The cardboard core tube, commonly used in the papermaking industry, serves a crucial purpose in handling and transporting rolled materials such as paper, textiles, and films. 

Description:

The cardboard core tube typically takes the form of a cylindrical structure, manufactured from multiple layers of specially processed and bonded paper or cardboard. It features open ends to facilitate easy insertion and removal of rolled materials.

Function:

- Providing Support: The primary function of the cardboard core tube is to provide structural support for rolled materials like paper and textiles, ensuring they maintain their shape and integrity during transport.
- Protecting Materials: It safeguards rolled materials from damage and helps maintain their rolled state, preventing them from loosening or deforming.
- Facilitating Handling and Storage: The cardboard core tube offers a convenient means to roll and transport large volumes of materials, while also facilitating storage and differentiation of various types of materials.

In summary, the cardboard core tube plays a vital role in the papermaking industry by supporting and protecting rolled materials, facilitating their transport and storage.