The label is a product's face on the shelf. A label that lifts, slips or wrinkles damages brand perception. The right adhesive keeps the label in place from filling to consumer.
Labelling technologies
Cold glue (dispersion/casein): the traditional method for paper labels on glass bottles. Good grab even on wet, cold bottles, and easy wash-off for returnable bottles.
Hot melt (roll-fed / wrap-around): used for plastic wrap-around labels on PET bottles. Lead and trail edges are bonded with thin hot melt beads, suitable for very high speeds.
PSA (self-adhesive labels): pressure-sensitive adhesive coated on the back during label production; common for cosmetics, chemicals and logistics.
Selection criteria
| Criterion | What to watch |
|---|---|
| Surface | Glass, PET, PP, HDPE and board need different adhesion |
| Container condition | Wet, cold or condensing bottles need special grades |
| Line speed | Short open time and good machining at high speed |
| Cold chain | Flexibility at low temperature for frozen goods |
| Recycling | The label must release from the bottle (PET recycling) |
Common problems
- Label slip: insufficient initial tack or wet bottles.
- Flagging: label edges lifting on curved surfaces; needs a higher-tack adhesive.
- Stringing: wrong hot melt temperature or viscosity.
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