抄録
Recent decrease in basis weight of containerboard raises some quality problems, one of which is decrease in ring crush compressive strength in spite of adding enough dry strength additives. As a result, this can lead to an error in calculating box compressive strength using Kellicutt’s equation. In this paper, short-span test, which is widely recognized as the superior compression test to ring crush test, is reviewed from the analytical point of view as follows.
FEM simulation showed that ring crush compressive strength decreases with lower thickness due to buckling of the specimen, and that when thickness is extremely low, significant strength loss is caused by the buckling mode change.
Correlation between box and containerboard compressive strength suggested that short-span compressive strength could estimate the box compressive strength with more accuracy.
