Reasons for bending of wet water kraft paper tape

Baijin is a professional wet water kraft paper tape manufacturer. Its products are used for printing high-weight wet water kraft paper tapes, especially those with higher wood pulp content. When printing, the closer to the core, the degree of bending The larger it is, it will be difficult to restore the original shape after bending, resulting in failure to print. Why does the wet water kraft paper tape bend? Is there a way to solve this problem?

The root cause of the bending of wet water kraft paper tape:

The bending of wet water kraft paper tape is mainly because the temperature and humidity of the environment cause the paper fiber to absorb water or lose water. Since the transverse expansion rate of the fiber fiber is much greater than the longitudinal expansion rate of the fiber, the wet water kraft paper tape will occur when it absorbs water or loses water. Bending, in addition, there is a special feature that causes stress bending under the action of external stress.

solution

Close the paper close to the core and pick out the unusable paper. In high-weight wet water kraft paper tape, the paper in the core part of the cardboard cannot be used. At the same time, the thicker the cardboard or the smaller the diameter of the core, the more cardboard will be discarded at the core.

For the wet water kraft paper tape to adjust the humidity, and then put it in the air-conditioned room to adjust the temperature and keep it at room temperature. If the wet water kraft paper tape is bent due to wet water, then put the paper in a high humidity environment and pay attention to time control . If the wet water kraft paper tape is caused by water absorption, the paper can be placed in a high temperature and low humidity environment.

Finally, during the storage of the wet water kraft paper tape, we must pay attention to the temperature and humidity of the storage environment. In addition, it is generally necessary to adapt the environment before printing the wet water kraft paper tape, that is, put the cut paper in the same printing environment. Place for a period of time under temperature and humidity.