Using high-performance paper machine forming fabrics is a core step to improve paper quality, optimize production efficiency and reduce production costs.
Below is a detailed analysis of its importance and the corresponding technical key points:
I. Decisive Role in Paper Quality
Fiber Distribution and Forming Uniformity
Forming fabrics support wet pulp and control the directional arrangement of fibers, directly affecting the formation, strength and smoothness of paper.
Dewatering Efficiency and Surface Performance
The air permeability and dewatering capacity of forming fabrics determine the amount of water removed in the forming section. Optimizing mesh density and surface structure (such as SSB forming fabrics) can accelerate water drainage, reduce the two-sided difference of paper sheets and improve surface strength.
II. Improvement of Production Efficiency
Operational Stability and Service Life
- Wear Resistance Optimization: Forming mesh woven with a blend of polyester monofilaments and nylon monofilaments can extend the service life to 60–90 days, reducing fabric consumption costs.
- Fatigue Resistance: Forming mesh with high fatigue strength (such as 8-harness two-and-a-half layer fabrics) are suitable for high-speed paper machines (speed > 1500 m/min), lowering the frequency of paper breaks.
Energy Consumption and Production Capacity Optimization
High-efficiency dewatering technology can reduce the energy consumption of the subsequent drying section.
III. Contribution to Cost Control
Reducing Raw Material and Maintenance Costs
- Material Innovation: Three-layer fabric structures, featuring high-density design, minimize fiber loss, improve retention rates and save filler costs.
- Simplified Maintenance: Wear-resistant coatings and easy-to-clean designs reduce downtime for maintenance.
Extending Equipment Service Life
High-quality forming mesh can reduce the wear of rolls in the forming section and decrease the frequency of equipment maintenance.
Matching Strategies for Selection and Application
Selecting Fabric Types According to Paper Grades
- Cultural Paper: 4-harness/5-harness single-layer fabrics (low cost, high formation uniformity).
- Packaging Board: 8-harness two-and-a-half layer fabrics (high tensile strength).
- Specialty Paper: Bonded double-layer weave fabrics (high fiber retention rate).
Coordination of Process Parameters
- Tension Control: Adjust fabric tension (3–6 kN/m) according to machine speed to avoid over-stretching.
- Cleaning Frequency: High-speed paper machines require shorter cleaning cycles to prevent mesh clogging.
