How to Improve The Service Life of Paper Making Felt?

Factors That Cause Wear and Tear on Paper Making Felt

Paper making felt is an important and valuable dewatering consumable that must be configured in paper production. Replacing the vacuum box cover, insufficient needle tightness of the felt, light shaping, excessive vacuum, lack of lubricating water between the felt and vacuum box cover, improper selection of vacuum box cover material, high friction coefficient, and later use of the felt can all cause wear and tear on the felt.

In the operation of paper machines, the maintenance of the press felt plays an important role that cannot be ignored without losing the surface properties of the paper.

It is necessary to improve the press device, strengthen the cleaning of the paper making felt, and select high-performance new felt in order to ensure paper quality and extend the service life of the felt.

Regular Testing of Paper Making Felt

The adoption of detection device: In the later stage of use, the thickness of the paper making felt decreases to a critical point. Due to the thinness of the felt, continuing to use it will affect the dehydration efficiency and needs to be replaced in a timely manner.

It is expected that the appropriate time for the paper making felt to be removed from the machine requires regular inspection of the historical records of felt performance.

Improvement of Paper Making Felt Cleaning Technology

The sources of pollution caused by paper making felt include fibers, wet strong resins, sizing agents, clay, calcium carbonate, etc. After using the press felt for a period of time, as such fillers occupy the internal voids of the fabric structure, the performance of the fabric also decreases.

In addition, in paper making from waste paper, with the increase of secondary fiber recycling, various artificially synthesized organic substances such as pressure-sensitive adhesives, hot melt materials, coating adhesives, sizing agents, and ink residues often adhere to inorganic fillers, fine fibers, etc. and deposit on the paper making felt, shortening the service life of the press felt and affecting paper dehydration.

The common occurrence of pulp deposition causing clogging in paper and cardboard factories often leads to unplanned shutdowns.

Strengthening the washing of paper making felt and removing fine components in the slurry that clog the pores of the cloth can prolong its service life.

During the mid-term operation of the medium speed cultural paper machine press felt (usually 7-10 days), it is necessary to promptly perform normal chemical cleaning and high-pressure water spray cleaning on the felt; Wash every 7 days, 5 days, and 2 days in the middle stage, and gradually shorten the interval time in the later stage; It is also possible to fully utilize the condensed water discharged from the dryer and install a hot water tank in the felt running section for hot water washing. The temperature of the hot water is generally 60 ℃; In the later stage of paper making felt operation, chemical cleaning should be applied, and attention should be paid to edge cleaning to avoid embossing caused by adhesive pulp.

If you want to know more about the maintenance method of paper making felt, welcome to contact us.