Overmolding adhesion to PP, PC, ABS, PA and other substrates first depends on the material combination. The listed substrates do not mean that every TPE grade will bond to them.
Identify the substrate grade and additives, TPE formulation, part design and adhesion requirements. Use the materials’ technical information to control melt temperature, injection speed, substrate condition and surface cleanliness.
Drying or preheating must be confirmed for the specific materials rather than applied uniformly to every PA or other substrate.