In The Future, It Is Difficult To Prevent Fog And Haze Masks From Getting "Fish In Troubled Waters".

In the name of PM2.5, the protection effect is not ideal. In the future, fog and haze will be prevented.

It's hard to fish in troubled waters again.

According to the reporter's interview, the national standard of "daily protective mask technical specification", which was led by Jiangsu, will be formally implemented in November 1st this year. It is reported that this is also the first national standard for civil respirators in China.

When fog and haze pollution is serious, many people will wear anti fog and haze masks. At present, PM2.5 protective masks on the market are not only quite different in price, ranging from several yuan to 100 yuan, but also have many differences in protection function. Many masks are used to prevent PM2.5, but the protective effect is not ideal.

Jiangsu provincial quality supervision department has been right.

Marked with a PM2.5 respirator.

The results showed that the filtration efficiency of 90% was less than 50% of the total, and most of the products did not have effective dustproof effect.

The confusion in the market of the civil respirator is due to the absence of standards.

The national standard of "daily protective mask technical specification", which was drawn up by the Jiangsu special protection product quality inspection center, will be formally implemented in November 1st this year. It is reported that this is also the first national standard for civil respirators in China.

Lu Bing, director of the center, said that there are two key indicators in the code: the protective effect on fine particulate matter (PM2.5) and the safety performance of wearing.

According to the air quality category, the standard has divided four levels of protective effect of respirators: D is suitable for moderate (PM2.5 concentration of less than 150 micrograms / cubic meter) and below pollution, C is suitable for heavy (PM2.5 concentration of less than 250 micrograms / cubic meter) and below pollution, B level is suitable for serious and below pollution (PM2.5 concentration is less than 350 micrograms / cubic meter), class A is suitable for serious pollution (PM2.5 concentration of 500 micrograms / cubic meter).

No matter which level of respirator is chosen, the filtered air must meet the excellent standard.

Many businesses will highlight the "filtration efficiency" of propaganda masks, but quality inspection experts say that filtration efficiency is an important indicator of respirators, but if the sealing performance of respirators is not good and the filtration efficiency is high, the final protection effect will be greatly reduced.

Therefore, in the code, filtration efficiency is no longer regarded as the main evaluation index of masks, and the protective effect that can better reflect the final effect is chosen.

The respirator can reduce the concentration of inhaled PM2.5 to 75 micrograms per cubic meter after wearing the respirator, so that the air quality after inhalation can reach the level of above and above.

In addition, the specification also put forward specific requirements for safety indicators such as formaldehyde, pH value and microorganism. Taking into account the safety of the wearer when walking, it also stipulates that the visual field below the mask should not be less than 60 degrees, so that the arch's design of the mask can be prevented from overaffecting the sight of the wearer.