Shrink film doesn't perform in isolation — the humidity and temperature of your facility affect how it seals and shrinks, sometimes in ways that get mistaken for a machine or film defect. Here's what's actually happening.
How Humidity Affects Sealing
High humidity can affect how film seals, sometimes producing weaker or inconsistent seals even when temperature settings haven't changed. If seal quality seems to drift with the seasons, humidity is worth investigating before assuming equipment failure.
How Ambient Temperature Affects Shrink Results
A facility that runs hotter in summer or colder in winter changes the baseline temperature film enters the tunnel at, which can shift your ideal tunnel settings throughout the year. Settings dialed in during winter may need adjustment once summer temperatures climb.
Signs Environmental Conditions Are the Culprit
- Seal or shrink quality changes without any settings being adjusted
- Issues correlate with seasonal changes rather than a specific date or event
- Multiple machines show the same drift around the same time
What to Do About It
Rather than treating settings as fixed, plan for small seasonal adjustments to tunnel temperature and conveyor speed, and consider facility climate control if consistency is critical to your product.
Still Seeing Inconsistent Results?
If you've ruled out environmental factors and still have issues, our service team can help diagnose the cause. Contact us for support.
