Peeling Test / Adhesion Test / Peeling Test

In this test, an adhesive strip was stuck onto a carrier film (black). The end of the adhesive strip is grasped with the upper clamp and pulled off at a 90° angle (angle peel test).

This experiment inevitably results in:

• at the beginning of the curve a superelevation
• an “oscillation curve” (force fluctuations of higher / lower adhesive forces) during the course of the test
• at the end of the test, a decrease in the adhesive strength until the final separation of the material

Since the adhesion/adhesive strength of the product is to be determined, the tear-off force at the beginning (point 1) and the force that decreases at the end of the test would result in a falsification of the forces. The Graphwork software therefore offers the option of "cutting off" areas at the beginning and end of the test. This means, for example, that the calculation of the adhesive strength only begins 10% after the start of the test and ends at 90% of the total test. These limits can be freely set.

The following results are already integrated into the Graphwork testing software:

• power of the upper tips
• power of the lower tips
• mean of the graph
• Difference between highest upper peak and lowest upper peak
• Difference between lowest lower peak and highest lower peak
• Difference between highest upper peak and lowest lower peak

In addition, other results (maximum force, etc.) can be activated or the measured values ​​can be related to, for example, an adhesive strip width (N/mm strip width).