Hafttechnik – Grundlagen und Anwendungen

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Abstract
Adhesion science – Fundamentals and applications. Films of paints and adhesives, both polymeric organic substances, must be connected to the pertinent materials strongly enough, so that the bond can withstand ordinary climatic and mechanical stress. At the stage of applying the liquid paint or adhesive, good wetting will be the basis for high adhesive strength after film formation. Moreover, it is necessary to attain a balance in the effectiveness of the forces at the interface, related to the polar und unpolar groups of either adhering material. Adhesion strength can also be improved by selecting an appropriate surface profile, of which roughness as such is not so important as shape. The profile should secure sufficient clamping of the film even under conditions occuring in practice, for example at high shear stress as generated in the case of shock loading. For defined combinations of material, these rules and guidelines are generally sufficient to obtain optimum adhension strength at the interface.