Release liner

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A release liner is a plastic-based paper or sheet (usually used during the manufacturing process) used to prevent sticky surfaces from precipitating. Coated on one or both sides with a release agent, which provides a release effect on all types of sticky materials such as glue or mastic. The release liner is available in different colors, with or without printing under low surface energy coating or on the back of the liner. Release is liner separation from sticky material; liner is the carrier for the release agent.

Video Release liner

Industrial segmentation

Globally there are about 400 and 500 companies involved in manufacturing or dealing with liner release products on an industrial scale. In general there are two types of companies that produce liner release.

Liner manufacturer

Commercial coating companies deal with many different end uses of this industry. They provide unique solutions to their customers, based on various substrates and unlimited release agent combinations with special properties. Commercial coaters usually do not make the finished product, only the release liners themselves and then their customers will coat the sticky material on this liner and then apply the final product into it.

In-house Manufacturer

A manufacturer at home makes release liners and uses them internally to produce the final product. Internal manufacturers usually focus on a very narrow product range eg. labels or tapes. They use substrates and release materials in limited quantities, devoted to their final applications.

Maps Release liner

Liner material

As a "Liner" material, the industry uses a variety of substrates called, which are carriers of the release agent and necessary to transport sticky material from the manufacturer to an industrial or personal end user. Typical liner materials are:

Paper

Paper

1. SCK = Kraft Super Calendar Paper, commonly used for Labels in the US
2. Glassine = Also a SCK paper but usually with a Polyvinyl PVOH top layer of alcohol, usually used for Label in Europe
3. CCK = Clay-Layered Kraft Paper or also simply called layered paper
4. MFK = Finished Paper Kraft Paper, which is paper because it comes from a standard paper machine
5. MG = Paper Tinted paper which is a coated paper eg on a yankee cylinder from a paper machine.

Plastic film

1. BO-PET: PET film (biaxial oriented) is a very hard and temperature resistant film layer.
2. BOPP: PP oriented PP movie
3. Other Polyolefin: usually made of HDPE, LDPE, PP plastic resin

Plastic films are generally made by plastic extrusion process from plastic resins and can be made from a single type of plastic material, a mixture of various plastic materials or multilayered coextrusions. Provide them with unique and customized features for the applications they are targeting.

More

• Poly-coated Kraft paper, which is usually a MFK paper that has on one or both sides of the olefin poly layer, to make it very smooth, moist and stable in dimensional manner
• Pol-coated BO-PET film, which has been like paper coated on both sides with a polyolefin material. In this way PET films are hard and stable dimensions combined with cheap polyolefin resins which make charging the web a better carrier for special applications.

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Release agent

Commonly used release agents for release liners can be crosslinked silicone, other coatings, and materials that have low surface energy.

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Apps

There may be hundreds of different applications, in which the release liner material is used. As

• Pressure sensitive label
• Pressure-sensitive tape
• Plastic adhesive sheets

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See also

• Pressure sensitive adhesive

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References

Source of the article : Wikipedia