Testing of paper packagingBox compression test and stacking test oncardboard boxes The box compression and stacking tests are described in Standard, ISO 12048. Both tests serve to determine the strength and the stacking capabilities of cardboard boxes. The complete carton is loaded until failure or until its nominal loading value is reached. In the box compression test, the cardboard carton is quickly loaded to the nominal loading value or until failure. In the stacking test, an agreed upon maximum load is held constant for a determined time, or until failure of the box.
Picture 31: Box compression test on a large cardboard box Picture 32: 4-point flexure test on cardboard Compression test on compound paper boxes The compression test on full and empty compound paper boxes serves to determine the strength of these packagings. The most varied box shapes can be simply and efficiently tested in a special horizontal testing machine. The specimen can be placed exactly and quickly into the testing unit with two guidance units. Flexure test on cardboard The 4-point flexure test on cardboard is described in Standard, ISO 5628. The 4-point flexure test is used to test single or multi- layered cardboard, heavy cardboard, heavy fiberboard or cardboard with fiber reinforcement, as well as testing of structural materials, e.g. honeycomb constructions. The supports integrated into the testing device are made especially for cardboard testing and do not have any influence on the measurements. Specimen from 200 to approx. 400 mm can be simply and exactly tested with this device.
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