Common Problems of Papermaking Felt
Felt is a kind of precious materials in papermaking process. It can dewater, slow down the vibration and adjust the paper web line.
Felt becomes Wider
It’s common that felt becomes wider after using for a certain time. It’s impertinent to tear it. Firstly halt and wait for the felt becomes dry. Then cut down the extra edges and use soldering iron to scald edge.
Felt knurling mainly occurs in Tissue paper machine. The main reasons are as follows.
1. The dosage of dispersant is too much;
2. The pull of vacuum is not enough, the impuroyies in slurry are too much, hydraulic pressure is not enough, supporting roll rubber aging;
3. Supporting roll doesn’t install in right plase;
4. The weight of fire wire is to large;
5. Fibers’ thickness is undeserved.
How to find the Felt Knurling Position
Remove paper pulp, slow down drive speed, continue opening the vaccum and spray pipe. Stop the spray pipe when felt is clean. After felt dry, the felt knurling position will become white.
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