New face masks can repel both PM2.5 and Covid-19
Chulalongkorn University’s Faculty of Engineering, in collaboration with PTT, has come up with a new three-layer face mask that provides protection from both fine dust particles and Covid-19.
Initial testing shows that the mask can filter up to 84 per cent of PM2.5 dust particles and trap up to 99 per cent of bacteria or viruses, said engineering lecturer Dr Pitchaya Rachadawong.
The mask’s outer layer is waterproof polyester infused with antiseptic compounds, the second layer is a filter made from fine fibres to trap dust particles, while the innermost layer is made of 100-per-cent cotton for the user’s comfort and safety.
The mask can be cleaned either by spraying it with alcohol or washed with soap and water. It can be washed up to 15 times.
The three-layer mask is suitable for airconditioned areas, as the wearer may find it too uncomfortable to wear outdoors.
The research team is working on thinner masks that offer the same or better protection.