PM2.5 mask market mixed

Recently, the CCTV News Channel reported that problems such as cohabitation in the PM2.5 mask market, active use of activated carbon masks in the PM2.5 market, and mask protection against PM2.5 reached 99%. Through visiting and logging in to major shopping websites, it was found that masks bearing the name “PM2.5” were seen everywhere, and were divided into anti-particulate, anti-formaldehyde, anti-odor, and activated carbon models. . For protection principles, the claims vary.

It was found that most of the masks did not include the factory name and raw material components, and even the simplest packaging did not. Some low-cost chemical fiber masks with colorful cartoon prints on the front surface not only cannot protect PM2.5 but also have poor air permeability. In addition, synthetic fabrics can also stimulate the bronchus, causing skin allergies and unpleasant nose symptoms. However, some of the market's advanced technology and internationally-recognized PM2.5 mask sales are relatively high. Zhang Yingzeng, the secretary-general of the China Antibacterial Association, pointed out that the mask material, service life, and technical level are the criteria for defining the quality of masks. When consumers buy masks, they must be careful to choose and use the products verified by the relevant testing organizations.

Currently, many activated carbon masks on the market are also marked with the “protection of PM2.5” and are known to adsorb tiny particles in the air. Activated carbon masks are one of the most widely used types in our daily life. The production process is to apply a layer of activated carbon powder on the filter media. The principle of action is a simple physical activity adsorption. The CCTV news report pointed out that activated carbon masks can effectively adsorb harmful gases such as benzene and formaldehyde in the air, but they cannot achieve effective barrier effects for fine particles (not to mention PM2.5 particles). At the same time, activated carbon itself It is also a source of particulate matter and is likely to be inhaled by the wearer. This poses a hazard to persons suffering from chronic respiratory diseases or frailty. Generally, in life, activated carbon masks are mainly used for room decoration, odor deodorization, etc., and have no protection against PM2.5.

In the report of CCTV, there were mentions of domestic manufacturers claiming that the PM2.5 mask produced by them can achieve 99% protection. It is reported that the manufacturer of masks of the Green Shield brand Shanghai Xingnuo Kangnun Fiber Technology Co., Ltd., has the "Nilsson Laboratory" and "National Labor Protection Supplies Quality Supervision and Inspection Center" related to the Green Shield PM2.5 mask. Test certificate.

It is understood that the Nielsen Laboratory is a world-class air fluid laboratory, and is also the main certification body for Chinese respiratory protection products companies to enter the international market. The manufacturer also emphasized that the “99% filtration rate” referred to in the report is the filtration rate of PM2.5 tested by Nielsen's laboratory, which can reduce the pressure drop of the filter by 20 percent compared to the conventional filter. - 40 times, significantly reduce the flow resistance, greatly improve the breathability, and solve the technical limitations of the traditional mask breathing difficulties. At the same time, the Green Shield PM2.5 mask fabric is the only Canton fabric in the world that can simultaneously resist the three super bacteria H1N1, H5N1, and MRSA, and its antibacterial effect is remarkable.

Some experts pointed out that the damage to human health caused by air pollution is mainly manifested as "two fine details." One is a fine particle represented by PM2.5, and the other is a bacterial virus represented by H1N1, H5N1, MRSA, and the like. Fine particles, bacteria, etc., are inhaled through the respiratory route and cause respiratory and visceral diseases. Zhao Danqing, chairman of Kang Lun fiber, said that in order to prevent respiratory pollution and protect the respiratory health of daily use masks, must have anti-bacterial anti-mite function to play a sound protective effect, green shield mask used Kang Lun antibacterial technology and green Shield microfiltration technology is precisely the "two fine" nemesis, all-round solution to personal protection issues of air pollution. In response to the limitation of the lack of standard protective masks for daily use, Kang Lun Fiber Company recently formulated two standards, “Antibacterial Daybreak Respirator” and “Antibacterial Daybreak Non-woven Respirator”, which were approved by the government's quality supervision department and filled. Our country has a blank in this field.