How are shrink sleeve labels applied to bottles and containers?

Shrink sleeve labels are applied by sliding a pre-formed film tube over the container using a sleeve applicator, then passing the sleeved container through a heat tunnel that uses steam or hot air to shrink the film tight against the container’s shape.

The process starts with the sleeve manufacturer forming and seaming flat printed film into a continuous tube slightly larger in diameter than the container. On the bottling or packaging line, an automated sleeve applicator cuts individual sleeves from a reel and places them over each container at high speed, positioning the sleeve so any tear-perforation or design element lines up correctly with the container’s neck, label panel, or cap.

After placement, containers move through a shrink tunnel. Steam tunnels can deliver fast, even heat transfer, while hot-air systems may be selected where steam infrastructure is not available; both require calibration to the film and container. Standard transverse-direction sleeves shrink mainly around the container circumference, with machine-direction movement controlled and usually much lower; machine-direction sleeve constructions also exist for specialised applications. Line speed, temperature, dwell time, and container geometry should be validated together before full production.