In plastics processing, bridging refers to a condition where granulate fails to flow properly into the screw feed zone. This often occurs when coarse granules interlock mechanically or stick together due to excessive heat, forming a “bridge” that spans the hopper outlet. As a result, material cannot descend freely, creating a void underneath the bridge. This interruption in material flow can lead to process instability and poor product quality.
Bridging in PP material
Bridging in the hopper
Related Topics:
Bulk Material Handling
Material Flow
This glossary of plastic industry is provided by PLEXPERT Canada Inc.
