Measuring out-of-plane shear properties of paperboard

Two experimental procedures were used to test the shear properties of three paperboards. First, a double-notch shear specimen was used. In this test, an in-plane tensile test specimen was utilized. To generate a shear test from the specimen, two notches were cut through the specimen, one from each side of the specimen. This test procedure is simple and easily can be used for production control. Second, a rigid-block shear test was used. In this test, the paperboards were glued with photo-mounting tissue between two steel blocks. The specimen was tested with displacement control in an MTS system. From both shear tests, maximum shear stresses were calculated and compared. It was shown that reproducible results were achieved by both methods.