Fluoro Silicone PET Release Liner

Protective Film Factory is a fluoro silicone pet release liner manufacturer for silicone PSA and difficult silicone-based adhesive systems that ordinary silicone release films may not release consistently. This fluorosilicone coated PET liner is made for controlled high/low release grades, typical 1-300 g/25 mm release force range, aging test verification, and residual adhesion retention. It helps maintain clean peeling and stable liner hold during coating, lamination, slitting, and die-cutting after dwell time, pressure, or heat exposure.

Product Overview

A fluoro silicone pet release liner is not a general transparent easy-peel PET film. Its working layer is the fluorosilicone coating, typically controlled around 0.2 um-0.6 um, which is designed to release silicone-based pressure sensitive adhesives with more predictable behavior. This matters when the adhesive is soft, tacky, heat-resistant, or difficult to peel from ordinary release surfaces.

As a PET liner for silicone adhesive, it is used with silicone PSA, soft silicone gel, medical adhesive layers, thermal pad adhesive constructions, and high-temperature silicone adhesive systems. The key question is not only whether the liner can be peeled away, but whether the adhesive keeps its surface quality after storage without tack loss, adhesive lift, coating transfer, or liner lock. Release grade should be confirmed with the actual adhesive formula, because direct coating often gives tighter release than dry lamination, and BPO-cured and platinum-cured silicone PSA may behave differently.

Benefits

• Supports controlled silicone adhesive release for silicone PSA, silicone gel, and difficult adhesive systems.
• Provides low release at 1-10 g/25 mm, medium release at 10-50 g/25 mm, and high release at 50-300 g/25 mm as typical ranges.
• Helps reduce adhesive lock, adhesive lift, coating transfer, and unstable unwind during coating or converting.
• Maintains useful residual adhesion/SAS, typically targeting >=85% when the liner is correctly matched.
• PET base film improves roll flatness, slitting stability, and die-cut dimensional control.
• Supports aging checks such as 24-72 h dwell and 70 C x 24 h heat exposure to observe release force drift.

How should aging and residual adhesion be checked before using fluoro silicone pet release liner?

For silicone-based PSA systems, the first peel result is only a starting point. A practical aging test for a fluoro silicone pet release liner should include initial release force, release after 24-72 h dwell, and release after heat aging such as 70 C x 24 h when the finished part may face heat, pressure, or long storage. The test should confirm whether peeling remains smooth and whether release force drift stays within a controlled range, such as a target <=30% when the liner and adhesive are well matched.

TDS

Applications

• Silicone PSA transfer coating and dry lamination where release behavior may change by process route.
• Medical silicone adhesive dressings, patches, and skin-contact adhesive layers requiring residual adhesion/SAS retention.
• Soft silicone gel adhesive films that need smooth peeling without adhesive lift after dwell.
• High-temperature silicone adhesive tapes and insulation adhesive structures checked after heat aging.
• Electronic die-cut silicone adhesive parts where liner hold must stay controlled during waste removal.
• Thermal pad, silicone rubber, and silicone foam adhesive constructions with difficult release behavior.

What release grade is suitable for silicone PSA: low release or high release?

The right release grade depends on adhesive tack, coating weight, peel speed, liner contact time, storage condition, and whether the adhesive is cast directly onto the liner or laminated later. A fluorosilicone coated PET liner with low release grade, typically 1-10 g/25 mm, is useful when the adhesive surface is delicate and smooth peeling is needed. Medium release, around 10-50 g/25 mm, is often tested when both peel smoothness and liner hold are required. High release, around 50-300 g/25 mm, is better when the adhesive has strong wet-out, high tack, or needs tighter hold during storage, die cutting, matrix removal, or roll handling.

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FAQ

Q1: Is this the same as ordinary silicone coated PET release liner?

No. It uses fluorosilicone coating and is designed for silicone adhesive release, not general acrylic PSA release.

Q2: Can the release force be adjusted?

Yes. Low, medium, and high release grades can be matched according to the actual adhesive system.

Q3: Why is residual adhesion important?

Residual adhesion shows whether the adhesive keeps bonding strength after peeling from the liner.

Q4: Should samples be tested before bulk use?

Yes. Aging test, release force, residual adhesion, and coating transfer should be checked with the actual silicone adhesive formula.