Acquisition of new equipment to perform the “Tensile Adhesion Test” for thicknesses greater than 250 µm according to UNE EN-ISO 4624:2024 Method A or B.

Standard UNE-EN ISO 4624:2024 describes three methods for determining adhesion using a tensile test on a single film or a multi-layer system of paints, varnishes or related products.

These methods include:

– Method A: using two dollies, suitable for testing rigid and deformable substrates;

– Method B: single-sided test, using a single dolly, suitable only for rigid substrates;

– Method C: using dollies, one of it as a painted substrate.

  These test methods have proved useful for comparing the adhesion behaviour of different coatings. It is more useful for establishing relative classifications of a series of coated specimens showing significant differences in adhesion.

The test can be applied to a wide variety of substrates. Different procedures are given depending on whether the substrate is deformable, for example, low-thickness metal, plastics and wood, or rigid, for example, concrete of sufficient thickness and metal plates.

To avoid deformation of the substrate during the tensile test, it is common to use a sandwich type construction. For special purposes, for example, the coating can be applied directly to the surface of the test bed.