The required adhesion is dependent on the end-use application and environment. Not all overmold grades bond to all substrates. The substrate type determines which RTP Company TPE overmolding grade must be used to achieve the best bond. The end-use environment also influences which grade to select. The expected service life of the product should be considered when establishing adhesion requirements. Initial material selection is the first step.
Shear and peel forces that the product encounters should be considered. Mechanical interlocks and use of undercuts and ribs will create a higher surface area and improve product performance.