Can your mask protect against new coronavirus? Net red mask filtration performance is only 16.5%

Medicine Network February 7th, your mask can protect against the new coronavirus? Net red mask filtration performance of only 16.5% in the face of the new crown pneumonia epidemic, wearing a mask has become one of the important personal protection methods.
And now a variety of mask products, many are said to have antibacterial, haze, safety and other effects, and even steam heating masks and other functions, many people buy for daily protection, then these products, can meet the new crown protection standards? Net red fabric mask particle filtration performance of only 16.5% of reporters with online purchase of a variety of masks, came to the National Textile Quality Supervision and Inspection Center's laboratory, in accordance with the standards of the delivery mask, a mesh red elastic fabric mask particle filtration performance testing.
National Textile Quality Supervision and Inspection Center project leader Huang Cong: Now we are using sodium chloride saline aerosol, and then to test, and then this test aerosol particle size, is 0.075 microns of a particle size, it is simulated in the daily air of this particle size to test.
detection machine passes air containing aerosol particles through the mask, some of which are blocked by the mask, and the aerosols that cannot be blocked pass through the mask, simulating access to the human respiratory system.
National Textile Products Quality Supervision and Inspection Center project leader Huang Cong: filtration efficiency is now 16.5%, and then this filtration efficiency is relatively poor, this filtration efficiency means that only more than 10% of aerosol particles are blocked, and then more than 80% of aerosol particles are through this fabric mask fabric, it can only prevent some daily pollen, some dust particles ah, some particles large particles.
on another mask outer packaging, marked with steam heating function, experts have also identified its protective effect.
National Textile Quality Supervision and Inspection Center project leader Huang Cong: It is actually mainly an iron powder, including activated carbon, it is mainly adsorption of odor of an effect, as well as the effect of heat, its filtration effect can almost be said to be non-existent, it can not prevent some small particles of filters.
how to block the new crown virus in the ordinary mask can not meet the needs of the new crown virus protection, medical masks thus into everyone's vision, has become an indispensable daily necessities.
, how does this thin layer of medical mask help us block the new coronavirus? Labeling disposable medical masks and medical surgical masks on the outer packaging of products needs to meet dozens of standards such as particle filtration efficiency, bacterial filtration efficiency, synthetic blood penetration, fabric flame retardant, poor gas exchange pressure, and even nasal clip length.
these two masks are widely used in the new coronavirus prevention and control scenarios, but neither product laboratory testing standards mention the filtration efficiency of the virus.
so can medical masks be used for the prevention and control of the new coronary pneumonia virus? Wang Baojun, director of the National Textile Products Quality Supervision and Inspection Center: Because of this virus, it cannot exist alone, it must be parasitic on an object, material, such as my particles, or our saliva droplets.
We sneeze, then if we carry the virus, it's on our saliva droplets, and this mask blocks the droplet particles, blocking them and actually blocking the virus."
disposable medical masks and medical surgical masks are generally very thin, why can effectively block small particles? Wang Baojun, director of the National Textile Products Quality Supervision and Inspection Center: If we are just trying to prevent this particulate matter from inhaling, it is very simple, we use a lot of other things, I make it very dense, very thick not on the line? It can achieve this effect.
, but we have trouble breathing.
we have to reach a level where we can both block the particles and block the bacteria, and we can't breathe too much.
actually spray nonwovens with molten spray, especially to achieve this effect.
it this breathability is better, in the production and processing, and finally put it in the pole, the pole on it added electrodes.
we have some fine particles or something, and it's adsorbed in itself, so it's such a function.
experiment verified the electrostectrical adsorption effect of the molten spray cloth In order to better observe the electrostectrical adsorption effect of the molten spray cloth, the expert disassembled a medical surgical mask on the spot and demonstrated an experiment to the reporter.
National Textile Products Quality Supervision and Inspection Center Director Wang Baojun: normal medical mask outside and inside is our regular nonwovens, generally imitation cotton nonwovens, its role is actually wrapped inside the molten spray.
cut open, we can see that this is our outside is a colored, this is a imitation cotton nonwovens, very thin.
is also a nonwoven, very thin.
this layer, is the fuse spray non-woven fuse, its strength is generally relatively low, a little drag it off.
because this molten cloth is static, so we put this small piece of paper.
you cut it, give it a try.
to see, adsorption of a lot of pieces of paper.
use this static electricity, and then the particles adsorption, so that the filtration efficiency is relatively high.
experts to the reporter brought a variety of mask fabrics to carry out one-by-one experiments, whether it is ordinary non-woven fabrics, or mesh red elastic fabric masks, do not have static adsorption function.
to buy medical masks need to identify the technical standard number in the face of a full range of mask products, from materials to functions, there are large differences.
so when we buy, how do we choose a mask for everyday protection against new coronavirus? Experts said that disposable medical mask products need to comply with the Chinese pharmaceutical industry standards YY0969 "one-time use of medical masks" indicators;
protection of the mask involves particle filtration, fit, nose clamp standard and other factors.
therefore, when purchasing masks for routine protection against new crown pneumonia outbreaks, you need to see the standard number in order to maximize the guarantee of the purchase of masks to play a role in the protection of new crown pneumonia.
Baojun, director of the National Textile Products Quality Supervision and Inspection Center: It must have a production approval number, in addition to a standard number, it is in the end according to which standard to produce.
If there is no standard number, this word as far as possible do not buy, although it may also be able to meet this requirement, but it does not have a standard number, you are difficult to judge, so it is preferred to be more formal, label more formal this mask.