Caliper variation is one of the most critical metrics in papermaking. Roll profiles, TIR, stack loading and nip pressure at the calender help to control caliper variation of the final sheet. Excessive caliper variation can create challenges at the winder, leading to converting issues and customer rejects.

A brown papermill in the southeastern United States partnered with Precision Roll Grinders to employ precision roll grinds to increase roll life and improve production metrics such as cross-direction caliper variation. Upon switching to precision ground rolls, the mill found that their cross-direction caliper variation reduced by 16%.

Improved caliper variation reduces the amount of calender stack loading required to produce good paper. With reduced loading, a mill can produce paper with less fiber and better strength properties. The savings at this mill due to decreased fiber usage is valued at $15,000 annually.

Speak with Precision Roll Grinders to learn how tight tolerance roll grinding can deliver improved cross-direction caliper variation and associated savings for your mill.