micronAir proTect
By MT Bureau| Nov 26, 2020

Freudenberg Adds Anti-viral Value To Cabin Air Filters

Closed environments like vehicle interiors pose a higher risk of infection through inhalation, filtrating airborne aerosols from the air. To keep passengers safe, Freudenberg is introducing micronAir proTect line filters that serves as an effective shield against airborne aero- sols transmitting pathogens such as H1N1 and HCoV-229E. The sophisticated dual mode of action of the new filter offers a viable option next to other available cabin filter solutions, including the high-efficiency particulate air (HEPA) filters. The company not only supplies to the vehicle manufacturers but also caters to the requirements of aftermarket.

In recirculation mode, removing viruses from the air largely depends on the efficiency of the filtration system and the air exchange rate. Automotive interior filters of the “micronAir proTect line”, which Freudenberg manufactures for car manufacturers, can filter roughly more than 90 percent of the viral aerosols. The first two layers capture most of the ultrafine aerosols. The optional third layer captures harmful gases. An innovative fourth layer coated with fruit extract then inactivates almost 100 percent of the detected viral load, preventing the release of active viruses back into the cabin air following vibration. This has been demonstrated in a series of comprehensive tests carried out in cooperation with an independent external research institute.

Vehicle cabin air filters by Freudenberg Filtration Technologies contribute to effective SARS-CoV-2 sur- face protection. Recent ISO18184 tests conducted by the re nowned Guang Zhou Institute of Microbiology (China) have shown the company’s micronAir proTect line filters to inactivate virtually 100 percent of viruses by an unique anti-viral filter layer. Recent ISO test finds micronAir®  proTect line filter successfully wards off various virus types. 

“To reach this vital goal, our micronAir cabin air filters follow a two- pronged approach,” Ashok Pandey, Head, Automotive Filters at Freudenberg Filtration Technologies, India, said. “Our cabin air  filter solution captures aerosol droplets and droplet nuclei within the range of 0.05 μm to 16 μm. As the latest COVID-19 studies of the World Health Organisation (WHO) showed, these aerosols contain the critical virus load, causing harm as they are emitted during breathing, talking, coughing or sneezing. Once captured on the filter, the viruses are inactivated through a patented approach based on natural fruit extracts to prevent secondary contamination.” Upon reaching the filtration medium, viruses interact with the fruit extract’s acid environment. The reaction causes the rendering or denaturation of the virus’ protein structure, which leads to a harmless pathogen unable to infect human cells. (MT)


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