Common problems &Solutions of press felt

1. Shrinkage

The main reason for shrinkage of press felt is the unstable structure of the base cloth in the production.

Treatment method: loosen the stretch roll, let the pres felt run in a loose state.

2. Widening

The press felt may become wider after using, this is a normal phenomenon, do not tear by hand, stop the machine, wait for press felt to dry and cut off the excess part, and then iron the edge.

3. Press felt stained by pulp

New woolen cloth staining is generally because the rough surface of press felt, it might be better after you brush it with copper brush , if the press felt has been used for a period of time,That’s because the fiber is too long, burn it with blowtorch.

4. The right way to use press felt

Do not put too much strain when use it in the beginning, also the speed can not be too fast. Make the new felt work slowly for the first two to three hours and keep the test speed between 70-80. 24 hours later, push the speed up to 90-100 meters per minute, 36 hours later, push it to 100-130 meters, finally change the machine to full-speed operation. After a week of use,the cloth must be cleaned once, which is conducive to our product.

5. Embossing

It is a multifaceted problem, the following may cause embossing: too much dispersant, insufficient vacuum suction, too many impurities in the pulp, insufficient water pressure, incorrect installation of the rollers etc..

This requires good quality of paper machine.