1, 3M mask: 3M company is the inventor of particulate matter protective mask. In the United States from 65438 to the early 1970s, 3M Company pioneered a dust mask made of a new particulate filter material in the world, which covered the nose area of the crowd and was widely used to protect all kinds of workers exposed to high-concentration dust at work. In the following 40 years, it continued to study particle protection technology, and designed and produced a wide variety of protective masks with different functions.
2. Honeywell masks: Honeywell is one of the largest manufacturers of safety equipment in the world, and the masks it produces are also very famous. However, there are few models of masks produced by Honeywell, and the most famous one is Honeywell H90 1 mask.
3. Simeijia mask: Simeijia mask is of good quality, independently packaged and hygienic. Except that the activated carbon layer has a little taste, there is no peculiar smell, and the packaging is very good. The filtering effect is good.
4. Green shield mask: Green shield mask is a new generation of antibacterial and dustproof mask developed by Shanghai Xingnuo Kanglun Technology. At present, it has the patent authorization of domestic PM2.5 mask, and its patented PM2.5 technology can prevent particles with particle size less than or equal to 2.5 microns. Green shield masks are currently available in adult and children's models, which can provide healthy and all-round outdoor protection for family members! Children under three years old and children with low vital capacity or sleeping are not allowed to wear masks.
5. Stable masks: Stable masks and replaceable filter masks are the representatives of masks that meet the new national standards.
Related information:
At present, masks must conform to GB2626-2006 standard, and dust masks are divided into three grades: KN 100, KN95 and KN90. Among them, the protective effect of KN 100 on ultrafine dust can reach nearly100% (more than 99.97%). If the particle size is large, you can choose KN95 grade.
The protective effect of dust mask depends on two aspects. One is the filtration efficiency of cotton filter. The second is the tightness of the mask and the face.
Therefore, masks must be divided into different sizes, and the fitting effect of masks with different sizes and different faces varies from person to person.
Methods of cleaning dust: Scientific selection of dust masks certified by GB2626-2006 is helpful to prevent lung injury.
1, select the composite half mask type. Disposable masks have a high air leakage rate and are not suitable for long-term or occupational protection.
2. Choose KN 100 dustproof filter cotton for use. Low protection rate will lead to physical injury.
3, the choice of silicone material is more comfortable. Suitable for long-term wear, not easy to cause allergic reactions. A mask with high hardness is easy to cause facial depression.
4. The size of the mask is extremely important. Don't buy those so-called universal masks. Easy to leak.
The mask covers the nose and mouth, and covers the nose, mouth and chin. Suggest using the latter, which is relatively comfortable.
6. It is recommended to choose a mask with smooth breathing. Some masks are designed with double filter cotton, and the filter cotton has two sides, which makes the mask breathe relatively smoothly.