Adhesive Flow: When Time, Heat, or Pressure Distort the System

You coated the liner, wound it tight, and shipped it perfectly aligned. But when the roll arrives, labels are misregistered. Silicone transfer appears. The edges feel sticky.

What happened?

You’re dealing with adhesive cold-flow—a phenomenon where the PSA (pressure-sensitive adhesive) slowly migrates under pressure, temperature, or time.

It can happen:
– During long storage under high tension
– In hot transport containers
– With soft adhesives and low liners with low CoF
– In rolls stored horizontally or double-stacked
– The adhesive doesn’t melt—but it creeps. Especially in multilayer constructions or when liner modulus is low.

Symptoms:
– Labels slide or shift on the liner
– Silicone gets contaminated or displaced
– Liner unwind is erratic due to tacky edges
– Edge bleed or fuzz develops over time

How to prevent it:
– Specify adhesive flow resistance during material selection
– Store rolls vertically, avoid tight winding post-lamination
– Use stiffer liners or higher-density silicone crosslinking
– Avoid hot and humid storage conditions, especially in summer transit

Adhesive memory is real—and it remembers every minute of pressure.

Is your liner system designed for transport, not just application?