Shrink Sleeve labeling with Tunnel

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Shrink sleeve labeling with a tunnel refers to the process of applying shrink sleeve labels onto containers and then subjecting them to heat in a shrink tunnel to shrink and conform the label tightly to the container’s shape. This method is commonly used in various industries such as beverages, food, cosmetics, and household products.

The process typically involves the following steps:

1. Sleeve Application: The shrink sleeve labels are applied to the containers using a labeling machine or applicator. The labels are positioned and secured on the containers, typically using adhesive or by utilizing the natural tension of the shrinkable material.

2. Conveyor Transition: The labeled containers are then transferred onto a conveyor system that transports them through the shrink tunnel. The conveyor ensures a consistent flow of containers and prevents them from toppling over during the shrink process.

3. Shrink Tunnel: The containers with the applied shrink sleeve labels enter the shrink tunnel, which is a specialized chamber that uses heat to shrink the labels. The tunnel may utilize hot air, steam, or infrared radiation to provide the required heat.

4. Heat Shrinkage: As the containers pass through the shrink tunnel, the heat causes the shrinkable material of the labels to contract and conform tightly to the container’s shape. The labels adhere securely to the container’s surface.

5. Cooling and Solidification: After the heat shrinkage process, the containers move through a cooling section to solidify and set the labels in their shrunken state. This helps to maintain the label’s position and integrity.

6. Inspection and Verification: Some systems may include inspection mechanisms within or after the shrink tunnel to check for proper label shrinkage, quality, and any defects. This can involve sensors or vision systems to detect errors or inconsistencies in the labeling process.

7. Output and Collection: Once the labeled containers have gone through the shrink tunnel and cooling section, they continue along the conveyor and are collected or further processed for packaging or distribution.

Shrink sleeve labeling with a tunnel offers several benefits, including 360-degree coverage, vibrant graphics, and the ability to label containers of various shapes and sizes. It provides a visually appealing and tamper-evident packaging solution.

When considering shrink sleeve labeling with a tunnel, it’s essential to evaluate your specific production requirements, such as container sizes, labeling speed, label dimensions, and the desired shrink material (PVC, PET, OPS, etc.). Additionally, consider the required heat settings and cooling mechanisms within the shrink tunnel to ensure optimal label shrinkage and overall packaging quality.