What is Corrugated Cardboard? Types and Uses of Packaging

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The invention and application of corrugated paper date back to more than 100 years ago. The corrugated cardboard is of low costs, light-weighted but provides great strength at the same time. Moreover, its printability is excellent. What’s better, corrugated cardboard is mostly made from recycled pulp. As a result, it has been widely used in response to environmental protection in recent years.

Corrugated paper is made by laminating and attaching two paper materials, “liner” and “corrugated medium.”The composition of corrugated cardboard

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Due to the unique structure of corrugated paper, it has great strength to protect products. Meanwhile, it is light to carry and to transport. Nowadays, it is one of the most important packaging materials used in various industries for transportation and packaging materials.

Different types of corrugated cardboard

According to the different structures, there are three types of corrugated boards.

Single face corrugated cardboard Single face

The single face cardboard has only two layers. One corrugated medium is glued to one flat sheet of linerboard, and the flutes are exposed. Single face corrugated board is mostly used as inner packaging to protect the individual product from damage.
For example, it is used as the inner packaging for light bulbs.


Single wall corrugated cardboardSingle wall

The corrugated medium is glued between two outer liners. Also known as “double face”. It is the most common material for corrugated cartons and displays that provide stronger protection than single face corrugated cardboard.


Double wall corrugated cardboard

Double wall

Double wall board has two layers of corrugated fluting and three liners. It is often used for packaging large goods as well as cushioning to prevent the impact.

 

Flute Profiles                                          

Corrugated board can be created with several different flutes.

A-flute

【A flute】

Around 5mm. A flute delivers greater vertical compression strength and cushioning. It is suitable for packaging fragile items, such as fruits and glass.


 

B-flute

【B flute】

Around 3mm. It has flat pressure resistance and high strength, and it is suitable for packaging products that are resistant to backlog items, such as beverages, food cans, etc.


 

C-flute

【C flute】

Around 4mm. Most corrugated boxes in the United States fall into this category.


 

E-flute

【E flute】

Around 1.5mm. E flute structure provides an excellent printing surface. it is commonly used for consumer goods boxes, trays and countertop displays.


 

The uses of Corrugated Cardboard                 

In addition to being used as the outer packaging widely, corrugated cardboard is often used for displays. Displays made of corrugated board have the advantages of low costs and lightweight. Moreover, one of the characteristics of corrugated cardboard is that it can be assembled from small parts and can be disassembled into flat parts. As a result, corrugated cardboard displays can be shipped in flat, which can save client’s freight cost significantly. On the other hand, it also has a large advertising space, which allows to present the products in a perfect way and helps to draw every customer’s eye. Many large retail stores, such as Walmart, Walgreens, Costco, Target, etc., use the corrugated cardboard display as an important approach to POP displays in stores.