peel strength test measures the force required to separate an adhesive tape or laminated material from a surface. A tensile testing machine or peel strength tester pulls the bonded sample at a controlled speed and records the force required for separation. Results are generally expressed in N/25 mm or N/mm, depending on the test method.
Difference Between 90° and 180° Peel Tests
90° Peel Test: The adhesive tape is peeled away from the bonded surface at a 90-degree angle. It is useful when the specified test method requires this geometry.
180° Peel Test: The tape is folded back and pulled parallel to the bonded surface at 180 degrees. This method is commonly used to evaluate adhesive performance in tapes and flexible laminates.
The appropriate test depends on the material, adhesive type, and applicable standard, such as ASTM D3330 for pressure-sensitive adhesive tapes.
Presto Stantest Pvt. Ltd. provides material testing instruments to help manufacturers evaluate adhesive performance and maintain product quality.
