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Peel strength tests of bonded layers.
This test method allows the determination of peel strength between bonded joints: a sandwich of two layers of aluminum and polyethylene. The objective is to measure the average torque needed to peel the two material.The device consists of a drum assembly, flexible load straps mounted on the bottom of the support, a self-closing upper jaw to hold the sample and a drum jaw to keep the outer skin against the face of the drum.
During a test, the load straps pull into the drum assembly, forcing it to rotate and rise along the length of the aluminum panel. This movement strips the outer skin of the core structure. The peeling force is controlled by the load measurement system and provides a measure of the strength of the joint between the 2 faces of the sandwich.