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Corrugated medium strength assessments in different flute structures, TAPPI Journal April 2026

ABSTRACT: Recent advancements in our ability to evaluate papers and our understanding of the mechanics of box failure have brought a renewed focus on measuring the performance of corrugated medium and an associated evolution of paper measurement approaches. This study evaluates the load curves, Hardness (where the fluted structure’s loading shifts away from an elastic response), and Concora medium crush test (CMT) values for a range of corrugated mediums in different common flute geometries. The shape of the load curve is a function of the geometry of the fluting profile and the relative stiffness of the paper, with smaller flutes and heavier papers reaching both the Hardness value and the ultimate load at lower deformation. Nonetheless, while the specific dynamics during the loading process vary, Hardness and CMT values correlate linearly between flute structures, even when testing specimens after different equilibration periods post-fluting. These correlations confirm the applicability of the standard A-flute CMT test to a broad range of papers and potential combined board flute structures, supporting quality assurance processes for medium production and optimization in corrugated board manufacturing.

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The effect of boxplant operations on corrugated board edge crush test, TAPPI JOURNAL, April 1994, Vol. 77(4) (1249KB)

The effect of boxplant operations on corrugated board edge crush test, TAPPI JOURNAL, April 1994, Vol. 77(4) (1249KB)

Standards and efficiencies for corrugated work centers, TAPPI JOURNAL, April 1994, Vol. 77(4) (1691KB)

Standards and efficiencies for corrugated work centers, TAPPI JOURNAL, April 1994, Vol. 77(4) (1691KB)

Visy's coolaroo mill serves corrugated needs in australia, TAPPI JOURNAL, November 1996, Vol. 79(11)

Visy's coolaroo mill serves corrugated needs in australia, TAPPI JOURNAL, November 1996, Vol. 79(11)

Dispersion of waxes during the recycling of old corrugated containers, TAPPI JOURNAL, December 1999, Vol. 82(12)

Dispersion of waxes during the recycling of old corrugated containers, TAPPI JOURNAL, December 1999, Vol. 82(12)

Presentation of a dry black liquor gasification process with direct causticization, TAPPI Journal March 2006

Presentation of a dry black liquor gasification process with direct causticization, TAPPI Journal March 2006