Loose cores

1. Generally results from insufficient riding-roll pressure when winding is started.
2. Loose cores make the roll useless for converting because web tension cannot be controlled and the roll may move laterally and telescope.
3. Rolls may be salvaged by rewinding at low tension with minimal braking of the unwind roll.
— rewinding may need to be done twice to have good roll density and a sound enough roll for shipment.
4. Check and adjust nip loading torque and winding tension.