The inner layer is called the corrugated medium and the outer layers are the inside and outside liners. The liner board is manufactured with the same type of material, referred to as kraft paper, used to make the common brown paper grocery sack.
Corrugated cardboard is used mostly to manufacture cardboard boxes.
Old Corrugated Cardboard in Oregon Oregon generates about 441,000 tons of OCC per year. That is the equivalent of 285 pounds per capita. Most OCC comes from retail and commercial activities. The majority of this is generated at large quantity sources like shopping and distribution centers. Only a small portion of OCC comes from residential sources.