Three principles of surgical mask selection

1. Dust blocking efficiency of masks The dust blocking efficiency of a mask is based on its blocking efficiency for fine dust, especially for respirable dust below 5μm. 2. The closeness of the mask to the shape of the face When the shape of the mask is not close to the face, the dangerous objects in... read more

3M mask frequently asked questions and answers

1. How often do I need to change a 3M protective mask? Answer: As the use time of the anti-particulate mask increases, the filtered particulates will gradually block the filter material. The filtration efficiency will usually increase, but the breathing resistance will also increase. When the breath... read more

Questions and answers about smog and protective masks

Q: What kind of mask can prevent smog? A: The hazards of smog mainly come from the fine particulate matter, that is, the particulate matter suspended in the air with an aerodynamic particle size less than or equal to 2.5 microns. Choose professional particulate protective masks for effective protect... read more

What are the classifications of disposable masks

Disposable masks are divided into: disposable two-layer masks, disposable non-woven masks, disposable three-layer masks, and disposable activated carbon masks. 1. The disposable two-layer mask is made of two layers of 28 grams of non-woven fabric; the bridge of the nose is made of environmentally fr... read more

How to relieve non-medical symptoms caused by wearing daily masks for a long time

Wearing a mask correctly can effectively block the spread of droplets, protect yourself from being infected by others, and also an effective measure to protect others from being infected by yourself. Wearing masks for a long time will inevitably cause some "sequelae". Today we will take a look at ho... read more