3M is a brand in the United States, with a wide range of products. 3M masks are very popular in China, mainly due to the good filtering effect of 3M masks in various tests, which many young people prefer in winter. How about the anti haze effect of 3M masks? How long can a mask last?
How long can a 3M mask last
There is no strict limit on the use time of 3M mask. How long it is used depends on your operation. Different environmental particle concentration, particle properties, different use time of each person, different dust capacity of various particle masks, and different use and storage methods will affect the service life of the mask. Therefore, there is no way to specify the specific and unified method Replacement time. It is recommended to discard the whole mask and replace it with a new one when any part of the respirator is found damaged and the respiratory resistance is obviously increased, or it is considered that it is unsanitary to continue wearing.
However, please note that 3M masks are maintenance free, i.e. they cannot be cleaned, rather than used only once. Please keep it properly after each use. Once the mask is damaged, dirty inside or the respiratory resistance is too large, the mask can be replaced.
In addition, if it is a new mask, it is recommended to put it in the original packaging. If the used mask needs to be preserved, it is recommended to put it in a breathable bag, such as a clean paper bag.
3M masks are all made of high electrostatic filtration materials, which can filter particles and PM2.5 in the air. They can't be washed with water. Otherwise, the filtration ability of the materials will be damaged. At the same time, when the masks are used for a period of time, their filtration efficiency will be reduced to none. Generally, in the following cases, the dust mask should be discarded:
1. The particles absorbed by the mask are too high, and the user obviously feels that the breathing is blocked;
2. The parts are damaged, aged, damaged or invalid (such as the head belt is broken, loosened, nose clip is broken, falling off, the mask body is damaged, deformed, etc.);
3. The mask is polluted, such as liquid splashing.
Under normal circumstances, 3M dust mask can be used for one to two weeks, at most one week without valve mask and two weeks with valve mask. However, according to the pollution degree of specific environment, if the air pollution is serious, the use time will be shortened. The user shall change the mask in time according to the actual situation.
Can 3M mask prevent haze
According to the test of China Consumer Association, 37 kinds of mask products in China and more than 3m mask products are all rated with 5 stars, so it's a good choice for everyone.
With regard to how the general public can use the particle respirator to reduce the harm of air pollution (such as haze, PM2.5) in their daily living environment, in the absence of clear regulations, requirements and guidance from the government, the public needs to make a choice to meet their own needs based on the needs of individuals and information about relevant knowledge.
From a professional point of view, any type of particle respirator certified by a qualified official certification body according to authoritative standards can be used to protect PM2.5.
3M particle respirators can effectively reduce the exposure level of such particle air pollution under the premise of correct wearing and effective sealing.
For example: 3M 9002 (headband type, Kn90), 3M 9001 (ear band type, Kn90), 3M 9002v (headband type, with valve, Kn90), 3M 9502 (kn95), 3M 8205 (cup cover type, kn95), 3M 8210 (cup cover type kn95 / N95), 3M 9042 (Kn90 with odor reduction), 3M 8247 (cup cover type, R95 / kn95 with odor reduction), 3M 8577 (cup type, odor reduction, p95 / kp95, with valve) and other models are more suitable for the use of the general public. The specific model should be determined according to the use habits of the public, suitability, and whether it is necessary to prevent peculiar smell at the same time.