The adhesion of the overmolding plastic with the substrate is of course usually a relevant specifications in many applications. The issue is that the adhesion of a molten plastic with metal is intrinsically close to 0, broadly speaking. Depending on the nature of the polymer and those of the metal substrate, a specific treatment might be applied to trigger the adhesion.
Some internal studies have shown that a good adhesion between our Tecnoflon FKM and metal can be obtained during molding and curing provided a specific metal surface treatment and the use of a primer. This is well documented in this presentation.
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For some E&E applications, a specific chemical etching process is applied on the metal with the objective to get a "nano-mechanical locking". This Nano Molding Technology (NMT-one slide, NMT-thesis) developed and patented by Taisei Plas was successfully used these last years by some of our customer(s).
