During this work the reduction of emissions of free formaldehyde of the cured adhesive composition for the manufacture of environmentally friendly plywood is identified, through the introduction of pre-activated sorbent of fillers into its composition, as well as reducing internal stresses in the adhesive layer of the cured binder. The resulting effects are related with the use of adhesive formulations of different sorbents fillers subjected to preactivation in various electromagnetic fields (fields over high frequency and weak pulsed magnetic fields).