Release Liner
PE-Coated Kraft Release Paper (PEK)
Kraft paper sealed with polyethylene and finished with silicone — a flat, moisture-resistant paper liner widely used for transfer tapes, double-sided tapes and die-cut converting.
What it is
PE-coated kraft release paper — often called PEK or poly-coated kraft — is a kraft paper base sealed with a polyethylene (PE) layer, typically on both faces, and finished with a silicone release coating. The PE closes the paper's surface, giving a smooth, even base for the silicone and a barrier against moisture.
The result is a paper liner that behaves much more like a film: it lies flat, resists curl in humid conditions and releases consistently, while keeping the stiffness, tear resistance and cost advantage of paper over film. It is a long-established workhorse for transfer tapes, double-sided tapes and die-cut converting.
Construction
- Silicone release coating
- PE layer
- Kraft paper
- PE layer
When to choose it
- You want paper-liner economics with film-like flatness and stability
- Liners are stored or used in humid, tropical conditions where plain paper curls
- You make transfer, double-sided or foam tapes that go on to die-cut converting
- Converters need a stiff, tear-resistant liner for rotary and flatbed die-cutting
- A smooth, sealed surface is needed for an even, predictable release
Key properties
- PE barrier limits moisture pick-up and curl
- Smooth, sealed surface for uniform silicone coverage
- Good stiffness and tear resistance for converting and dispensing
- Easy to tight release, single- or double-side silicone
- Lies flat for sheeting and die-cutting
- Suited to moderate process temperatures — PE softens under high heat
Typical applications
- Transfer (adhesive-only) tapes
- Double-sided tissue, film and foam tapes
- Die-cut gaskets, pads and labels
- Self-adhesive foam and rubber sheets
- Industrial labels and graphic films
- Hygiene products such as diapers and sanitary pads
Configured to your needs
- Paper and PE weight to suit stiffness and handling
- PE on one or both faces
- Single- or double-side silicone, including differential release
- Release level — easy, medium or tight
- White or coloured base, gloss or matte finish
- Slit to width, sheeted or die-cut
Built to your specification — tell us your requirements and we'll confirm the construction and lead time.
Release liner families
Need this liner to your spec?
Send us your adhesive, process and the release you need — we'll recommend the right construction and convert it to your width or shape.