Release liners are primarily classified into light, medium, and heavy types based on their release force (peel strength), controlled by adjusting the silicone coating amount. Light release (low release force) is suitable for ultra-low-tack materials or precision transfer applications, while heavy release (high release force) is suitable for high-tack double-sided tapes and composite material protection.
Light and heavy release liners are often used together to achieve special packaging requirements.
Types: Paper Release Liner, Film Release Liner, Double Release Liner
Properties: Stable release performance, Compatible with various adhesive systems, Multiple thickness options available, Custom printing available
Paper Release Liner
PropertiesRequires less force to remove; low release force (typically in the ultra-low range).
ApplicationsUsed on the first side of the release layer to ensure adhesive is not pulled away when peeled; suitable for initial transfer of tapes and protective films; ideal for protecting fragile materials.
AdvantagesEasy to peel, ensuring the adhesive surface is not damaged by excessive peel force.
Film Release Liner
PropertiesRequires greater force to remove; high release force.
ApplicationsUsed for the back (second side) protection of double-sided tapes and labels to prevent accidental peeling during processing; suitable for high-tack materials to provide sufficient grip to protect the adhesive.
AdvantagesPrevents accidental material separation and provides strong structural support.
Combined Properties and Applications
StructureRelease liners consist of a base material (such as paper or PET) coated with a release agent (silicone).
Double-Sided ApplicationsMany double-sided tapes are configured with one light-release side and one heavy-release side to ensure the correct usage sequence is maintained, known as the "light/heavy release configuration."
Influencing FactorsThe magnitude of release force is influenced by the silicone formulation, coating weight, and curing temperature.
Summary
Light Release
Low tack requirement, easy peeling, suitable for films and precision processing.
Heavy Release
High tack requirement, requires more force to peel, suitable for thick adhesives and composite materials.
