Understanding Nano Filter Face Mask
What exactly IS nanotechnology and how does it make a difference in protecting us from pollution? Watch the following video to get all the facts!
Metamasks filters feature an exclusive New Zealand nanofibre tested by NELSON LABS in June 2020.
Downloads testing Viral Filtration Efficiency - Bacterial Filtration Efficiency - Latex Particle Challenge_2
As shown in the lab results below, our exclusive 'hyperloft' nanofibre captures airborne particulates down to a size of the smallest viruses (0.1 microns), while meeting or exceeding international standards at 2.5 microns (99%).
With electrospun nanofibre filters, it is common for the filtration efficiency to be higher as the particle size decreases. This mode of action is due to diffusion and electrostatic attraction. Nanofibres are therefore often able to filter small particles better than larger ones due to enhanced electrostatic attraction.
Some particles in the nano range (around 0.2 - 0.3 μm) have been proven to be difficult to filter as they do not behave according to normal capture mechanisms (i.e mechanical efficiency, or the “sieve effect”). These particles are referred to as the most penetrating particles size (MPPS). Particles that are MPPS or smaller are captured via diffusion (or electrostatics) while larger than MPPS are usually captured via mechanical filtration. Electrospun nanofibre is an excellent filter media due to the combination of both particle capture mechanisms.
We think this was observed more readily on the Nelson Labs test because there was a calibrated amount of each particle size, and very accurate equipment.