Most adhesive tapes have an initial tack of 60% and only reach their full tack after 72 hours. By increasing the pressure and/or heat, the final adhesive strength can also be reached more quickly.

But beware: deformation and expansion of the component generate restoring forces!

The strength of the adhesive bond depends on the contact that the tape has with the surface. A short, high pressure, e.g. with a pressure roller, ensures a good initial surface contact. One can assume an optimal pressure of approx. 10 - 50 N/cm² - depending on the material and geometry of the moulded part.

The adhesive tape should be brought to the same temperature as the substrate at least 24 hours beforehand. 21 °C is optimal for bonding.

The higher the surface energy, the better a surface can be adhered to. Therefore, this should definitely be taken into account. A low surface energy can be improved with the help of a pre-treatment to enable optimal bonding.

If you want to know more about surface energy and its determination, we can recommend our blog article on this subject.