Breaker Stack

The breaker stack is located in the dryer section of the paper machine. Not all paper machines have a breaker stack. It is usually located after the third or fourth section of the dryers. The purpose of the breaker stack is to provide some calendering action to improve the smoothness of the sheet. The loading of the breaker stacks should be carefully monitored from the front to the back. Uneven loading can cause caliper, thickness, issues. The amount of loading capacity is dependent on the roll cover material. There should be specifications for a particular roll cover. Operators should be aware of the roll covers and be careful not to overload the stack. Overloading can lead to the destruction of the roll cover which can be catastrophic. It could lead to losing dryer felts and ropes, essentially a wreck. The stacks should automatically unload during a break to protect the stack. However, if a wad of paper comes through it could damage the rolls even when the stack is unloaded.