neckerchief size: width 23cm / length 22cm
The antibacterial neckerchief with silver has a sewn-in pocket into which a nanofiber virus filter is inserted. The set includes a neckerchief + 2 pieces of three-layer filter.
- it can be used repeatedly (we recommend about 3-5x)
- it can be boiled at 80° C for 15 minutes
- cannot be used if the inner nanofiber layer is damaged or broken
- 2pcs in a package
Filter construction consist of three-ply textile material, support and cover layers of non-woven PES viscosis and inner layer made of Polyamid 6 nanotextile with firmly fixed molecules of silver.
Functional nanotextile is made by endless fibre with the diameter 200 - 600 nm made by electro-spinning method with its basis weight of 3 g / m2. Cover layer has basis weight of 35 g / m2, overall basis weight of this membrane is 73 g / m2.
Size of SARS-CoV-2 virus particles are between 80-150 nm. The penetration of particles of this size through the filter material is around 8%, which confirms the filtration efficiency of 92%. The test was performed at a permeable speed of 10.7 cm / s.