At this very moment, as you swipe your phone screen, an invisible force is tightly holding together every layer of material in your device—that’s OCA optical adhesive working silently.

Few people realize that, from high-end smartphones to flexible displays, the flawless integration of these device screens relies on a precise test: OCA peel strength testing.
In the era before professional peel testers, engineers often relied on experience and simple tests to judge the performance of OCA. This approach was like cooking in a kitchen without a thermometer—everything was based on intuition, and the results were unpredictable.

The working principle of modern OCA tape peel testers is truly remarkable. They can measure the force required to peel the adhesive from the substrate with a precision of 0.01 Newtons, while simultaneously recording the curve changes throughout the peeling process. These data may seem simple, but they are the lifeline of product quality.

“We once thought the OCA we were using was fully qualified, until the tester revealed the truth,” shared a quality control manager. “For the same batch of materials, the peel strength varied by up to 18% under different environmental conditions. This discovery made us completely revise our storage standards.”

These instruments do more than just identify problems—they drive progress. By analyzing the data from peel tests, material scientists have developed new types of OCA with enhanced adaptability and durability, paving the way for breakthroughs in flexible display technology.