A Comprehensive Guide to Wholesale Corrugated Boxes


Corrugated boxes and cardboard boxes are distinct, despite the fact that most people mistake them. This can cause the phrase to be misunderstood. Folding boxes and other goods are frequently made from cardboard, a sturdy paper material.

Cardboard frequently makes up the folding cartons that line grocery aisles. Think of a box of cereal or a cheese and mac container. This is not the kind of package you would anticipate making it through shipping. One of these will almost surely arrive in pieces if you mail one of them.

Contrarily, a corrugated box’s strength is crucial

Wholesale corrugated boxes are made comprised of a liner and a medium. These paper sheets are attached by a bond. They typically consist of three layers of fiberboard, but they could be much thicker.

The outer layer is referred to as the linerboard or simply the liner. The flat materials known as liners are often found on the outside of the board, however, they occasionally appear on the inside, as in the case of double or triple walls.

The medium is the flute, which is a central layer with waves. This internal component gives corrugated packing boxes their strength, which explains why they’re so well-liked for storage and transportation.

Which type of paper is used in corrugated?

The two most typical forms of paper used in corrugated boxes are test paper and kraft paper.  The box’s external liner is often made of kraft paper, while the internal liner is typically made of test paper.

Compared to test paper, kraft paper is more expensive but of higher quality.  Kraft paper is derived from softwood woods like pine, spruce, and fir and contains 70–80% virgin chemical pulp fiber. These include brown, white, speckled, completely bleached, and birch-faced, among other hues and textures.

Additionally, Kraft paper has a smoother texture, which makes printing on it simpler. Additionally, the contents are better protected because it is more water-resistant. Due to its improved resistance to rips and bursts, it is also more robust than test paper.

What Do Corrugated Flutes Do?

Corrugation is another name for the C-shaped curves on the flute that separate the two substrates. It is used to make the packaging’s walls stronger or more durable. They have the appearance of glued-on, wavy c-shaped lines. The fluting of the Brandt Box gives it strength and helps it withstand any harm.

The box’s stacking strength and wall thickness are also influenced by the flute size. A letter designating the size of the flute is used to identify it. They are measured in terms of thickness and flutes per linear foot.

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