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{{more citations needed|date=April 2022}}
A '''Release liner''' is a paper or plastic based carrier web material, which is [[coating|coated]] on one or two sides with a [[release agent]], which provides a release effect against any type of a sticky material such as an [[adhesive]] or a [[Mastic (plant resin)|mastic]]. Release liner are available in different colors, with or without printing under the silicone or on the backside of the liner. ''Release'' is separation of the liner from a sticky material. a ''liner'' is the carrier for the release agent.▼
[[File:"WIN" stickers.JPG|thumb|280px|Roll of die-cut pressure-sensitive labels on a release liner]]
▲A '''Releaserelease liner''' or ''release paper'' is a paper or plastic -based carrierfilm websheet material,(usually whichapplied during the manufacturing process) used to prevent a sticky surface from prematurely adhering. It is [[coating|coated]] on one or twoboth sides with a [[release agent]], which provides a release effect against any type of a sticky material such as an [[adhesive]] or a [[Mastic (plant resin)|mastic]]. Release linerliners are available in different colors, with or without printing under the siliconelow [[surface energy]] coating or on the backside of the liner. ''Release'' is separation of the liner from a sticky material. a; ''liner'' is the carrier for the release agent.
 
==Industry segmentation==
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=== Liner producer ===
[[File:Band-Aid close-up.jpg|thumb|An [[adhesive bandage]] with a release liner partially removed]]
Commercial coating companies, deal with a lot of different end uses of this industry. They provide unique solutions to their customers, based on a wide variety of substrates and an endless combination of release agents with specialized properties. Commercial coaters usually makedo nonot make finished products, but just the release liner itself and then their customers will coat a sticky material on this liner and then apply the end product to it.
 
=== In-house producer ===
InAn in-house producer makemakes the release liner and useuses it internally to manufacturermanufacture the final product. In-house producerproducers are typically focused on a very narrow ragerange of products e.g. Labelslabels or Tapestapes. They use a limited amount of substrates and release materials, which are specialized for their end applications.
 
==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 Calanderedcalendered]] 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 onepolyolefin 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==
Commonly used release agents for release liner can be crosslinkable [[silicone]], other coatings, and materials that have a low [[surface energy]].<ref>{{cite journal
| last = Tučeková
| first = Zlata Kelar
| title =Adhesive Properties of Silicone-Coated Release Liner Paper Enhanced by Atmospheric Pressure Plasma Pre- and Post-Treatment
| journal =Coatings
| volume =10
| issue =11
| pages =
| date =2020
| url = https://www.mdpi.com/2079-6412/10/11/1102
| access-date = 27 April 2024
}}</ref>
 
==Applications==
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There are probably hundreds of different applications, where release liner materials are being used. Such as
 
#* pressurePressure-sensitive [[label]]s==See also==
* [[Pressure -sensitive adhesivetape]]
* [[Self-adhesive plastic sheet]]
* {{anchor|casting paper}}Embossed release paper known as '''casting paper''' is used in the manufacture of textured materials, including [[bicast leather]] and [[artificial leather]]<ref>[https://customstickers.com/community/blog/what-is-the-difference-between-kiss-cut-and-die-cut-stickers Die Cut vs Kiss Cut Stickers]</ref>
 
==See also==
* [[Pressure-sensitive adhesive]]
 
==References==
{{reflist}}
 
{{DEFAULTSORT:Release Liner}}
[[Category:Adhesives]]
 
[[ja:剥離はくり紙し]]
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