Shrink Sleeve Applicator & Shrink Tunnel: How the Complete System Works
A shrink sleeve labelling machine is an automatic way of applying a label to bottles/jars/containers with hard surfaces. This type of auto applicator is mostly used when your required number of labeled bottles exceeds 25k per day. This is a great way to save energy, electricity, labor & time. This can be used for almost every sector, say, such as food & beverage, pharmaceutical, cosmetics, Agrochemical, personal care, and many more. It can be connected to your filling lines by matching the speed of the filling lines in full synchronisation. You can also call this process hands-free.
A successful shrink sleeve labelling process involves two important stages: applying the sleeve onto the container and shrinking it to achieve the perfect clean fit. These stages can be carried out using a shrink sleeve applicator, a shrink tunnel, or a combination of both, depending on the production setup & required speed.
What Is a Shrink Sleeve Applicator Machine and How Does It Work?
A shrink sleeve applicator is a machine designed to automatically apply printed shrink sleeves onto bottles, containers, caps, preforms, and other packaging forms. The machine typically unwinds the sleeve film from a roll, goes over the mandrel, cuts it to the required length, and positions it accurately onto the container.
The applicator must be accompanied by a shrink tunnel. If a customer already has a suitable tunnel, the applicator can be supplied as a standalone machine and integrated with the existing setup, provided the tunnel is bought, keeping the applicator machine in mind to be bought later.
What is a shrink tunnel?
A shrink tunnel is used after the sleeve has been applied to the container manually. It provides controlled heat that causes the shrink film to contract/shrink and conform to the shape of the container.
Shrink tunnels may use different heating technologies, including electric or steam systems. The appropriate technology depends on the container shape, whether you are shrinking bottle-filled or emptying a bottle, and the desired finish.
How to finalize a perfect shrink tunnel?
The tunnel plays a major role in determining the final appearance of the sleeve.
A sleeve may be applied accurately but still produce a poor result if the shrinking conditions are not suitable. Excessive heat can cause distortion or affect the printed graphics, while insufficient heat may leave the sleeve loose with wrinkles.
Therefore, the tunnel must be selected according to the container shape, sleeve coverage, whether you are shrinking a bottle filled or empty, and production speed.
For further technical guidance, read this external article on choosing between steam and electric heat tunnels for shrink sleeve applications.
The final tunnel configuration should be confirmed through suitable testing with the actual container and sleeve combination.
How to Choose the Right Solution?
Before selecting a shrink sleeve applicator or tunnel, manufacturers should consider:
- Required production speed
- Container shape and dimensions
- Sleeve material and thickness
- Required sleeve coverage
- Production-line integration
- Changeover requirements
- Future production volumes
- Whether the container is filled or empty
Orianaa: Label and Machine Expertise Under One Roof
With more than three decades of experience in the packaging and labeling industry, Orianaa Decorpack combines label manufacturing expertise with machine solutions for shrink sleeve applications.
Its range includes automatic shrink sleeve applicators, electric and steam shrink tunnels, high-speed systems, preform application solutions, and integrated labelling setups.
To achieve better shrink quality, speed up the process, save labor, accuracy & synchronizing the process, Orianaa offers accessories such as Turn Table, Steam Generator, Air Knife, Dispenser & many more.
Conclusion
The right combination of shrink sleeve applicator machine, shrink tunnel, sleeve material, container specs, perfect KLD & distortion-free artwork can help achieve accurate application, consistent shrinking, reduced manual handling, and a professional finished appearance of the product. Such a finished product stands out on the cluttered shelves, increasing its point of purchase value. Team Orianaa, with 36 years of experience, helps you to achieve all this with ease.
Frequently Asked Questions
- Can an existing production line be upgraded with a shrink sleeve applicator?
Yes. A shrink sleeve applicator can often be integrated into an existing production line. Provided you had planned the applicator machine on paper at the time of buying the tunnel. - What happens if the sleeve is not centered correctly on the bottle?
Incorrect centring can result in uneven coverage, misplaced artwork, or an inconsistent finished appearance. Proper bottle handling, sleeve dimensions, proper KLD, distortion-proof artwork, and machine setup help to get a perfectly decorated finished product. - Does the sleeve design need to be finalized before selecting the machine?
It is strongly recommended. Sleeve dimensions, material, application height, container geometry, and other design parameters can affect machine configuration and tunnel requirements. Evaluating these factors early helps ensure proper equipment selection. - How to choose the best auto applicator & tunnel machine manufacturer?
Look for a manufacturer with proven experience, reliable machines, customization options, strong after-sales support, and expertise in both sleeves and application technology. With over three decades of experience in labeling, Orianaa Decorpack offers shrink sleeve applicators, shrink tunnels, and integrated solutions tailored to specific production requirements.
