| Types | Sleeve, hot melt glue OPP, rotary sticker, self-adhesive |
| Throughput | Matched to the filler, with an accumulator between |
| Key control | Label position, glue pattern, shrinkage, adhesion |
| Wetted parts | OPP film, PVC or PETG sleeve, paper sticker |
| Key decision | Full sleeve or partial wrap |
| Line position | After filling, before packing |
A consistent shrink needs the right film direction, a controlled tunnel temperature profile and a bottle that does not deform. Steam tunnels give a softer shrink than hot air and suit thin-wall bottles. A wrinkle at the shoulder is usually a film or temperature issue, not a speed issue.
Hot melt glue is applied at the leading and trailing edge and at the seam. The pattern, the pot temperature and the nozzle condition decide how much is used and how clean the bottle looks. Glue strings and smears are the usual complaint, and they come from temperature and nozzle wear.
| Label type | Cost per unit | Best for |
|---|---|---|
| OPP wrap-around | Lowest at volume | High-speed round bottles |
| Full-body sleeve | Higher film cost | Full coverage and shaped bottles |
| Self-adhesive sticker | Middle | Short runs and flat or curved panels |
| Paper label with glue | Low material, slower | Glass bottles and craft products |
Rated output, change parts and services are listed on the Rotary Sticker Labeling page.
After the filler and before the packer, normally with an accumulator on each side. The labeller is the most frequent short-stop on many lines, so the accumulator size in front of it decides whether a label roll change reaches the filler or not.
Rated output, change parts and services are listed on the Sleeve Labeling page.
A consistent circumference and no sharp undercut where the film cannot follow. Sleeves shrink around the shape, so a bottle with a deep waist needs a film with the right shrink direction. The bottle and the sleeve are designed together.
The same question is worked through from another angle in How Labeling Accuracy Impacts Beverage Brand Image.
Because a missing or skewed label is a customer reject that the line cannot see. A camera at the labeller outlet with a reject gate catches it at the source, before the packer hides it inside a case.
It is matched to the filler, typically with margin above the filler rating so that a short stop does not reach the filler. The practical limit is the shrink tunnel dwell time, not the sleeve applicator.
Usually uneven tunnel temperature, wrong film orientation, or a bottle that is still warm from filling. Check the tunnel profile and the film direction before changing the speed.
Not without a change of the applicator. Sleeve and wrap-around are different machines with different film paths, so a plant running both normally has two labellers.
At high volume, an OPP wrap-around label usually is, because the film is thinner and the machine runs faster. A sleeve costs more per unit but covers the whole bottle and allows full-body design.
Hot melt glue applied at the leading edge, the trailing edge and the seam. The pattern and the pot temperature decide both the bond and how clean the bottle looks.
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