Military Grade Carbon Filter
Our inner filter is made from a 100% pure activated carbon cloth, which was originally invented by the UK Ministry of Defence. It was then extensively developed and made into a product for use in chemical, biological and nuclear warfare protection, used by armed forces around the world.
All activated carbons – traditionally powders and granules – generate “Van der Waal” forces due to their porous structure. These forces give activated carbons their unique potential to absorb molecules, including anions and cations into their internal pores.
Our filter material is comprised of a series of activated carbon filaments, each about 2,000 nanometres in diameter. The pores in each filament are 25 times smaller than those in standard carbon materials, and therefore more powerful. This means that bacteria and viruses are drawn to the surface from further away.
The high number of filaments – spun into a yarn and then woven into cloth – concentrate and intensify the Van der Waal forces, including powerful electrostatic charges. This way, not only are molecules such as endotoxins quickly absorbed into the pores from a much wider area, but these forces also attract and immobilise much larger particles including bacteria, which often have a negatively charged membrane. The material traps the bacteria and draws out the gel-like cytoplasm inside – killing it and preventing infection.
Cambridge Masks are therefore powerful respirators that not only clear the air of pollution via the particulate filter, but also remove potentially harmful pathogens with the additional carbon filter.