Drytac explains why high-quality release liners are crucial to easy printing and installation.
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Authored by D’Arcy Lewis, Technical Sales Manager, at Drytac.
When installing self-adhesive graphics, the last thing you probably think about is the remnants you throw away. However, the quality of these remnants – better known as release liners – can make a significant difference to the printing and installation process of a graphic, and the end result.
Release liners are a critical feature of self-adhesive print media. They are a key component for the delivery of the product and the application performance, but as they are ultimately disposed of they are often perceived as being of low value. That couldn’t be further from the truth. By spending just a few more pence or cents on a graphics solution with a high-quality release liner you can save yourself a lot of hassle, time and – ultimately – money.
Typically paper-based (although they can be made of Polyester/Polypropylene), release liners are usually applied during the manufacturing process of print media, including films made from PVC, polyester, polypropylene and synthetic paper. Coated on one or both sides with a release agent, they are used to prevent the sticky surface of a substrate from adhering prematurely or to the wrong surface.
There are a number of key aspects of release liners that can affect their compatibility for a job. For example, some printers use extreme heat which can shock cheaper liners, potentially causing cockling or head strikes. Using a higher-quality PE-coated liner will help the material lie flat during the printing cycle.
A thicker release liner is also required to stabilise thin materials during printing. For instance, a 50-micron/2 mil polyester would normally be too delicate, but the correct release liner enables their use.
In addition, optically clear materials require an opaque or white liner so machines can see the materials and print on them.
A good liner will also add stability during cutting, especially on integrated printer/cutters where the material is gripped by pinch rollers. These machines truly whizz the material around, so the liner has to grip to give accurate cut lines.
The weight will also influence installation; a heavier release liner will help the graphics lay flat to ensure a much easier installation process. Air release liners have added technology to make materials easy to use: tiny channels which enable air to flow and not get trapped between the material and surface, which would otherwise create bubbles. Standard PVC is not porous so this release paper technology makes graphics materials, particularly those used in vehicle wrapping, more forgiving.
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Paper absorbs and disperses moisture from the air, always trying to achieve a balance. This constant change, due to the environment, can cause lay-flat challenges. Moisture stable release papers overcome this challenge. They are coated on both sides with polyethylene which inhibits the absorption of moisture and eliminates changes in the paper’s profile. The paper is then siliconized on the adhesive receptive side.
All Drytac’s products with release liners are designed to tick every box for higher quality. Only dimensionally stable base papers are used, with two-sided PE coating for moisture stability. Silicone, adhesive and paper chemistries are specially formulated to eliminate tunnelling of the media and to work with Drytac’s adhesive solutions.
For something that is usually considered waste and is thrown away, a lot of technology goes into good-quality release liners. Spending a little more on a better product will prevent printer damage, reduce downtime and speed up the installation process, making the job easier and cheaper in the long run.
When working with sensitive adhesives or precision electronic components, even microscopic silicone transfer can lead to contamination or product failure. Our ARclean® Specialty Release Liners are designed to meet the strictest cleanliness and extractables standards demanded by medical, pharmaceutical, and electronics manufacturers.
These high-performance release liners control silicone migration, surface energy, and release force to ensure clean separation without residue. Whether used for wound care dressings, diagnostic devices, semiconductor materials, or precision adhesive laminations, our liners provide stable, predictable release performance that protects product quality and process integrity.
Designed for advanced electronic and semiconductor applications, these liners maintain less than 30 ng/cm² extractable silicones. They prevent contamination in ultra-clean assembly processes and provide consistent, easy-to-medium release forces. Our W- and W- grades are commonly used where even trace-free silicone levels can impact performance or yield.
These liners provide clean release for silicone-based adhesives and coatings. Used as secondary or lay-in liners, they are particularly suited to applications in medical device production, electronics assembly, and other settings where controlled release of silicone materials is required.
All ARclean® Specialty Release Liners are manufactured using solvent-free processes and platinum-catalyzed chemistries to deliver uniform coating, low extractable levels, and precise release force control.
Every sensitive application requires precise matching between adhesive chemistry, liner coating, and process conditions. We collaborate closely with your formulation and process teams to identify the right liner specification for your system, whether targeting extractable limits, adhesive compatibility, or peel strength consistency.
Our testing laboratories can measure silicone transfer, extractable levels, and surface energy performance to verify liner suitability for your process. If standard products do not meet your cleanliness or release profile requirements, we can develop custom coatings or base films tailored to your substrate and adhesive system.
Contact us to discuss your requirements of PET Liner For Electronics. Our experienced sales team can help you identify the options that best suit your needs.