Modified Polypropylene Fibrous Nonwoven Materials

Polymer nonwoven materials based on polypropylene are the basis for the creation of protective medical masks. Modification of the filter layers has been performed by electron-beam deposition from the active gas phase formed by the electron-beam dispersion of PTFE. The filtration efficiency was investigated by two indicators: the PFE with a diameter of 2.5 $\mu$m (PM2.5), BFE in accordance with GOST R 58396-2019 for three-layer combinations of nonwovens, the inner layer of which had a modified coating. An increase in the filtration efficiency for both indicators was observed for all samples, which is associated with physicochemical changes of the surface of the active layer.