HEAVY-DUTY CORRUGATED BOARD: LOAD-BEARING AND ROBUST

Heavy-duty corrugated board is a corrugated board quality made from particularly stable double- and triple-wall corrugated board grades.

Two corrugated webs and three plain paper webs make up the double-wall board. With double-wall corrugated board, different flute types can be combined. The two corrugated webs can be corrugated in different flute types. In general, a large flute (A) is combined with a medium flute. The large flute comes to the inside because of the better cushioning capacity, the medium flute (C) to the outside for protection against mechanical stress.

The double-wall corrugated board can be bonded with single-faced corrugated board to produce triple-wall corrugated board. Triple wall corrugated board consists of seven paper webs: Outer liner, flute, intermediate liner, flute, intermediate liner, flute, inner liner.

The flute types can be combined in triple-wall corrugated board depending on the machine configuration. As with double-wall corrugated board, the larger flute type (AA) is inside because of the better cushioning properties. The medium flute (C) is on the outside because of the better protection against mechanical stress.