Protection materials and technologies

Nonwoven electret materials

Electret filter material is a microfibre filter consisting of numerous thin fibers with electrostatic characteristics applied. When polluted air gets through such filter, Coulomb and/or polarization forces are generated, contributing to particles control — especially to small particles control, up to 1 micron.

Characteristic feature of electret filters is — charge resistance to humidity and temperature variations: the charge stays irrespective of increase or decrease of humidity and ambient temperature, that's why the filtering half-mask remains effective during the whole period of storage and operation.