Paper Machine Forming Section Paper Break
The paper machine forming part is due to its high moisture content and low wet strength, which can result in breakage. Besides the problem of raw material and paper machine structure, it is also related to many factors of production process.
1. The reason for breakage may be caused by one or more reasons, which should be considered:
A. The wet strength of paper pages is too low
B. The water is too high when leaving the couch roller
C. There are fragments or bundles of fiber in the slurry
D. Plasma mass
E. Rotten pulp
F. Drop water
G. The quality of the slurry changes
H. The tension/stress change of the paper width
I. Changes in wet chemistry
J. Changes in temperature or pressure
K. There is a problem with the slurry from the headbox
L. Crisscrossing to quantitative inequality
M. The felt is not in good condition
N. Control of the Headbox
O. The state of the forming wire
2. The stripping point of the paper at the couch roller is changed
Check speed and motor load
Check the longitudinal quantification difference
3. The fracture head caused by high water in the couch roller, for the following reasons:
A. The freeness of the slurry will go through low to slow the filtration water
B. The slurry temperature is too low
C. the vacuum degree of the couch roller is too low
D. The press felt is too wet
E. sizing changes
F. Concentration of concentrated pulp
G. The wet strength of paper pages is too low
H. Broken paper fiber dissociation is not good
4. Reasons for quantitative change
A. Change of total pressure head
B. Changes in the temperature of the pulp
C. Quantitative control cannot play its due role
D. thick/thin slurry system
