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How Cardboard Postal Tubes are Made

1 Comment    |        |    May 3, 2023    |    Reading time 3 minutes
How cardboard postal tubes are manufactured

Cardboard postal tubes are awesome packaging material! They're perfect for storing and transporting documents, posters, and other cylindrical objects. Plus, they're eco-friendly and a great alternative to plastic packaging. In this blog post, we're going to explore the amazing manufacturing process of cardboard postal tubes.

Choosing the Best Materials

The first step in making cardboard postal tubes is choosing the right materials. It's important to select high-quality paperboard to create tubes that are strong and durable. The paperboard sheets are then cut into the right size and shape based on the desired tube's diameter and length.

Manufacturing cardboard tubes from reels of recycled paper fibers

There are several types of paper board that can be used in the manufacture of cardboard tubes, including chipboard, kraft paperboard, and recycled paperboard. The choice of paper board depends on the specific requirements of the tube, such as its strength and durability, as well as the desired eco-friendliness of the finished product.

Rolling and Gluing

Once the paperboard sheets are cut, they're coated with adhesive glue and then rolled onto a mandrel. The mandrel is a cylindrical object that the paperboard is wrapped around. The adhesive glue holds the layers of paperboard together, creating a sturdy and durable tube.

inspecting quality of custom printed cardboard tubes

There are several types of glue used in the manufacture of cardboard tubes, including PVA glue, epoxy glue, and hot melt glue. The choice of glue depends on the specific requirements of the tube, such as its strength, durability, and intended use.

It's difficult to say which type of glue is the most eco-friendly in terms of recyclability, as it depends on the specific type of glue and the recycling process used. However, PVA glue is a water-based glue that is generally considered to be less harmful to the environment than other types of glue, such as epoxy and hot melt glue. Additionally, PVA glue can be easily cleaned up with water, making it easier to recycle paper products that have been glued together using PVA glue.

Cutting and Finishing

After the paperboard is wrapped around the mandrel, the tube is cut to the desired length. The ends of the tube are then closed using a variety of finishing techniques, like crimping or gluing. Finally, the tubes are trimmed to make sure they're all the same length and shape.

Quality Control

Before the tubes are ready for use, they go through quality control. Each tube is inspected to make sure it meets the required standards and specifications. The strength, durability, and overall quality of the tube are tested to make sure it's tough enough to handle transportation and storage.

Quality control - factory worker using a set or vernier calipers to check diameter of cardboard tube during manufacture

Alongside standard visual inspections, there are several types of quality control testing that can be performed to test the strength of postal tubes, includes compression testing, drop testing, and vibration testing. Those tests are designed to simulate the conditions that the tube may experience during transportation and storage to ensure that the tube can withstand these conditions without damage.

Conclusion

That was a lot of work! Making cardboard postal tubes is a complex process that takes a lot of precision and attention to detail. But the results are totally worth it! Cardboard postal tubes are still a super popular choice for packing and transporting cylindrical objects. And because they're eco-friendly, they're the perfect choice for businesses looking to reduce their environmental impact.

Looking for some high-quality cardboard postal tubes? Look no further than The Packaging Club! We work directly with UK-based suppliers and manufacturers to get you the best prices. Our cardboard tubes are eco-friendly and perfect for storing your documents, posters, and other cylindrical objects and they come with free end caps.

This article was written by...

Nathan Calvert

Nathan is Head of Digital at The Packaging Club. He has worked in the packaging sector for over 15 years across food, consumer electronics, FMCG ecommerce and more, both directly in-house or as a freelance consultant.

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