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Shandong Ludao: Optimize Pulp Drainage Uniformity

Cross-directional pulp drainage uniformity is the core factor determining transverse thickness, density and shrinkage consistency of finished paper. On the paper machine forming table, inconsistent drainage speed across the web width causes partial wet web dehydration difference: fast-draining areas form dense, low-moisture paper layers, while slow-draining zones retain excessive free water. This unbalanced drainage leads to transverse thickness deviation, wavy edges, directional shrinkage difference and cross-machine strength inconsistency. During high-speed operation, uneven drainage triggers localized web collapse, intermittent paper breakage and unstable reel tightness. Most factories adjust forming box vacuum and shower flow to balance drainage, but these mechanical adjustments cannot solve micro-level fiber flocculation and pore structure differences, resulting in persistent drainage deviation. Shandong Ludao Energy Technology Co., Ltd. provides pulp drainage uniformity optimization solutions. By homogenizing micro-pore distribution of fiber flocs and balancing micro-scale water permeability across the web, we realize synchronous drainage speed in all transverse areas. The solution eliminates cross-machine thickness and density deviation, stabilizes web forming quality, reduces wavy edge defects, and achieves full-width consistent high-speed papermaking production.


 
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