Cardboard Warpage - Reverse

The paperboard is uneven and it is warped toward one side of the double-sided tissue.

the reason

Double-sided paper is too wet

Use different types of facial paper

Insufficient heat on double sided machine

Double sided paper is too high in humidity, causing distortion or bending in the direction of double sided paper or hot plate

Measures to increase the wrap angle on the double-sided paper preheater, or reduce the operating speed of the wagon wire to increase the temperature on the hot plate of the double-sided machine, reduce the amount of glue on the double-faced machine with different properties, and ensure that all the platen rollers work properly. Ensure that the hot plate temperature is at a maximum Reduce the operating speed of the device Reduce the wrap angle of the single-sided paper preheater Reduce or remove the wrap angle of the preheater on single-sided cardboard
(at the end of the bridge)
Increase the wrap angle of the preheater on the outer layer paper
(Double-sided cardboard)
Make sure that the adhesion is good. Reduce the amount of glue on the double-sided machine. Use a segmented sprayer on a single layer of paper. If possible, reduce the running speed. If possible, increase the temperature of the hot plate to increase the amount of glue on the single-sided machine and reduce the double-sided machine. The amount of sizing on the flyover increases the number of single-sided webs on the flyover to thousands of dry double-sided rolls and moist single-sided rolls