The paper used to make corrugated cardboard boxes can be classified into two categories: linerboard and medium.
- Linerboard: Linerboard is the flat, outer-facing paper used on the top and bottom of a corrugated cardboard box. It provides the smooth, printable surface of the box and helps protect the contents from moisture, dust, and damage. Linerboard can be further classified into two types: kraftliner and testliner. Kraftliner is made from virgin wood pulp and is known for its high strength and durability. Testliner is made from recycled fibers and is typically less strong than kraftliner but is more cost-effective.
- Medium: The medium is the fluted paper that provides the corrugated cardboard box with its strength and cushioning properties. The medium can also be further classified into different types based on the size and shape of the flutes. The most common flute profiles are A, B, C, E, and F flutes. A flute is the largest and provides the greatest cushioning and strength, while F flute is the smallest and is typically used for smaller, lighter items.
Overall, the choice of paper used for corrugated cardboard boxes depends on factors such as the intended use of the box, the required strength and durability, and the desired cost-effectiveness.
