Automotive manufacturers and suppliers frequently use adhesive-backed materials in components that must withstand demanding production, storage, transportation, and installation conditions. Because automotive applications often require stronger-tack adhesives, the release liner must be carefully matched to the adhesive system. When release force is too high, removing the release liner can disturb the adhesive layer or potentially damage the product itself.
The Initial Automotive Release Liner Request
An automotive supplier contacted Fox River Associates regarding an adhesive-backed component used within a larger vehicle assembly. To protect the customer’s proprietary information, the specific component, adhesive chemistry, location within the vehicle, and final application will remain confidential.
The customer’s concern was that the existing release liner required too much force to remove from the adhesive-backed material. Assembly operators needed to use more force than anticipated during removal of the release liner. This created the possibility that the adhesive layer could stretch, lift, deform, or transfer unevenly. Excessive stress on the adhesive layer could potentially damage the finished component before installation.
Automotive adhesive systems commonly use higher-tack adhesives because the finished part may need to remain securely attached under vibration, temperature changes, moisture, and long-term operating conditions. These stronger adhesives can naturally create a more difficult release liner removal if the release coating and release liner construction are not appropriately matched.
Call Fox River Associates today at 1-800-647-6579 or fill out the form on this page for more information about release liners for your products.
Reviewing the Complete Material Construction
The customer initially requested a release liner that would be easier to remove. However, reducing release force without reviewing the overall construction could have created other concerns, including premature release liner separation during converting, packaging, shipping, or storage.
Fox River Associates worked with the supplier to evaluate several application variables:
- The general type and tack level of the automotive adhesive
- The amount of adhesive contact with the release liner surface
- The desired removal force during installation
- The size, shape, and flexibility of the finished product
- The method used to pull or peel the release liner
- The customer’s die-cutting and converting processes
- The temperatures encountered during production and storage
- The amount of pressure applied while the material was wound or stacked
- The required stability of the release liner during handling
This review confirmed that the adhesive needed to remain unchanged because its stronger tack was important to the final automotive application. The more appropriate approach was to modify the release liner construction so it would separate more cleanly from the adhesive.
Our Suggestion as the Release Liner Supplier
Fox River Associates recommended testing release liners with a release coating designed to provide a lower and more controlled release force against the customer’s existing adhesive.
The objective was not to make the release liner extremely easy to remove. If the release force became too low, the release liner could detach before the product reached the installation stage. Instead, our recommendation focused on creating a balanced release profile that protected the adhesive during manufacturing and storage while allowing controlled removal when needed.
The proposed construction was selected to provide:
- Reduced pulling force during release liner removal
- Less stress on the adhesive layer
- Lower risk of stretching or deforming the product
- Clean separation without adhesive transfer
- Stable performance during converting and die-cutting
- Sufficient release liner hold during packaging and transportation
- Compatibility with the customer’s stronger-tack automotive adhesive
We supplied samples so the customer could conduct testing with the actual adhesive-backed construction and existing production equipment.
Testing the Recommended Release Liner
The supplier tested the proposed release liners during converting, packaging, storage, and final removal. Operators compared the pulling force required with the previous release liner and examined the adhesive layer after removal.
The recommended release liner separated with noticeably less resistance while still remaining securely attached during earlier production stages. The adhesive surface retained its intended shape and coverage, and operators were able to remove the release liner without placing excessive force on the product.
Because release performance can change as adhesive constructions age, the customer also evaluated samples after a controlled storage period. This step helped confirm that the release liner would continue to provide an appropriate release level after the product had been packaged and stored.
The Solution and Outcome
Following the testing process, the automotive supplier approved the recommended release liner construction. The revised release liner is providing a more manageable and consistent release while supporting the stronger-tack adhesive required by the application.
The final results included:
- Easier and more controlled release liner removal
- Reduced risk of altering the adhesive layer
- Less potential for adhesive damage during release liner removal
- Clean adhesive exposure before installation
- Stable release liner performance during handling and storage
- Improved compatibility between the adhesive and release liner system
This project demonstrated why automotive release liner selection must account for the stronger adhesives commonly used in vehicle components. The adhesive may need significant tack for the finished application, but the release liner should still remove at a controlled force that protects both the adhesive layer and the product.
Automotive Release Liner Support from Fox River Associates
Fox River Associates works with automotive manufacturers, converters, and material suppliers to identify the appropriate release liner for specialized adhesive-backed applications. We evaluate release coating, base material, converting requirements, storage conditions, removal method, and adhesive interaction before recommending a construction.
Call Fox River Associates today at 1-800-647-6579 or fill out the form on this page for more information about release liners for your products.