3 ms·
> non-woven base material what does that mean?
by t8e56vd4ih 5y ago
> non-woven base material
what does that mean?
- m3nu 5y agoIt's a kind of artificial textile. For face masks it needs to be small enough to filter large droplets, but large enough for air. It also has an electric charge to bind very small particles to the fabric. So not your ordinary fabric.