Welcome: Shanghai Suren Machinery Manufacturing Co., Ltd.
Language: Chinese ∷  English

Industry new

Heat Shrink Tunnel Machine for Packaging Lines

The heat shrink tunnel machine remains a critical downstream unit in modern sleeve and shrink-label packaging lines. After sleeves are applied to bottles, cans, or multi-packs, the tunnel provides controlled heat to shrink the film tightly around the container. Its performance directly affects label appearance, wrinkle control, seam quality, and line stability. Even a well-calibrated applicator can produce unsatisfactory results if the shrink tunnel cannot deliver uniform temperature and airflow at the required line speed.

Energy consumption has become a more prominent selection criterion in recent years. Heating systems represent one of the more energy-intensive stages in shrink packaging, especially on lines running continuously or handling multiple formats. Newer tunnel designs focus on improved insulation, optimized airflow paths, and more precise temperature zoning to reduce unnecessary heat loss. Some systems also allow flexible energy sources, such as electric, gas, or hybrid configurations, helping plants adapt to local utility costs and supply conditions.

Film compatibility is another area where tunnel configuration matters. PVC, PETG, OPS, and polyolefin films do not shrink at the same rate or respond identically to hot air distribution. A tunnel that works well with one material may cause uneven shrinkage, hazing, or distortion with another if temperature profiles and conveyor speed are not properly adjusted. As recyclable and thinner films gain attention, equipment must provide finer control to avoid overheating while still achieving full shrinkage.

For buyers evaluating a heat shrink tunnel machine, integration with the upstream applicator should not be overlooked. Conveyor synchronization, bottle guidance, entry height, and dwell time all influence final quality. Tunnels that allow quick adjustment of temperature zones, airflow direction, and belt speed are better suited for facilities running frequent changeovers. Modular designs also simplify maintenance, cleaning, and future capacity upgrades.
PREVIOUS：Selecting a Supplier of Automatic Shrink SleeNo next

RELATED NEWS

LATEST NEWS

CONTACT US

Contact: Wendy Jiang

Phone: +86-13482266656

Whatsapp: +86-13482266656

Email: wendy.jiang@sr-packing.com

Add: No. 18, Changting Road, Fengxian District, Shanghai, China