Corrugated Packaging Materials (Part 1)

Corrugated Packaging Materials (Part 1)

Corrugated Packaging Materials (Part 1) 1200 1200 BloomPack BloomPack //

When it comes to packaging materials, there are numerous options available to you. Corrugated packaging is one of the most investigated options because of its construction, which provides a lightweight, strong, and versatile material. If you are unfamiliar with corrugated packaging, here is some basic information about it and when you might want to consider using it.

What exactly is corrugated material?

Corrugated cardboard, also known as corrugated fiberboard, is made from cellulose fibers that are either virgin or recycled from used corrugated cardboard or other materials. Corrugated cardboard is a structure made up of one or more corrugated elements called “medium” or “fluting” that are adhered to one or more flat elements called “liners” with adhesive applied to the flutes’ tops.

Corrugated board is classified according to the number of liners and mediums used: single face, single-wall, double-wall, triple-wall, and so on. The most common fluting types for board calipers are A, B, C, E, and F. These categories denote different flute sizes, based on height and frequency (distance between waves). Single walls are most found in A, B, and C-flutes, while BC is one of the most common double walls. The triple-wall, which is typically used for heavy-duty applications, varies depending on the manufacturer and location. Corrugated packaging comes in a variety of styles, shapes, and sizes depending on the application. There are international organizations that standardize construction.

The Various Liner Types

While many types of corrugated packaging appear nearly identical, they may be made from different materials, which can have a significant impact on their properties and, as a result, their performance as packaging. Liners, for example, come in a variety of styles. These are their names:

Kraft Liners

Kraft liners are made up of at least 70% to 80% virgin chemical pulp fiber. They are the highest material grade, are extremely stiff and strong, and have a finished surface. Many Kraft liners are made from soft wood pulp, though some are made from birch and other harder wood pulp. Kraft liners are classified into several subcategories based on their color:

Brown Kraft liners vary in natural brown color depending on the fiber, pulping process, and mill location. White Top Kraft liners are very strong and reasonably priced. White Mottled Kraft liners, also known as Oyster liners, are like White Top Kraft liners but have a mottled appearance. Bleached Kraft liners have a natural appearance but go through an additional bleaching stage. They are not as strong as unbleached liners. Birch Faced Kraft liners are made from the same materials as White Top Kraft liners, but the top ply is bleached. This reduces the overall environmental impact of the liner

Test Liners

Because of their higher recycled fiber content, test liners have a lower strength than Kraft liners. It is worth noting that brown test liners can be classified, though these classifications frequently differ depending on the country of operation.

Chip Liners

Chip liners are less common than Kraft and Brown Test liners. They are mostly made from uncontrolled recycled materials, so they are of lower quality. They do not provide the same level of performance as other types of liners.


Corrugated packaging is a lightweight, strong, and versatile material made from cellulose fibers. It is classified according to the number of liners and mediums used. In the following blog, we will go over Corrugated material and when it ought to be used.