It s smog again, how useful are masks

Choosing the right mask can play an absolute role in protecting the smog in the air.

Under long-term haze, a large amount of haze will be inhaled into the respiratory system. Working under dust, a large amount of ultrafine dust collects into a slurry in the lungs. Whether it is cough, so-called dietary therapy or traditional Chinese medicine, it is impossible to expel the dust, otherwise, there will be no pneumoconiosis.

These slurries can cause fibrosis of the lung tissues in the lungs, which can be removed by lung lavage initially. In the later stage of pneumoconiosis, even if the lungs are washed, the dust that has entered the lung tissue cannot be removed. Therefore, pneumoconiosis is characterized by continuous progression and deterioration.

However, pneumoconiosis has the characteristics of being preventable and not treated**. It is recommended that all workers in dust environments must do a good job of respiratory protection.

Now protective masks must implement the GB2626-2006 standard. According to the national standard, the scientific name of the dust mask is a self-priming filtering anti-particulate matter respirator. According to the different protection objects, it is divided into two types: oil-proof particulate matter (oil smoke, oil mist and non-oily particulate matter) and non-oily particulate matter (dust, smoke, fog, microorganisms, etc.).

There are three grades of anti-fume masks: KP100, KP95 and KP90. Dust masks are divided into three grades: KN100, KN95 and KN90. Among them, KP100 and KN100 can achieve nearly 100% (more) protection effect against ultrafine dust.

According to the nature of the use of masks, there are also three types: disposable masks, compound half masks, and full face masks.

The protective effect of a mask depends on 2 aspects. One is the filtration efficiency of the filter cotton. The second is the air leakage rate after the mask is mated to the face.

Therefore, masks must be divided into large and small sizes, and the air leakage rate between masks and faces varies from person to person. The scientific selection of dust masks certified by the GB2626-2006 standard helps to prevent lung damage.

1. Choose a duplex half mask type. Disposable masks are not suitable for long-term or occupational protection due to the maximum allowable air leakage rate of 10%.

2. According to the environmental dust concentration, choose N90, N95, N100 dust masks. It is recommended to choose a KN100 grade dust mask.

3. Choose a silicone mask, which has a long service life, is soft and comfortable, and is not easy to allergies. Masks with high rigidity are prone to facial indentation.

4. Masks are divided into large and small sizes, which is extremely important. It is not recommended to buy those so-called universal models of masks, which are prone to air leakage.

5. There are two types of masks covering the mouth and nose, covering the mouth, nose and chin, and it is recommended to use the latter, which is relatively comfortable.

6. It is recommended to choose a breathing mask. Some masks are designed with double filter cotton + double filter surface, which is relatively smooth to breathe and has a long service life.

If you choose a dust mask to protect against smog in the above way, the role of the mask will be obvious. Those who say that masks don't work are mostly caused by the wrong choice of masks.

Psychological, and a little protective.