What adhesive is used in corrugated boxes?

What Adhesive is Used in Corrugated Boxes?

Corrugated boxes have become an essential part of the packaging industry, used for shipping goods safely and securely. These boxes consist of three layers of paper, namely two outer flat layers and an inner fluted layer, forming a rigid structure. One crucial element that holds these layers together is the adhesive. But what exactly is the adhesive used in corrugated boxes, and why is it so important? In this article, we will explore the adhesive commonly used in corrugated boxes and its significance in maintaining the structural integrity of these packaging solutions.

Types of Adhesive Used:

1. Hot Melt Adhesive:

Hot melt adhesive, also known as hot glue, is a widely used adhesive in the packaging industry. This adhesive has excellent bonding properties and fast setting time. It is applied to the corrugated sheets in a molten state and quickly solidifies upon cooling. The advantage of using hot melt adhesive is its ability to provide instant adhesion, allowing for efficient production processes.

2. Water-based Adhesive:

Water-based adhesive, also referred to as liquid glue, is another commonly used adhesive in corrugated boxes. This adhesive is made by combining water with a polymer base, resulting in a sticky compound. Water-based adhesive is applied to the corrugated sheets using a roller or a brush before the layers are pressed together. This adhesive requires some drying time to achieve maximum bonding strength.

Importance of Adhesive in Corrugated Boxes:

1. Structural Integrity:

The adhesive used in corrugated boxes plays a vital role in maintaining the overall structural integrity of the packaging. Without a proper adhesive, the layers of the box may separate, compromising the protection provided to the contents inside. Adhesive ensures that the layers stay firmly bonded, enhancing the strength and durability of the box.

2. Stacking Strength:

Corrugated boxes are often stacked on top of each other during transportation and storage. The adhesive used in these boxes must have strong bonding properties to withstand the pressure exerted by the weight of the boxes above. A good adhesive ensures that the boxes stay securely stacked, preventing any accidental collapses or damages to the contents.

3. Seal Integrity:

Besides holding the layers together, adhesive is also used to seal the flaps of corrugated boxes. This prevents the contents from spilling out and protects them from external elements such as dust, moisture, or light. An adhesive with good sealing properties ensures that the boxes remain closed and intact until they reach their destination.

In conclusion, the adhesive used in corrugated boxes plays a crucial role in maintaining the structural integrity, stacking strength, and seal integrity of the packaging. Hot melt adhesive and water-based adhesive are the two commonly used types in the industry. Each type has its advantages and application methods, but both contribute significantly to the reliability of corrugated boxes.

If you have any further questions or need assistance with your packaging needs, please feel free to contact us. Our team of experts is always ready to help you find the perfect adhesive solution for your corrugated boxes.

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