Structural Integrity in Linerboard

Vertical compression resistance, commonly abbreviated ECT (Edge Crush Test), determines how much stacking load a corrugated structure can bear before failure. Understanding the fiber orientation, flute profile, and moisture content of linerboard is essential to engineering packaging that survives real-world logistics.

Our lab runs every new linerboard formulation through standardized ECT and Mullen burst testing before it reaches production. This data directly informs the box designs we recommend for heavy, high-stack, or long-transit shipments.

The physics are unforgiving, but predictable. Engineered correctly, corrugated paperboard consistently outperforms buyer expectations on strength-to-weight ratio.