Rigid cardboard tubes, more colloquially referred to as paper Cylinder Tubes, find their uses in many areas of relevance as pertains to packaging. These are solid, cylindrical containers made through layers of kraft paper or paperboard wound together into one formidable, long-lasting structure. This paper will explain minute details about the manufacture of paper tubes, the raw materials used, step-by-step production, and why the tubes are that strong.

1. What is a paper tube?
Paper tubes are cylindrical constructions made from a few layers of kraft paper or paperboard joined by adhesives. They come in many sizes and thicknesses, with each suited to different uses: be it packaging, mailing, constructing, even in the textile industry. Custom rigid cardboard tubes, especially, are made to offer maximum protection and durability and are, therefore, very helpful in guarding fragile items against breakage during transport and storage.

2. Why Are Paper Tubes Strong?
The strength of paper tube roots in how they are made. Laying kraft paper or paperboard together by use of adhesives greatly gives strength and rigidity to the resultant structure. The followings are some key factors that make them so strong:

Material Quality: Production is made from quality kraft paper or paperboard that has been noted for its tensile strength and toughness.
Layering Technology: Paper will be winded into multiple layers, thereby dispersing tension over the surface of the tube while enhancing its overall strength. Gluing: Gluing between the layers is done to hold them together thus providing integrity to the tube so that these would not split up under pressure.
Curing: In this process, the adhesive will be set and further make the tube more structurally sound.

What is the raw material for making paper tubes? The common raw materials of the paper tubes are kraft paper and paperboard. Kraft is commonly used because of its characteristics, which make it strong and less tearing. Other materials related to manufacturing that may be used include adhesives and sometimes coatings or liners, depending on the application the tube is to be used for.