Case Study
Ultra-High Speed Tissue Line — 5.6m Width at 2,000 m/min
Luohe Yinge Special Paper Co., Ltd. — China
China
Valmet / Voith Hybrid
1,800 – 2,000 m/min
6 weeks from audit to stable operation
Project Snapshot
Country
China
Paper Type
12.5 – 16 g/m² Premium Tissue Paper
Machine Brand
Valmet / Voith Hybrid — 5,600 mm
Machine Speed
1,800 – 2,000 m/min
Project Duration
6 weeks from audit to stable operation
Products Used
Customer Background
One of China's premier tissue producers, operating an advanced 5.6m-wide tissue machine designed for speeds up to 2,000 m/min, producing premium lightweight tissue (12.5–16 g/m²). This is one of the widest tissue machines in Asia.
The Challenge
During sustained high-speed operation above 1,800 m/min, the existing forming fabric exhibited progressive wire marking and accelerated surface wear. The extremely short forming window (approximately 300 ms) meant that any dewatering non-uniformity would immediately manifest in the sheet. A forming fabric capable of withstanding extreme dynamic loads without sacrificing sheet quality was urgently needed.
The Solution
PAPTEX deployed a custom 3CSSB triple-layer SSB forming fabric (sheet side FSI 159, top layer 10-shaft satin weave). The dewatering curve was re-engineered with stepped foil blade angles (0.5°→1.0°→1.5°→2.0°) to distribute dewatering forces progressively across the forming zone. Finer weft yarns on the sheet side eliminated wire marking while maintaining drainage capacity.
Root Cause Analysis
The existing fabric's dewatering curve was overly aggressive in the first 10–15% of the forming zone, causing premature sheet sealing. Non-uniform localized dewatering imprinted wire marks into the sheet surface before the web was fully consolidated.
Implementation Timeline
1
Site Audit
Week 1On-site audit, used fabric forensics, dewatering curve evaluation
2
Fabric Engineering
Weeks 2–3Custom SSB structure, FSI and weft diameter optimization
3
Installation & Commissioning
Weeks 4–5Installation and forming section parameter recalibration
4
Stabilization
Week 6Real-time monitoring and fine-tuning
Results — Verified KPIs
Wire marking eliminated at all speeds up to 2,000 m/min. Fabric service life extended from 55 to 78 days (+42%). Sheet formation index improved by 8 points. Machine uptime increased 3.2%. The mill has now standardized on PAPTEX SSB forming fabrics across all its tissue machines.
| KPI Metric | Before | After | Improvement |
|---|---|---|---|
| Uptime Gain | +3.2% | — | |
| Fabric Life Extension | +42% | — | |
| Forming Index Improvement | +8 pts | — |
Return on Investment
Fabric life extended 42%. Machine uptime increased 3.2%. Investment recovered within 2 fabric cycles.
“Deploying a premium SSB triple-layer forming fabric on a 5.6m-wide giant tissue machine running at 2,000 m/min”
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