What is Corrugated?

Corrugated fiberboard or "combined board" has two main tackles: the liner and the medium. Both are made of a superior kind of hefty paper called container board. Linerboard is the flat facing that adheres to the medium. The medium is the crimped, fluted paper in between the liners.


Single Face:
One medium is pasted to one flat sheet of linerboard.


Single Wall:
The medium is between two sheets of linerboard Also known as Double Face


Double Wall:
Threesheets of linerboard with two mediums in between.


Triple Wall:
Four sheets of linerboard with three mediums in between.



Architects have known for thousands of years that an arch with the proper curve is the strongest way to span a given space. The discoverers of corrugated fiberboard applied this same principle to paper when they put arches in the corrugated medium. These arches are known as flutes and when anchored to the linerboard with adhesive, they resist bending and pressure from all directions.

When a piece of united board is placed on its end, the arches form rigid columns, capable of supportive a great deal of weight. When pressure is applied to the side of the board, the space in between the flutes acts as a cushion to protect the container’s contents. The flutes also serve as an insulator, providing some product protection from sudden temperature changes. At the same time, the vertical linerboard provides even more strength and protects the flutes from damage.


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