The EcoCal calender consists of at least two hard rolls. The top roll, a heated chilled iron roll (Flexitherm), guarantees a uniform temperature profile. The bottom roll is a deflection compensation roll (Nipcorect) with which the cross profile can be corrected precisely and a consistent nip is produced.
The doctor operates with consistent blade contact force and completely eliminates deposits. A discharge device protects the roll and the downstream sensor system by reducing the static charge.
The EcoCal calender is used mostly for online calibration of the paper web. In pre-calendering of coat raw papers, the EcoCal calender achieves an improved quality after coating and end-calendering.