About usMedical device manufacturing
Van der Waals forces (or van der Waals’ interaction), named after Dutch scientist Johannes Diderik van der Waals: is the sum of the attractive or repulsive forces between molecules (or between parts of the same molecule) other than those due to covalent bonds, or the electrostatic interaction of ions with one another.
“Mechanisms for adhesion include both mechanical adhesion and specific adhesion. Mechanical adhesion occurs when the adhesive flows into the texture of the substrate. Specific adhesion includes electrostatic forces, van der Waals forces and acid-base interactions that take place between the adhesive and the substrate. In the case of acrylic pressure-sensitive adhesives, the intensity of the bond typically increases over time. This growing degree of ‘adhesive strength’ occurs because of the long time it takes for the adhesive to flow onto and into the surface texture, and for the adhesive polymer to align with the surface to create the interactions.”