This 3-point flexure test is performed to determine the buckling resistance of corrugated board to DIN 54608.
The test is used for advanced characterization of multi-wall corrugated products.
Performing the determination is simple and requires only relatively small specimen sizes.
The value depends on various basic parameters:
- SCT of the output paper
- Flute geometry
- Quality of the board adhesion
- Development of material flaws, such as plastic deformation during the manufacturing/molding processes, development of vacuum lines, etc.