Causes and solutions of paperboard warping

The reason for the warping of cardboard: corrugated cardboard is too dry, the shrinkage ratio of the face paper and corrugated cardboard is not the same, and it is generally warped in the direction of the face paper.

Solution:

1, the face paper warped, on the machine to the opposite direction grip

2, corrugated cardboard water is too low, cardboard is too dry, before use to corrugated cardboard water

3, the mounted cardboard is stacked positive and negative, and the number of each stack is less when receiving paper, and the second weight is heavy

4, face paper and corrugated cardboard with the same grain, face paper mixed corrugated cardboard grain cross mounted, pressing speed faster

5, choose high solid content of paper laminating machine Starch Glue, glue solid content is high, unit square on the glue amount is small.