In case of surface pretreatment of Kapton films - what should be thickness of Kapton layer affected by employed for pretreatment technique - to achieve strongest adhesion ?
Dear Leonid, good tool for adhesion improvement for Kapton film is vacuum plasma. In this case Kapton layer affected is small (hundred Angstroem, not more), but effect is strong. I can help you (even for industrial trials).
For my opinion plasma treatment cannot be regarded as tool for generally promoting strongest adhesion between two different components though it is well established that plasma treatment can contribute to improved component adhesion. From my point of view such a treatment can improve compatibility between two components in dependance on the chosen gas. Also some reactive groups can be implemented which are able to react with the second component (depending on its chemistry). However, to achieve strongest adhesion, also other factors should be taken into consideration which can not be easily achieved by application of plasmas. A large surface area facilitating mechanical interlocking as well as increased chemical interchanges are also essential for generating strongest adhesion apart from interpenetration of component within the interface. For this thicker layers are required which can be penetrated. For this I would prefer a chemical treatment leading to component compatability, reactivity and/or increased interchanges (e.g. cooperative effect by application of polymers) as well as improved surface roughness. The latter can be possibly achieved by e.g. additional application of (polymeric) nanoparticles.