Case Study
Wide Fine Paper Line — Full Machine Clothing Synergy at 1,350 m/min
Zhongye Paper Yinhe Co., Ltd. — China
China
Valmet
1,300 – 1,350 m/min
8 weeks for full PMC solution deployment
Project Snapshot
Country
China
Paper Type
60 – 80 g/m² Premium Writing & Printing Paper
Machine Brand
Valmet — 5,280 mm
Machine Speed
1,300 – 1,350 m/min
Project Duration
8 weeks for full PMC solution deployment
Products Used
—
Customer Background
Operates one of China's premier fine paper lines — a 5.28m Valmet Fourdrinier with D-Former, producing premium writing and printing grades at speeds up to 1,350 m/min. Annual output exceeds 250,000 tons of high-quality cultural paper.
The Challenge
Fabric-related downtime caused by two persistent issues: formation non-uniformity on the Fourdrinier section leading to basis weight variation, and premature dryer fabric stretching causing tracking deviations. Using products from different suppliers created compatibility gaps — wet-end and dry-end fabrics lacked coordinated optimization, resulting in moisture profile mismatch at the critical wet-to-dry interface.
The Solution
Full-line PMC synergy solution: PAPTEX 3CSSB forming fabric paired with BGW flat yarn dryer fabric, precisely calibrated to the forming section's outgoing moisture profile. Single-supplier holistic optimization from wet end to dry end, with forming fabric FSI and dryer fabric permeability engineered as an integrated system for seamless sheet transfer and drying.
Root Cause Analysis
Single-supplier fragmentation: forming fabric and dryer fabric were optimized independently by different vendors, resulting in moisture profile mismatch at the wet-end/dry-end interface. Without a coordinated approach, each fabric performed adequately alone but sub-optimally as a system.
Implementation Timeline
1
Comprehensive Audit
Weeks 1–2Full-line wet-to-dry audit, moisture profile mapping, used fabric analysis
2
Solution Design
Weeks 3–4Simultaneous forming + drying solution design, FSI and permeability calibration
3
Installation & Commissioning
Weeks 5–7Synchronized forming and dryer fabric installation, parameter alignment
4
Stabilization
Week 8Performance monitoring and final optimization
Results — Verified KPIs
Cross-machine moisture variation reduced by 35%. Dryer fabric tracking issues completely eliminated (8→0 per year). Machine efficiency improved 4.7%. The mill consolidated PMC supply to a single vendor, reducing procurement complexity and spare parts inventory.
| KPI Metric | Before | After | Improvement |
|---|---|---|---|
| Tracking Issues | 8→0/yr | — | |
| Machine Efficiency | +4.7% | — | |
| Moisture Variation | −35% | — |
Return on Investment
Efficiency improved 4.7%. Single-vendor consolidation reduced procurement costs. ROI achieved within 3 months.
“Delivering a complete paper machine clothing solution for a premier 5.28m-wide, 1,350 m/min fine paper line. From clean wet-end formation to stable flat yarn dryer fabric operation”
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