When working on a new project there are many different factors to consider. What is the end application, how is the tape or label applied/hand or machine, as well as the function of the adhesive. Does the customer need a permanent , removable or repositionable adhesive? Even though all these specifications are important finding the correct release liner is by far the most crucial. The release liner is responsible for not only carrying the adhesive, but acts as a barrier until the product is being utilized in its intended application. Choosing the wrong adhesive release liner could jeopardize the entire application. Release Liners are measured on a scale from 1-10 by most manufacturers. This numerical rating system measures how tightly the adhesive is expected to adhere before it releases when the liner is being removed by an outside force. Liner Manufacturers can manipulate and control release levels by adding a release additive at different levels when manufacturing the liner. Having the wrong release can show up in your processes in a few different ways. A few of the most common are detailed below:
- Tunneling – Commonly caused by dimensional changes; Tunneling can occur when the liner is coated and placed into the warehouse for storage.
At this time a collection of moisture causes the liner to swell and create tunneling on the adhesive material
- Adhesive Lock Up – This liner issue occurs when the wrong adhesive/liner combination is chosen resulting in the face stock not releasing from the
- Tight Release – This occurs when the wrong release is chosen resulting in the inability of the liner to be released from the adhesive. Often times a flexographic printer will experience matrix breaks or slowed production efficiencies.