What is a Release Liner?

A release liner is a protective backing material used on adhesive products such as double-sided tapes, self-adhesive labels, stickers and adhesive films. Its purpose is to protect the adhesive surface and prevent it from sticking to unwanted surfaces before application.

Release liners are typically made from silicone-coated paper or plastic film, which allows them to be easily peeled away from the adhesive without damaging it or leaving residue.

When the adhesive product is ready to be used, the release liner is removed to expose the sticky surface.

Common Types of Release Liners

  • Silicone-Coated Paper: Commonly used for adhesive labels, stickers and double-sided tapes.
  • Glassine Paper: A smooth, dense paper commonly used as a release liner for self-adhesive labels.
  • Polyethylene (PE) Film: A flexible plastic release liner used for various adhesive products.
  • Polyester (PET) Film: A strong, dimensionally stable plastic liner often used for industrial adhesive tapes and films.

Common Applications

Release liners are widely used in the packaging, labelling and manufacturing industries, including:

  • Double-Sided Adhesive Tape: Protects one adhesive side until the tape is ready to be applied.
  • Self-Adhesive Labels: Acts as the backing material that carries labels until they are peeled off and applied.
  • Adhesive Sheets and Films: Prevents adhesive surfaces from sticking together during storage and handling.
  • Die-Cut Adhesive Products: Supports adhesive shapes during cutting, transport and application.

Why Are Release Liners Important?

Release liners help keep adhesive products clean, protected and easy to handle. They prevent premature adhesion, allow adhesive products to be stored and transported safely, and make application easier.

In simple terms, a release liner is the removable backing paper or plastic film that protects a sticky adhesive surface until it is ready to be used.