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==Liner materials==
As "Liner"''liner'' material, the industry is using a wide variety of so-called substrates, which are the carrier materials of the release agent and which is needed to transport a sticky material from the manufacturer to an industrial or private end user. Typical liner materials are:
=== Paper ===
{{Main article|Paper}}
'''[[Paper]]'''
# SCK =- [[Calender#Supercalender|Super Calenderedcalendered]] Kraft paper, typically used for Labelslabels in the USA
# Glassine= - Is also a SCK paper but typically with a PVOH [[Polyvinylpolyvinyl alcohol]] (PVOH) top coat, typically used for Labelslabels in Europe
# CCK =- Clay Coatedcoated Kraft paper or also just called [[coated paper]]
# MFK =- Machine Finishedfinished Kraft paper, which is the paper as it comes from a standard paper machine
# MG =- Machine Glazedglazed paper which is a paper which has been glazed, e.g. on a yankeeYankee cylinder of a paper machine.
=== Plastic film ===
# BO-PET: a [[PET film (biaxially oriented)]] is a very high temperature resistant and tough film liner.
# BOPP: a biaxially oriented [[polypropylene]] (PP) film
# Other [[Polyolefinpolyolefin]]s: typically made out of [[high density polyethylene]] (HDPE), [[low density polyethylene]] (LDPE), PP plastic resins
Plastic films in general are made out of plastic resins by a [[plastics extrusion]] process out of plastic resins and can be made out of one single type of plastic material, a blend of different plastic materials or a multilayered coextrusions. Providing them with unique and adjusted features for the application that they are targeted for.
=== Others ===
* Poly coated Kraft papers, which are typically MFK papers which have a polyolefin coating on one or both sides a poly olefin coating, to make them very smooth, moisture resistant and dimensionally stable.
* A polyPoly coated BO-PET film, which hasis beena likeBO-PET afilm paperthat has been coated on both sides with a polyolefin material. This way the tough and dimensionally stable PET film is combined with cheap polyolefin resin which makes the fillfilm a better carrier web for specialty applications.
==Release agents==
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