Recognise the symptom before changing settings
Describe what changes, where it first appears and whether it follows a product batch, packaging batch, filling head, lane, speed, temperature or time in the run. Typical observations include:
- label edges lift shortly after application
- labels detach in chilled storage
- adhesion varies by container batch
- labels stick to some products but not others
Likely causes to separate
A symptom can have several unrelated causes. Treat the following as hypotheses to test rather than a list of settings to change at once.
- moisture, oil, release agent or dust on the surface
- container or label below the adhesive application temperature
- low-surface-energy plastic
- adhesive unsuitable for refrigeration, chemicals or curvature
- insufficient initial contact and dwell
Check in this order
Check 1
Inspect packs immediately before labelling.
Check 2
Measure surface and label temperature.
Check 3
Compare retained samples by container and label batch.
Check 4
Apply labels manually under controlled clean conditions.
Check 5
Consult material suppliers with the actual chemical and storage environment.
Corrective actions to evaluate
After the cause is demonstrated, select the least disruptive correction that returns the process to a safe, repeatable and approved state.
- dry and clean the pack before labelling
- select a compatible adhesive and facestock
- condition labels and containers to the approved temperature
- improve wipe pressure and contact duration without deforming the pack
- move labelling after a suitable cooling or drying stage
Prevent the problem returning
- control container contamination upstream
- store labels correctly
- include cold, wet and chemical exposure in validation
- monitor adhesion after realistic distribution time
Record evidence, not only the final setting
Capture the product and packaging batches, machine recipe, head or lane, speed, temperature, vessel level, symptom frequency, intervention and post-correction results. This creates a usable centreline and allows recurring loss to be prioritised through OEE or downtime analysis.
Common questions
What is the first check for labels lifting or not sticking to containers?
Inspect packs immediately before labelling.
What commonly causes labels lifting or not sticking to containers?
Common causes include moisture, oil, release agent or dust on the surface, container or label below the adhesive application temperature, low-surface-energy plastic.
Should the machine be adjusted immediately?
Change one controlled variable at a time after the measurement method, product condition, packaging and safety state are confirmed.
When should production be stopped?
Stop and follow the site safe-isolation and escalation procedure when there is risk of injury, contamination, fire or explosion, uncontrolled product release, damaged guards, unsafe pressure or an unverified quality result.
What information should be recorded?
Record product and pack batch, recipe, machine settings, filling head or lane, time, temperature, speed, symptom, corrective action and the evidence that performance returned to the approved condition.