Plastic face shields are not effective in blocking aerosols
A Japanese study found that: plastic face shields are not effective in blocking aerosols. Makoto Pakura, head of the research team of the Computational Science Center of the Institute of Physics and Chemistry, Japan, told the Guardian reporter: “From the simulation results, it is regrettable that, compared with masks, face shields are effective in preventing aerosols from The oral spread of infected patients is limited.”
Reference News Network reported on September 23 that the British “Guardian” website published a report titled “Japanese supercomputers say that face shields are not effective in locking aerosols” on September 22. The author is reporter Justin McCurry. The report pointed out: The supercomputer calculated that plastic masks are almost ineffective at locking up respiratory aerosols. The report is excerpted as follows:
According to a Japanese model, plastic face shields are almost completely ineffective in blocking respiratory aerosols. This makes people doubt the effectiveness of face shields in preventing the spread of the new coronavirus.
A simulation conducted using the world’s fastest supercomputer “Fuyue” found that almost 100% of aerosols with a diameter of less than 5 microns (one micron equals one millionth of a meter) are commonly used by service industry workers The kind of plastic mask escapes.
In addition, the RIKEN, a government-supported research institute in the western city of Kobe, said that half of the larger aerosols of 50 microns in diameter escaped into the air.
As some countries try to restart the economy, face shields have become commonplace in industries that require public contact, such as shops and beauty salons.
Makoto Hachikura, head of the research team at the Center for Computational Science at the Institute of Physics and Chemistry, said that the simulation combined airflow with tens of thousands of aerosol copies of different sizes, from less than 1 micron to hundreds of microns.
He reminded people not to wear a mask instead of wearing a mask.
Makoto Pakura told a reporter from The Guardian: “From the simulation results, it is regrettable that, compared with masks, face shields are less effective in preventing aerosols from spreading from the oral cavity of infected patients.”