Do label materials and adhesives affect a container’s recyclability?

Yes, label materials and adhesives can significantly affect a container’s recyclability, since a label made from a different plastic than the container, or an adhesive that does not separate cleanly during recycling, can contaminate the recycling stream or cause the container to be misidentified during automated sorting.

Recycling facilities commonly use optical sorting technology to identify container material and colour, and a label that covers a large portion of the container, especially in a different colour or material than the container itself, can interfere with this sorting process, potentially causing a recyclable container to be misdirected. Beyond sorting, the label material’s compatibility with the container’s recycling stream matters during reprocessing: a label made from the same resin family as the container, as with in-mould labelling, poses no separation issue, while a label made from an incompatible plastic or from paper can require separation before the container material can be reprocessed cleanly.

Adhesive residue is a further consideration, since some adhesives leave a sticky residue on the container even after the label is removed, which can affect the quality of recycled material if not adequately cleaned during processing. Water-soluble glues, as used in wet glue labelling, are generally considered favourable for recycling since they wash away cleanly during the hot-wash stages many recycling processes include, particularly for glass. Brands aiming to support recyclability typically consider label material compatibility, coverage area, and adhesive type together as part of overall packaging sustainability planning, rather than treating the container and label as separate recyclability questions.