Physical mechanisms of the interaction of cold plasmas with organic surfaces are discussed. Trapping of
plasma ions by the CH2 groups of polymer surfaces resulting in their electrical charging is treated. Polyethylene
surfaces were exposed to the cold radiofrequency air plasma for different intervals of time. The
change in the wettability of these surfaces was registered. The experimentally established characteristic
time scales of the interaction of cold plasma with polymer surfaces are inversely proportional to the concentration
of ions. The phenomenological kinetic model of the electrical charging of polymer surfaces by
plasmas is introduced and analyzed.