Soft-touch overmolding has become the go-to solution for creating ergonomic tool handles, power tool grips, and consumer product handles that offer superior comfort and non-slip performance. The most effective method is two-shot injection molding (also called multi-shot or double-shot overmolding), where a rigid substrate is molded first, followed immediately by a soft elastomer layer in the same machine.
Best Process and Materials
The optimal approach uses TPE overmolding or TPU overmolding on rigid plastics such as ABS, PP, PC, or glass-filled nylon. TPE provides an excellent soft-touch feel (typically 40-70 Shore A), outstanding grip, and good chemical bonding. For two-shot molding, material compatibility is critical—select grades specifically designed for overmolding to ensure strong adhesion without delamination.
Insert overmolding serves as an alternative for lower volumes, but two-shot injection molding delivers higher efficiency, better bonding, and lower labor costs for medium-to-high production runs.
Key Advantages for Handles
Enhanced ergonomics and reduced hand fatigue
Excellent vibration dampening and shock absorption
Improved aesthetics with matte or textured soft-touch surfaces
Better durability and premium feel
Design tips include mechanical interlocks (grooves or undercuts), optimized wall thickness (1-2.5mm for soft layer), and proper gate placement for uniform flow.
For manufacturers seeking soft-touch overmolding for tool handles, TPE overmolding ergonomic grips, or high-quality two-shot soft touch handles, partnering with an experienced injection molding supplier ensures consistent quality and cost efficiency.