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Avient is a recognized leader in the overmoldingof thermoplastic elastomers (TPEs), offering excellent adhesion to substrates like polypropylene, polyethylene, PC, ABS, acetal, and nylon. Our innovative TPE technologies ensure optimal adhesion in both insert and two-shot molding processes. Collaborating with Avient provides access to a world-class team with expertise in component design, tooling, molding processes, and formulation development.

The GLS™ TPE Overmolding Guide is a compilation of more than 25 years of experience in the development, design and processing of overmolding TPEs, based on contributions from a variety of Avient and industry sources.

With more information than the online sections below, this guide covers

Overmolding TPE Selection

  • GLS Product Line
  • Material Flow Behavior

Part Design

  • General Concepts
  • Flow Length and Wall Thickness
  • Shrinkage and Warpage
  • Shut-Off Design
  • Mechanical Interlock Designs

Mold Design

  • Mold Construction
  • Tool Layout
  • Runner Configuration and Design
  • Hot Runner Systems
  • Gate Design
  • Comparison of Gate Types

Processing

  • Machine Selection
  • Drying
  • Coloring
  • Purging
  • Regrind Injection Pressure and Speed
  • Injection Pressure and Speed
  • Melt Temperature
  • Substrate Temperature
  • Mold Temperature
  • Cooling Time
  • Factors Affecting Adhesion

Troubleshooting Guide

  • Problems and Corrective Actions

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