Technical Articles
Why Corrugated Board Delamination Happens
Understand the main causes of corrugated board delamination and how buyers and factories can prevent it.
Quick Answer
Corrugated board delamination usually happens because of poor adhesive bonding, incorrect glue viscosity, low application temperature, excessive moisture, wrong paper grade, or unstable machine settings. Fixing delamination requires checking both adhesive quality and production conditions.
Main Causes
Glue viscosity too low or too high.
Insufficient glue application.
Paper moisture content out of range.
Machine temperature or pressure not suitable.
Poor starch gelatinization or incorrect mixing ratio.
Prevention Steps
Monitor viscosity regularly during production.
Match adhesive type to paper grade and line speed.
Control paper moisture before bonding.
Train operators on consistent application settings.
Work with suppliers that provide troubleshooting support.
Buyer Impact
Delamination increases waste, reduces box strength, and creates customer quality claims. Adhesive cost savings mean little if board failure rates rise.
PackTrades Recommendation
If delamination appears after switching suppliers, test adhesive and paper together before blaming only the glue or only the machine.