How do you choose the right peel test method for an adhesive? If you need to test adhesives, tapes, labels, laminated materials, or flexible packaging structures, we recommend that you first consider the following factors: 1. Consider the actual application Understand how the material under test typically separates in real-world applications. If a flexible material is typically peeled at an angle close to 90 degrees during actual use, then a 90-degree peel test may be more representative. If the material is typically peeled at a 180-degree angle—with the material first folded parallel to itself—then a 180-degree peel test would be more representative. 2. Consult Applicable Standards Different adhesive products and applications may have specific standards that specify peel angles, specimen dimensions, peel rates, pretreatment conditions, and test procedures. If your customer’s specifications or industry standards require a specific test configuration, you should generally prioritize compliance with those requiremen

3. Consider the Flexibility of the Material Being Peeled This is an issue that is easily overlooked. Materials with different levels of flexibility may exhibit different characteristics during the peel process. In the 180° configuration, the material being peeled folds backward, so its thickness and bending stiffness will influence the test behavior. 4. Do Not Focus Solely on the Average Peel Force Peel testing is not merely about obtaining a single numerical value. It is also important to observe whether the curve remains stable during the test and whether there are any noticeable fluctuations....