Classification of masks. I have to say that the mask market is in chaos and there are a wide variety of mask products. The key is that salesmen who don't understand anything also come up with a few professional words that pretend to be forced, just want to kill every minute! According to the purpose and effect of masks, they can be classified as follows. It is time to increase knowledge.
I have to say that the mask market is in chaos and there are a wide variety of mask products. The key is that salesmen who don't understand anything also come up with a few professional words that pretend to be forced, just want to kill every minute!
Classification of 1. masks
There are so many common masks that everyone often sees!
1. cotton mask: The main function is to prevent cold and warm, to avoid cold air directly stimulate the respiratory tract. Please remember,Cotton mask dust sterilization effect almost no! That is to say, smoggy days and eggs, I mean no matter how expensive.
2. Flat MaskCan be effective against bacteria,Only to prevent the infection of germs caused by that spray.For example, it can prevent the spread of germs caused by sneezing. itsPoor fit, limited dustproof effect.
The inner layer of the plane mask with activated carbon, sterilization effect is more
3. Protective masks:Effective dust and bacteria preventionGenerally, it is cup-shaped and can be effectively attached to the nose and mouth, so as to achieve the dustproof effect. Remember, this is.Anti-smog masks necessary for home!
Protective mask without breathing valve
Protective mask with breathing valve
4. Other masks: Typical examples such as star masks, protective half masks, gas masks, etc., are not commonly used!
Stars with masks, poor protection efficiency to burst! You're probably wearing a fake mask
Antivirus half mask, want to get the effect! Professional
My mask, pig nose gas mask, is immune to all poisons.
2. the ones below are much worse,Professional terminology, do not understand please directly look at the big black characters!
filtration efficiency: The ability of the filter element to filter particulate matter, expressed in percentage, is divided into grade I, II and III. PopularThe higher the filtration efficiency, the better the effect.
KN、KP: National standard filter elements are divided into KN and KP according to filtration performance,KN class is only suitable for filtering non-oily particles, KP class is suitable for filtering oily and non-oily particles.In other words, KP is better than KN, and of course the price is higher.
Standard GB 2626-2006, Self-priming Filter Type Anti-particulate Respirator for Respiratory Protective Equipment
The figures in the above table refer to filtration efficiency, taking KN95 as an example:
KN95 refers to a filter element (mask) that filters non-oily particles and has a filtration efficiency greater than or equal to 95%.
protective effect: The ability of the mask to block particulate matter, expressed as a percentage.The filtration efficiency only refers to the core part of the mask-the filtering effect of the filter cloth material, and does not represent the protective effect of the mask, because the mask also has the problem of sealing.That is, the filtering effect of the filter cloth really reaches 99%, but if the sealing is not good, the protective effect of the mask will be much worse.
The protective effect of masks is divided into grade A, grade B, grade C and grade D from high to low. The ambient air quality applicable to each level of masks is as follows (this is very important!). All levels of masks should be able to reduce the concentration of inhaled particulate matter (PM2.5) to ≤ 75 μg/m3 (air quality index category good or above) in the corresponding air pollution environment.
Source: Technical Specification for Daily Protective Masks GB/T32610-2016
Three, how to choose a mask to prevent smog
given earlierSome Common Sense:
1. Only protective masks can effectively prevent smog, flat, cotton or anything!
2. No air leakage. It is better not to wear a mask with air leakage!
3. With a breathing valve, it is more comfortable. Under the condition of good sealing, KN100 has the best filtering effect but the most expensive.
The higher the protective performance, the greater the impact on comfort performance.
Should be purchasedAttention to the problem:
First of all, if you can buy some of the larger brands of masks, such as 3M, Honeywell (Honeywell), UVEX (UVX), heavy pine, etc. of course the best.
Secondly,The mask purchased must have the certification of the General Administration of Production Safety for this protective equipment (LA certification).
Then look for the protective label, KN100 is more expensive, choose KN95 is better, after all, the filter index is higher. (For children's shoes with insufficient silver, wearing KN90 is also better than not wearing them ~); The general haze contains both non-oily particles (the majority) and oily particles (mainly automobile exhaust). As for the individual choice of KP or KN(KP will be more expensive), it can be done according to the demand and silver ~
Finally, check the mask anti-counterfeiting logo, determined to be genuine, when wearing a mask, please pay attention to completely close to the face to wear tight, metal strip fit the radian of the face and nose. Attach demo video yohttp://Mp.weixin.qq.com/s/iy95_JPpI1SwjjB4A19ecA
To everyoneA little experience:
1. The sealing effect of the head-mounted mask is better than that of the ear belt type, but it is troublesome to wear fried chicken,Suggested earband.
２. It is recommended to buy a protective mask with a breathing valve, small resistance, easy to use, higher force!
3. European and American masks represented by 3M, Honeywell and UVEX have good results, but friends all say that their face is small and this mask is too big. In contrast, Chai Jing's Japanese heavy pine mask with Xiao is really good, and the effect is good and suitable for Asians.
Japan heavy pine mask model DD11V N95
4. a few points of attention
1. The higher the protective performance of the mask, the greater the respiratory resistance, the wearer needs to spend more force to achieve gas exchange, soIt is not recommended to wear the mask continuously for more than two hours..
2. For the old, weak, sick, disabled and other special groups with cardiopulmonary function problems, it is necessary to be careful to wear masks. Whether they can be worn is recommended to follow the doctor's advice.
3. The problem of mask use time, because the use time is related to many factors such as wearing time, air pollution degree, filtration efficiency, etc.Objective feeling When the breathing resistance of the mask becomes greater or the mask becomes dark.
At the end of the article, the editor wants to say that friends who smoke should not spend too much effort on masks before giving up smoking! Also, the price of masks is a bit too high recently... Blue thin shiitake!
The above answer is providedEarly environmental protectionProvided.
