As temperatures have started to rise recently, various issues can arise with adhesive labels due to the heat.
What will happen when the summer comes? Here are some effects of high temperatures on adhesive labels and important considerations:
Issue 4: Label Face and Backing Paper Sticking Together
During LabelingIf labels and backing paper stick together during the labeling process, but there were no issues during
the previous processing stages (like release force or die-cutting depth), it could be due to increased adhesive flow caused by higher temperatures.
This can lead to adhesive leaking into the die-cut edges and causing sticking problems.
Precautions:Winding Tension: After die-cutting, avoid excessive winding tension.
Reduce the winding tension as much as possible without causing deformation of the material.
Storage and Transportation: Avoid high temperatures during storage and transport, and especially prevent prolonged exposure to direct sunlight.

Issue 5: Poor Adhesive Performance
In high temperatures, adhesive materials can experience accelerated aging, causing the adhesive properties to decline over time.
This can lead to application issues within the product’s shelf life, especially with hot-melt adhesives, which are significantly affected by heat.
When temperatures exceed 45°C, the adhesive’s stickiness decreases, its flowability increases, and its cohesion weakens.
Precautions:Processing, Storage, and Transport: Avoid high temperatures during the processing, storage, and transport of materials.
Performance Testing: For materials stored under poor conditions or for extended periods, perform a performance test before use.
If the final application involves high temperatures, consider using water-based or oil-based adhesives instead.

Issue 6: Bubbles and Wrinkles in Labels
Labels may appear fine during application, but if there is a temperature difference between storage and application,
or if the labeled item expands or contracts with temperature changes, it can cause the labels to bubble or wrinkle.
Additionally, in high-temperature environments, liquids from non-barrier bottles can seep out and react with the adhesive,
leading to bubbling and lifting.
Precautions:
Conditioning: Before application, allow the labels and the items to be labeled to equilibrate in the same environment for 24 hours.
Post-Application: After labeling, let the items sit in the final application environment for 24 hours before
exposing them to significant temperature changes.
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