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As the haze weather became more and more serious, the 3m mask almost became a must-have configuration for people to go out. The quality of 3m masks is still very famous in the industry. There are many models of 3m masks, and the scope of application is very wide. How to choose 3m masks ? Xiaobian is here to give you a brief introduction. Friends who need it can refer to it.
Do you know how to choose a 3m mask ?
1. If you are working in a large amount of non-oily dust (cement ash and rock dust), I suggest you use the R95 or R100 series of masks, 8246 8247 or if you want to be more high-end, you can recommend 6200. The half mask, with the filter box, is even better~~.
2, dust masks are available in a variety of ways, must be selected for different job requirements and working conditions. The choice should first be based on the concentration and toxicity of the dust. According to GB/T18664 "Selection, Use and Maintenance of Respiratory Protective Products", as a half mask, all dust masks are suitable for environments where the concentration of hazardous substances does not exceed 10 times the occupational exposure limit, otherwise a full face or degree of protection should be used. Higher respirator. If the particulate matter is highly toxic, carcinogenic, and radioactive, the filter material with the highest filtration efficiency should be selected. If the particles are oily, be sure to select the appropriate filter material. If the particles are acicular fibers, such as slag wool, asbestos, fiberglass, etc., since the dust mask cannot be washed, the mask with the fine fibers is likely to cause facial irritation on the face sealing portion, and is not suitable for use.
3. For high temperature and high humidity environment, it is more comfortable to choose a mask with exhalation valve. The mask that can be used for ozone removal can provide additional protection, but if the ozone concentration is higher than 10 times occupational health standard, the mask can be replaced. Dust and poison combination filter elements. For environments where there are no particulate matter and only some odors are present, choosing a dust mask with activated carbon layer is much lighter than wearing a gas mask, as in some laboratory environments, but due to national standards, technical specifications are not required for such masks. It is best to try it first when you choose, to determine whether it can effectively filter the odor.
Whether the dust mask is really protective, in addition to the choice of protection, another important factor is suitability. There is no one-size-fits-all design that fits everyone's face. At present, the certification test of the dust mask does not guarantee that the mask is suitable for each specific user. If there is a leak, the airborne pollutants will enter the breathing zone from the leak. The method of selecting a suitable mask is to use a suitability test which utilizes the taste of the person to produce a bitter or sweet granule with a special tool.
How to choose 3m masks is introduced here, there are too many models of 3m masks, you can choose the corresponding mask according to different occasions.
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