FILTRATION MATERIAL, METHOD OF ITS PRODUCTION AND APPLICATION Russian patent published in 2013 - IPC B01D39/00 B82B3/00 A62B7/00 

FIELD: process engineering.

SUBSTANCE: invention relates to production of fibrous filtration materials, particularly, those of polyamide nanofibres. Nanofibres are made by electrostatic forming and feature diameter of 70 nm to 300 nm at standard deviation of fibre mean diameter not exceeding 30% and unit area weight of 0.02 g/m² to 1.2 g/m². Material is arranged on nonwoven substrate from polymer microfibres. Nanofibre is produced in compliance with Nanospider technology by electrostatic forming in high-voltage field generated between charged forming electrode and precipitation electrode. Fibres are formed from polyamide solution with polyamide concentration of 6 wt % to 12 wt % in the mix of formic and acetic acids taken at the ratio of 1:2, respectively. Produced material is used as working layer of individual respirators.

EFFECT: efficient retention of aerosol particles.

5 cl, 2 dwg, 1 tbl, 2 ex