Paper versus PET release liners

Release-liner choice combines substrate behaviour, release coating and conversion requirements. Neither paper nor PET establishes release force by itself.

Application-dependent comparison with no universal winner. General information for preliminary evaluation; not independently reviewed or certified. Confirm grades, standards and suitability with the manufacturer for your application.

Compare the right functions

Release-liner choice combines substrate behaviour, release coating and conversion requirements. Neither paper nor PET establishes release force by itself.

Technical distinction and test basis

Decision	Paper-based liner	PET-film liner
Construction	Paper grade and surface preparation plus release coating	Polyester film plus surface preparation and release coating
Dimensional behaviour	Assess humidity and converting history	Assess thermal and tension history for the specified film
Conversion	Check stiffness, flatness, die cutting and fibre contamination	Check static, stiffness, gauge and cutting behaviour
Release measurement	Use the actual adhesive, ageing and peel procedure	Use the same adhesive, ageing and peel procedure
End-of-life claim	Verify the coated construction and actual collection route	Verify the coated construction and actual collection route

Qualification and purchasing decision

Match the adhesive, release chemistry, coating side, peel speed, angle and conditioning. Compare aged release and residual adhesion, then trial winding and die cutting. Liner thickness, nominal substrate family or a single release value cannot establish interchangeability.