Corrugated board
Also: corrugated, corrugated fiberboard, corrugated board
A sandwich of paper liners bonded to a fluted medium, used to make shipping boxes. Single, double, or triple wall configurations are standard.
Corrugated board is the paper sandwich that makes boxes strong per gram. A single-wall board has one fluted medium between two liners. Double-wall has two flutes and three liners. Triple-wall has three flutes and four liners. The flute and liner weights and flute profiles (A, B, C, E, F, N) determine the finished box's compression, burst, and stacking strength.
Global corrugated production is about 175 million tonnes of containerboard annually, making it the largest paper category by volume.