Technical Guides
Best Practices for Laminating Adhesive Application
Optimizing laminating adhesive application for strong, consistent bonds at the double backer.
Laminating adhesive bonds the single-face web to the bottom liner at the double backer. Proper application is critical for board quality and production efficiency.
Understanding the Laminating Process
At the double backer, laminating adhesive is applied to the flute tips of the single-face web. The bottom liner is then pressed against the adhesive-coated flutes while passing over hot plates.
Key Application Parameters
Adhesive Weight
Typical range: 3-6 g/m² dry weight
Lower weights for porous papers
Higher weights for dense or coated papers
Monitor consumption per MSF
Film Uniformity
Even coverage across full web width
Consistent glue line width on flute tips
No dry spots or heavy spots
Viscosity Control
Typical range: 30-45 Stein-Hall seconds
Check every 2 hours minimum
Adjust for temperature changes
Equipment Setup
Glue Roll Gap
Set precisely for flute type
Check with feeler gauge regularly
Adjust for paper thickness changes
Doctor Roll
Maintains uniform glue film
Must be parallel to glue roll
Inspect for wear and scoring
Glue Pan Level
Maintain consistent level
Too high causes dripping
Too low causes starvation
Hot Plate Settings
Temperature: 150-180°C typical
Boiler-free lines: Lower temperatures with instant adhesive
Even temperature across width
Troubleshooting Tips
Weak Bond
Increase adhesive weight
Check gel temperature
Verify hot plate temperature
Board Warp
Balance moisture between liner and single-face
Check adhesive viscosity
Verify even glue application
High Adhesive Consumption
Reduce glue roll gap
Check doctor roll condition
Verify viscosity is in range
For product matching and trial planning, review /products/laminator-glue and /products/alkali-free-adhesive. Xuegong New Materials Group can help align adhesive selection with your line speed, paper mix, and quality targets—contact us for samples or a factory quote.
More in Technical Guides
Corrugator Chrome Roll Cleaning Procedures
Clean corrugator chrome rolls on a locked schedule—remove starch film without scratching the surface or shifting glue-gap alignment after remount.
Adhesive Supplier Evaluation Checklist
Score adhesive suppliers on 15 plant criteria: TDS, trials, lot consistency, logistics, and true cost per bonded square metre.
Corrugator Roll Alignment and Parallelism
Measure corrugator roll alignment and parallelism to catch tilt, heat growth, and weak-edge bonds before they become scrap.