Disposable masks are divided into two types: with exhalation valve and without exhalation valve. The filter and mask are integrated design. Due to the simple design, the air leakage rate is much higher than the other two. Usually 10%.
The duplex half mask is the mask body + filter element.
The overall tool is divided into three parts: the window mask, the inner small mask, and the filter element.
The way to clean dust: now dust masks must implement the GB2626-2006 standard. Dust masks are divided into three grades: KN100, KN95, and KN90. Among them, KN100 can achieve nearly 100% (above 99.97%) protection effect on ultrafine dust. If the particle size is large, KN95 grade can be used. The protective effect depends on two aspects. One is the filtration efficiency of the filter cotton. The second is the air leakage rate after the mask is matched with the face.
Therefore, masks must be divided into sizes, and the air leakage rates of masks and faces regardless of size vary from person to person.
The way to clean the dust: scientifically select dust masks certified by the GB2626-2006 standard to help prevent lung injury.
1. Select the duplex half mask type. Disposable masks are not suitable for long-term or occupational protection due to their high air leakage rate.
2. Select the KN100 level. High dust environment and low protection rate will cause bodily harm.
3. Choose the silicone material mask, which has a relatively long service life and is soft and comfortable. Wearing it for a long time is not easy to cause allergic reactions. Masks with high hardness are easy to cause facial indentation.
4. Masks are divided into sizes, which is extremely important. It is not recommended to buy those so-called universal masks, which are easy to leak.
5. There are two types of masks that cover the mouth and nose, and cover the mouth, nose and jaw. It is recommended to use the latter, which is relatively comfortable.
6. It is recommended to choose a smooth breathing mask. Some masks are designed with double filter cotton + double filter surface, which is relatively smooth for breathing and has a long service life.
Occupational protection is recommended to evaluate from the above quality, grade, comfort and economy, and choose a good mask that can effectively prevent pneumoconiosis.
