Can TPE and TPR Be Overmolded Onto Rigid Plastics for Enhanced Functionality?

The ability to **overmold** is one of the most powerful and versatile features of **Thermoplastic Elastomer (TPE)** and **Thermoplastic Rubber (TPR)**, allowing designers to create multi-material products with enhanced ergonomic, aesthetic, and functional properties. Overmolding is the process of molding a layer of soft TPE/TPR directly onto a rigid plastic substrate, such as Polypropylene (PP), Polystyrene (PS), or ABS. This process creates a chemical and/or mechanical bond between the two materials.

Our TPE and TPR compounds are specifically formulated with grades that ensure superior adhesion to common engineering plastics. This allows for the creation of soft-touch grips on rigid tool bodies, seals and gaskets integrated directly onto hard plastic housings, and vibration-dampening zones within complex assemblies. Overmolding eliminates the need for adhesives or mechanical fasteners, simplifying assembly, reducing labor costs, and improving the overall part integrity. A key consideration is the chemistry of the TPE/TPR relative to the substrate; we provide specialized grades that bond effectively to different plastic families. By leveraging this overmolding capability, manufacturers can significantly enhance product ergonomics and sealing performance without compromising the structural rigidity of the base material.