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Sleeve shrink

Introduction

Shrink sleeve labeling is a widely used packaging method in industries such as beverages, cosmetics, and pharmaceuticals. In this process, a heat-sensitive sleeve is applied over a container and passed through a heat tunnel to conform tightly to its shape.

A client using this technology faced frequent issues due to temperature inconsistency, especially when handling varied bottle shapes. Improper thermal control led to visible defects and production inefficiencies.

Challenges

Due to fluctuating or poorly controlled heat within the shrink tunnel, the company encountered:

  • Film wrinkling, bubbling, and label displacement
  • Ink smudging, fading, or burning on printed sleeves
  • Misaligned sleeves causing downstream jamming
  • Excessive sleeve wastage and high product rejection
  • Frequent manual intervention to adjust temperature during shifts

Solution

  • Controller Used: 48×48 mm – Model TCS4T2AO
  • Installation: Integrated into multiple heat zones of the shrink tunnel
  • Set Point: Tuned to optimal temperatures per zone based on container geometry
  • Monitoring: Real-time zone-wise temperature feedback with display
  • PID + Auto-Tuning: Ensured thermal precision with adaptive control
  • Operator Interface: Intuitive keypad for easy recipe switching and diagnostics

Benefit to Customer

The installation of GIC’s TCS4T2AO provided the following improvements:

  • Thermal Stability: Uniform temperature throughout tunnel, no hot/cold zones
  • Improved Label Finish: Wrinkle-free, smooth sleeve application across bottle shapes
  • Downtime Reduction: Reduced need for operator corrections and stoppages
  • Lower Rejection & Waste: Fewer defective sleeves and reduced raw material loss
  • SKU Flexibility: Quick shift between product types via saved settings
  • Maintenance Simplicity: Diagnostics and modular design simplified service

Conclusion

The GIC Temperature Controller TCS4T2AO helped the customer transform their shrink sleeve labeling line into a stable, efficient, and quality-driven operation.
With precise thermal regulation across multiple tunnel zones, the production line now runs longer with fewer errors, less waste, and better packaging consistency.


This upgrade has enabled the manufacturer to meet both quality standards and production targets, while enhancing operator usability and line reliability.