The Times of India (Índia) online

Plastic film used in food packaging kills coronavirus: Study

Publicado em 20 novembro 2020

All this while we have been relying on kitchen ingredients like turmeric, cinnamon, ginger and garlic to help protect us from the deadly COVID19 virus, but the real solution is something else. According to a recent research conducted by scientists on food packaging may come as great relief for those who cannot help ordering food from outside during the pandemic and those in the hospitality industry. As per a study, transparent stretchable plastic (PVC) film used in packaging food, meats and vegetables may deactivate the coronavirus! Marketed by Brazilian plastics manufacturer Alpes, the material contains silver and silica nanoparticles, a technology developed and licensed by Nanox.

In tests conducted at the University of Sao Paulo's Biomedical Sciences Institute (ICB-USP), the PVC film proved capable of eliminating 79.9 per cent of the particles of SARS-CoV-2 in three minutes and 99.99 per cent in up to 15 minutes. According to the study author Lucio Freitas Junior, elimination of the virus by the material was extremely effective and fast.

The film was tested against ISO 21702:2019, the technical standard governing the measurement of antiviral activity on plastic and other non-porous surfaces, and requiring demonstration of this capability within four hours. Samples of the material with and without silver-silica nanoparticles were kept in direct contact with SARS-CoV-2 for varying amounts of time. After the stipulated periods, the viral particles found in the material were removed and placed in contact with Vero cells to measure the infection and replication rate after exposure to the film. Vero cells are derived from the kidney of an African monkey and widely used in microbiological cultures. The viral genetic material was quantified by PCR, showing a reduction of almost 100 per cent in copies of SARS-CoV-2 after 15 minutes of exposure to the film.