DAEJEON – In South Korea, the government is now rationing disposable nonwoven N94 or N95 face masks to two per person per week, due to the supply shortages associated with the Covid-19 outbreak.
A research team at the Korea Advanced Institute of Science and Technology (KAIST), however, has now developed a nano-filter that maintains excellent filtering efficiency even after hand washing, through the development of proprietary technology that aligns nanofibres with a diameter of 100-500nm in orthogonal or unidirectional directions.