Protective coating

foam

Foams are artificially produced materials with cellular structure and low density. Classifications Closed-cell foam: the walls between the individual cells are completely closed Open-cell foam: the cell walls are not closed; these foams can therefore absorb liquids Mixed-cell foams contain both types of cells Integral foams: they have a closed, thick outer skin and a cellular core; the density decreases towards the core Properties Foams are characterized by a very low density (weight per volume) and thermal conductivity with only low strength. Due to the interior structure, components made of foam are virtually free of residual stress.