Corrugated fiberboard is a paper-based material that consists of a fluted corrugated sheet and 1 or 2 flat liner boards. It is made on “flute lamination machines” or “corrugators” and is used in the manufacturing of shipping containers and corrugated boxes.

The linerboard and corrugated medium are created from kraft containerboard, a paperboard material that’s about 0.01 inches in thickness. Often, corrugated fiberboard is referred to as corrugated cardboard, though cardboard might imply a heavier board based on paper pulp.