Seal
Seal area
Keep seal bars, wires, blades and contact areas clean and correctly set for the film.
View related machineryMaintenance guide
Shrink wrapping machine maintenance
Regular checks on seal quality, tunnel settings, conveyors and film handling help keep shrink wrapping machinery producing consistent packs.
UK specification advice
Maintain the process, not just the machine
Shrink wrapping problems often come from a combination of film, settings, product handling and machine condition.
Weak seals can be caused by contamination, incorrect dwell, film mismatch or worn components. Poor shrink can be caused by tunnel temperature, airflow, conveyor speed or product size changes.
A simple routine of cleaning, inspection and setup checks can reduce downtime and improve pack appearance.
Machinery route
Key maintenance areas
Focus on the parts that affect seal quality, film tracking and shrink finish.
Tunnel
Heat tunnel
Check tunnel airflow, temperature control and conveyor condition for consistent shrink.
View related machineryFilm
Film handling
Check film roll alignment, perforation, tension and suitability for the product.
View related machineryBuying notes
Operational notes
Operators should record settings that produce good packs for each product. This makes future changeovers quicker and reduces trial-and-error.
When a pack changes size or film thickness, treat it as a new setup rather than assuming the previous tunnel settings will work.
If recurring problems appear, check product transfer and film route before assuming the machine itself is at fault.
Common questions
Shrink machine maintenance FAQs
Why are my shrink wrap seals weak?
Possible causes include contaminated seal areas, incorrect temperature or dwell, worn parts or unsuitable film.
Why is the film loose after the tunnel?
Tunnel temperature, airflow, conveyor speed, film type or product size may need adjustment.
How often should settings be checked?
Settings should be checked at changeover and whenever product size, film or output speed changes.
Can maintenance improve presentation?
Yes. Clean sealing, stable transfer and consistent tunnel settings are central to good presentation.
Next step
Ask Lancing to recommend a shrink wrapping route
Send product dimensions, pack format, approximate output rate and film preference. Lancing can help compare chamber sealers, L-sealers, sleeve sealers, heat tunnels and complete shrink wrapping lines.