Polypropylene nonwovens were modified by addn. of hezamethylene-1,6-bis(N,N-dimethyl-N-dodecylammo-nium bromide) deposited on aluminosilicate nanocrystals (grain size below 100 nm) during their prodn. by melt -blown technol. After 24 h of incubation, a signifivant decrease in the no. of E. coli bacteria on the nonwovens was obsd.