During the papermaking process, the press felt seems like just a consumable item on the paper machine, but its role goes far beyond simply “transporting”.
The press felt directly participates in the paper dewatering, press transfer, running support, and surface stability process. So it has a long term imparct on the paper machine efficiency, paper quality, and overall operating costs.
Press Felt Affects Papermaking Performance
 |
 |
Press Felt Influence Paper Dewatering
One of the core objectives of the pressing section is to improve dewatering efficiency under stable operating conditions.
If the structure of the press felt is unreasonable, or the pore state, water permeability, and resilience of the felt are unstable, it may cause problems such as insufficient dewatering, fluctuations in moisture content, and increased paper drying load.
So, a suitable press felt is not simply about pursuing higher dewater permeability, but to achieve a balance between dewatering capability, paper sheet support, and operational stability.
Press Felt Pressure Resistance
This performance determines the stability of the press felt under a high-load environment.
During the papermaking process, the felt is running under the combined effects of pressure, friction, moisture, and chemical environments for extended periods.
Under such high-load pressing conditions, the press felt supports the paper sheet as it operates between the pressure rollers.
If the support of the press felt is insufficient, it is easy to cause problems such as excessively rapid compaction, decreased rebound, and reduced water permeability, which in turn affect the paper sheet dewatering and operational stability.
Anti-Clogging Ability
During the paper machine operation, the fine fibers, fillers, adhesives, and contaminants can easily enter the press felt structure.
If the felt is not cleaned in a timely or thorough manner, once clogging worsens, the permeability and dewatering efficiency of the felt will be reduced. It will also increase the cleaning pressure and even affect the lifespan of the press felt.
Therefore, choosing the most suitable felt and the best manufacturer at the beginning can help you achieve twice the result with half the effort.
A good press felt solution is not just about providing a model number, but about understanding the on-site working conditions and matching a more suitable structure, performance, and service plan.
Press Felt Lifespan
The lifespan of a press felt typically depends on various factors such as the quality of the raw materials used, the design of the backing fabric, the needle-punching process, heat setting, operating pressure, paper machine speed, cleaning methods, and the production environment.
It’s important to note that good initial performance does not equal a longer lifespan.
During long-term operation, press felts are constantly subjected to mechanical compression, friction, and chemical environments, causing their performance to decline over time gradually.
Therefore, what truly determines the lifespan of a press felt is not only its performance during the initial operating phase but its ability to maintain structural stability and consistent performance over long-term use. This places higher demands on the manufacturer’s production capabilities.
How to Choose the Press Felt with the Best Performance
Excellent Manufacturing Capability Goes First
The performance of the felt ultimately depends on the combined control of multiple stages of the press felt manufacturing process. Including material selection, weaving, needle punching, setting, washing, singeing, and pre-pressing.
Choose the Best Manufacturing Support
Different paper mills have different paper types, mill speeds, pressing conditions, washing methods, and operational goals.
Therefore, Sun Hong firmly believes that a good paper press felt solution is not just about providing a product, but about understanding the on-site operating conditions and matching a more suitable structure, performance, and service plan.
Chinese (Simplified)
Arabic
Dutch
English
French
German
Italian
Portuguese
Russian
Spanish