2026-02-14•6 min overmolding guide•VIESUNCO Materials Science Team

Overmolding Delamination Fix: Practical Guide for Bonding TPE onto PP, ABS & Nylon PA66

Tired of soft grip peeling off rigid power tools? Master substrate preheating, gate location, and maleic anhydride grafted TPE selection for maximum bond strength.

#Overmolding#Nylon Bonding#Peel Strength#Adhesion Fix#Tool Grips

Overmolding Delamination Fix: Practical Guide for Bonding TPE onto PP, ABS & Nylon PA66

1. Top 3 Causes of Overmolding Peeling

Simply raising injection temperature does not fix bonding issues:

▲ Macro Photo of Overmolded Soft TPE on Rigid Nylon Tool Part

Never use mold release spray on the primary rigid substrate.
Dry Nylon substrates thoroughly at 100°C before second-shot molding.
Select polarity-matched TPE grades (MAH-grafted for PA6/PA66).

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