A release liner or release paper is a paper or plastic-based film sheet (usually applied during the manufacturing process) used to prevent a sticky surface from prematurely adhering. It is coated on one or both sides with a release agent, which provides a release effect against any type of a sticky material such as an adhesive or a mastic. Release liners are available in different colors, with or without printing under the low surface energy coating or on the backside of the liner. Release is separation of the liner from a sticky material; liner is the carrier for the release agent.
Roll of die-cut pressure sensitive labels on a release liner
Globally there are between 400 and 500 companies involved in making or dealing with release liner products on an industrial scale. In general there are two types of companies which are manufacturing release liner.
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 do not make finished products, 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
An in-house producer makes the release liner and uses it internally to manufacture the final product. In-house producers are typically focused on a very narrow range of products e.g. labels or tapes. They use a limited amount of substrates and release materials, which are specialized for their end applications.
Liner materials
As 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:
Plastic films in general are made out of plastic resins by a plastics extrusion process and can be made out of one single type of plastic material, a blend of different plastic materials or 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, to make them very smooth, moisture resistant and dimensionally stable.
Poly coated BO-PET film, which is a BO-PET film that 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 film 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.
Applications
There are probably hundreds of different applications, where release liner materials are being used. Such as
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This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Release liner news newspapers books scholar JSTOR April 2022 Learn how and when to remove this template message A release liner or release paper is a paper or plastic based film sheet usually applied during the manufacturing process used to prevent a sticky surface from prematurely adhering It is coated on one or both sides with a release agent which provides a release effect against any type of a sticky material such as an adhesive or a mastic Release liners are available in different colors with or without printing under the low surface energy coating or on the backside of the liner Release is separation of the liner from a sticky material liner is the carrier for the release agent Roll of die cut pressure sensitive labels on a release liner Contents 1 Industry segmentation 1 1 Liner producer 1 2 In house producer 2 Liner materials 2 1 Paper 2 2 Plastic film 2 3 Others 3 Release agents 4 Applications 5 See also 6 ReferencesIndustry segmentation EditGlobally there are between 400 and 500 companies involved in making or dealing with release liner products on an industrial scale In general there are two types of companies which are manufacturing release liner Liner producer Edit 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 do not make finished products 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 Edit An in house producer makes the release liner and uses it internally to manufacture the final product In house producers are typically focused on a very narrow range of products e g labels or tapes They use a limited amount of substrates and release materials which are specialized for their end applications Liner materials EditAs 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 Edit Main article Paper SCK Super calendered Kraft paper typically used for labels in the USA Glassine Is also a SCK paper but typically with a polyvinyl alcohol PVOH top coat typically used for labels in Europe CCK Clay coated Kraft paper or also just called coated paper MFK Machine finished Kraft paper which is the paper as it comes from a standard paper machine MG Machine glazed paper which is a paper which has been glazed e g on a Yankee cylinder of a paper machinePlastic film Edit 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 polyolefins typically made out of high density polyethylene HDPE low density polyethylene LDPE PP plastic resinsPlastic films in general are made out of plastic resins by a plastics extrusion process and can be made out of one single type of plastic material a blend of different plastic materials or multilayered coextrusions Providing them with unique and adjusted features for the application that they are targeted for Others Edit Poly coated Kraft papers which are typically MFK papers which have a polyolefin coating on one or both sides to make them very smooth moisture resistant and dimensionally stable Poly coated BO PET film which is a BO PET film that 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 film a better carrier web for specialty applications Release agents EditCommonly used release agents for release liner can be crosslinkable silicone other coatings and materials that have a low surface energy Applications EditThere are probably hundreds of different applications where release liner materials are being used Such as Pressure sensitive labels Pressure sensitive tape Self adhesive plastic sheet Embossed release paper known as casting paper is used in the manufacture of textured materials including bicast leather and artificial leather 1 See also EditPressure sensitive adhesiveReferences Edit About Castingpapers CASTING PAPERS R series www castingpapers com Retrieved 2022 03 26 Retrieved from https en wikipedia org w index php title Release liner amp oldid 1082522367, wikipedia, wiki, book, books, library,
