Experts said that there are a large number of PM2.5 masks on the market, but the country has not yet set quality standards for PM2.5 masks. The market products are mixed and the quality is adulterated. And called on relevant departments to provide guidance from the macro level to ensure the development of industry norms.
Online shop selling PM2.5 masks into the tens of thousands
Miss Li has severe allergic rhinitis. When the seasons alternate, the air quality drops. Her nose can accurately issue an "alarm", and there are symptoms of nasal congestion and sneezing. At this time, she will buy a stack of masks for use. Recently, she found that many masks on the Internet claimed to block PM2.5 particles, which caused her interest. However, after Miss Li bought a 10 yuan PM2.5 mask, she still sneezed, which made her doubt the authenticity of the advertisement.
The reporter found in Taobao. Many masks claimed to be able to block "PM2.5". There are many well-known brands in the top ranking of sales, and some non-known small brands are also selling well. Many of these masks add a lot of "new concepts" to the traditional functions of warmth. Such as a price of 12 yuan mask used to use activated carbon in the interlayer, can be dust-proof, anti-bacteria, anti-formaldehyde, anti-secondhand smoke, and the "effective to prevent PM2.5 can enter the lung particles" description in a prominent position. Another "nose mask" with a price of more than 30 yuan is said to use a composite fiber nonwoven fabric with static electricity. The high-efficiency air filter material composed of melt-blown microfiber can achieve the effect of filtering PM2.5 particles. There is also a medical disposable mask, also known as the PM2.5 mask, which is the cheapest antibacterial product, and it is also very popular. At the same time, although some masks are not marked with the words PM2.5, most of the sellers claimed that the masks sold were thicker, the fabrics were good, and the dust and PM2.5 were well isolated.
A seller told reporters that the current sales of masks is four times that of summer, and the best selling is PM2.5 masks. "The same is to buy a mask, I heard that there are PM2.5 masks, naturally will choose better protection performance. Our most popular monthly sales of more than 3,000, has accumulated more than 30,000 sold." The seller also revealed At present, there are dozens of products for online masks, and there are more than 400 shops selling masks, among which the price of PM2.5 masks ranges from 1 yuan to 40 yuan. "The reason why so many shops are selling masks is because of good sales and high profits. Many customers buy five or six at a time, or even buy one box, and sell more than a thousand per month, which can earn 10,000 yuan."
PM2.5 masks have no civilian standards
The reporter's investigation found that many people have heard of PM2.5, but they don't know much about the specific meaning of PM2.5, and they don't know how to identify PM2.5 masks.
Ms. Qin, who works in the hospital, said that the medical mask she wears in her daily work is mainly for inhalable particulate matter above PM3, but she does not know much about PM2.5 products on the market. She only knows that the main function of activated carbon mask is to absorb odor, certainly not The protection effect to PM2.5. Mr. Wang, who is engaged in decoration work, said that he often used N95 masks. He heard that it has the effect of blocking PM2.5, but the air permeability is poor. It takes a long time to feel uncomfortable and certainly not suitable for daily life.
So, how do consumers identify the authenticity of a PM2.5 mask? What technical standards are there for domestic PM2.5 protection?
In this regard, Zhao Danqing, a professional of the China Antimicrobial Association, said that there is no quality standard for the civilian mask market. For the identification of PM2.5 masks, ordinary citizens can't identify them by hand or by eye. They must be judged in the laboratory with instruments. Most masks on the market do not achieve the effect of blocking PM2.5, because to block PM2.5, there are high requirements for technology. Take the most popular activated carbon mask on the market, the production process is to apply a layer of activated carbon powder on the filter material, can not filter PM2.5 particles, on the contrary, it is still a source of particles. The familiar N95 mask is positioned to provide professional protection for workers in the industrial field, such as working in harsh environments such as mines and chemical plants. The higher the degree of protection of such masks, the greater the resistance to normal breathing and the comfort of wearing. The degree will be worse. In addition, the protective effect of the mask itself is not equivalent to the final protective effect. If the mask and facial curve selected by the user are not very close, or the seal is not properly worn, the actual protective effect will also be affected.
Expert: Wearing should be "different from time to time"
As the public's awareness of health and environmental protection has increased, the requirements for masks have also increased day by day, from ordinary cotton masks to medical masks, industrial dust masks, PM2.5 masks... Is it necessary to wear PM2.5 in daily life? Mask?
Zhang Yingzeng, secretary-general of the China Antimicrobial Association, told reporters that PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 microns in the atmosphere, which can be directly into the human bronchial tubes, interfere with lung gas exchange, and trigger asthma, bronchitis and cardiovascular diseases. Disease. Another hazard of PM2.5 is that it is an important carrier of pathogenic microorganisms (such as SARS, H1N1, Legionella, etc.), which will help spread the disease.
According to statistics from the World Health Organization, there are currently about 52 million deaths worldwide each year, of which 33% are due to microbial-related diseases. Of course, because the body's own resistance can restore short-term cockroaches, the short-term PM2.5 environment will not cause serious damage to the body. Therefore, he suggested that in the autumn and winter, when the air is relatively dry and the content of PM2.5 in the air will be relatively high, the public can properly protect it, and try to reduce the risk of going out and drinking more water.
“Consumer antibacterial awareness is gradually strengthening. This is a good thing. However, there are a large number of pm2.5 masks on the market. Many companies have seen the business opportunities brought by PM2.5, but the products are mixed and consumers’ identification. Not strong, it is easy to spend money. "At the same time, he also called on relevant departments to provide guidance from the macro to ensure the development of industry norms.
(Editor: Xu Xiaoyu)
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