask-adhesion laboratory. During the experiment, the staff should wear a mask and perform experiments on a treadmill at normal pace, sprinting, fast running, jogging, etc. to check the tightness of the mask.