What is pressure-sensitive labelling?

Pressure-sensitive labelling in one answer

Pressure-sensitive labelling is the automatic or semi-automatic application of a pre-gummed label that bonds when controlled pressure brings it into contact with the pack. The label travels on a release liner, passes a sensor and is separated at a peel plate or dispensing edge. The product must then be presented so the label lands in the correct position and is wiped, rolled or pressed down consistently.

How does pressure-sensitive labelling work?

A reel of converted labels is unwound through a controlled web path. A label sensor identifies the gap or registration feature, while a product sensor or machine cycle determines when dispensing should begin. The liner changes direction over the peel edge, causing the stiffer label to continue towards the product. The used liner is then rewound.

Dispensing is only part of the process. The final result depends on the way the pack is transported, spaced, orientated and stabilised. A round bottle may be rotated while the label wraps around the circumference. A flat or oval bottle may pass between side guides and separate front and rear heads. A carton or pouch may be presented beneath a top applicator.

Which machine routes use pressure-sensitive labels?

These are process routes rather than guaranteed machine specifications. The actual equipment must be checked against the intended products, label rolls and line conditions.

How does pressure-sensitive labelling compare with other methods?

Common buyer questions

Is self-adhesive labelling the same as pressure-sensitive labelling?

In packaging machinery, the terms are commonly used for the same general process: a label with a pre-applied adhesive is removed from a release liner and pressed onto the pack. The exact label construction and adhesive still need to be matched to the product surface and operating conditions.

Does pressure-sensitive labelling need heat?

The basic application process does not require a heat-shrink tunnel. Some label materials, adhesives or production environments may still have temperature requirements, so the pack and label stock should be assessed in their real application condition.

Can clear labels be pressure-sensitive?

Yes. Clear film labels can use pressure-sensitive adhesive, but transparent label and liner combinations may need a sensing method proven against the finished roll. The final appearance also depends on surface cleanliness, bubbles, wipe-down and the colour or texture behind the label.

Can pressure-sensitive labels carry variable data?

They can be pre-printed and coded inline, or printed immediately before application in a print-and-apply system. The correct route depends on how much data changes, where it originates and whether the print and applied label must be verified.

Information to provide before a pressure-sensitive labelling enquiry

• Product shape, material, smallest and largest dimensions, filled condition and stability.
• Required label position, number of labels and relationship to handles, seams, panels or existing print.
• Label size, material, liner, gap, core, outside roll diameter and unwind direction.
• Normal output, batch size, changeover frequency and surrounding conveyor or machinery.
• Coding, inspection, reject, guarding, cleaning and environment requirements.
• Representative products and a finished production label roll where possible.