PET Silicone Release Liner Technical Data

A release liner peel test checks how consistently a PET silicone release liner separates from a pressure-sensitive adhesive under controlled conditions. The value should not be read as regular tape peel strength. It should be reviewed with peel angle, test speed, sample width, dwell time, temperature, humidity, adhesive type, release side, residual adhesion, aged release force, release curve stability, and converting response. These technical data support release liner quality control for adhesive film lamination, precision die-cutting, waste stripping, optical adhesive handling, and stable roll unwinding.  These release-performance tests help identify the liner grade and production batch, but recycler acceptance requires a separate used PET liner waste qualification process covering polymer identity, contamination, packaging and trial approval. For readers comparing ordinary PE film, PET processing film, and PET silicone liner, this PE film, PET film and release liner test guide explains how peel adhesion, release force, residual adhesion, and sample trials should be separated.

What the Release Liner Peel Test Measures

A release liner peel test measures the force required to separate an adhesive layer from a silicone-coated PET release surface. Before comparing test values, review the release liner structure inside a self-adhesive laminate to distinguish liner release force from final adhesive peel strength. The result is affected by adhesive chemistry, silicone coating condition, PET film stiffness, contact pressure, dwell time, peel angle, peel speed, and aging history. It does not measure how strongly the adhesive bonds to steel, glass, acrylic, or another final substrate. For general silicone coated release liner supply covering PET or PE film structures, see Silicone Coated Release Liner Film.

For reliable release liner quality control, the adhesive used in testing should be close to the real adhesive construction. A liner that gives a smooth release value with one acrylic PSA may become too tight or too light with another adhesive system. The test record should therefore identify adhesive type, release side, dwell condition, aging condition, and test method.

For single-sided liners, the tested surface must be clearly marked. For double-sided or differential release liners, the easy-release side and tight-release side should be tested separately. Side confusion can lead to lamination error, unstable stripping, adhesive part movement, or unexpected release failure even when the average force appears acceptable.

Release Force Reference Bands

Release force should be selected according to adhesive behavior and converting risk. A very light liner may remove easily, but it can create pre-release or part lifting. A very tight liner may hold the adhesive well during storage, but it can cause high peak force, adhesive edge distortion, or stripping breakage.

For a PET-based liner product with silicone coating, release-force options and roll customization, review Silicone Coated PET Release Film.

90-Degree and 180-Degree Peel Test Conditions

A 180-degree peel test is widely used for release force comparison because the peeling path is stable and the central section of the sample can provide a reliable average value. A 90-degree peel test may be used when the separation path is more vertical, such as fixture-based removal, dispensing simulation, or selected lamination checks.

TDS / Technical Data Reference

Practical Control Targets for Release Data

A release value should not be approved by average force alone. The curve, peak force, aged release force, residual adhesion, and widthwise variation should be checked together.

Silicone Coating Anchorage, Curing, and Chemistry Control

Residual Adhesion and Silicone Transfer Data

Silicone Release Liner Temperature Aging

Die-Cutting, Waste Stripping, Lamination, and Unwinding Data

FAQ

1. What is a release liner peel test?

A release liner peel test measures the force needed to separate an adhesive layer from a release liner under defined conditions. A useful report should include peel angle, test speed, sample width, dwell time, temperature, humidity, adhesive type, average force, peak force, and release curve behavior.

2. What is a normal release force range for PET silicone release liner?

There is no universal value. As a practical reference, light release may be 3-15 gf/25 mm, medium release may be 15-50 gf/25 mm, and heavy release may be 50-120 gf/25 mm. Final limits should be confirmed with the actual adhesive and converting process. For roll supply, slitting, die-cutting and adhesive converting options, match the data with our PET release liners for industrial applications.

3. Why does release force change after temperature aging?

Release force can change because adhesive chemistry, pressure, heat, humidity, silicone cure, and coating anchorage continue to interact during storage. Silicone release liner temperature aging helps identify release growth, lock-up, force drop, silicone transfer, residual adhesion loss, and liner deformation.

4. Why is residual adhesion important for transparent adhesive structures?

Residual adhesion shows whether the adhesive still bonds properly after contact with the silicone release surface. Poor residual adhesion may indicate silicone transfer, incomplete curing, surface contamination, haze, fisheyes, or bonding loss after lamination.