Single Wall, Double Wall, Great Wall – Corrugated Basics
Corrugated board consists of one or two outer plies, the flutes and, in multi-ply types of corrugated
board, of one or more intermediate plies. Cardboard, is classified based on the number of outer/intermediate plies and flutes.
Single face corrugated board is made from one play of fluted paper glued to one layer of kraft paper.
Figure 1. Single Face Corrugated Board.
Single wall boxes (double face) consists of one ply of fluted paper which is glued between two plies of kraft paper.
Figure 2. Single Wall Corrugated Board.
Double wall boxes are made from two plies of fluted paper glued between alternating layers of kraft paper.
Figure 3. Double Wall Corrugated Board.
Triple wall boxes are made from three plies of fluted paper glued between alternating layers of kraft paper.
Figure 4. Tri-wall Corrugated Board
If you guessed that more plies/walls equals stronger board, you’d be right! But… it works only if the flutes are running in the correct direction. If they’re not running vertically, the cardboard will collapse when loaded with weight from above.
Cartons are usually made from single wall and double wall cardboard. The strength offered by these configurations is sufficient for most industrial packaging, shipping and moving boxes.
Tri-wall boxes are often used for transport operations (think: Gaylord, D and E containers) and to replace wood in the crating of machinery. Triple wall cartons are also used in severe climates because it is more resistant to moisture.
If you’re unsure of what to use for your application, reach out to our experts. They will assess your product and shipping method to recommend a box that offers an appropriate amount of strength without going overboard on price.