The paper manufacturing and converting sectors operate with fundamentally different roll paper size priorities, creating a critical need for precision slitting solutions. Here’s how these differences shape the industry:
1. Paper Mills: Standardization for Scale
Global Dominant of the Roll Paper Size:
- China: 1,940mm, 1,600mm, 1,220mm, 1,120mm, 940mm (GB/T standards).
- International Imports: 1,600mm, 1,575mm, 1,295mm (common for kraft/linerboard).
Why These Sizes? - Production Efficiency: Wide widths maximize output on high-speed paper machines (e.g., 3.5m+ machines).
- Transport Economics: Larger diameters (750–850mm) optimize shipping density.
- Standardization: Aligns with industrial norms like ISO 536 for raw material handling.
2. Converting/Printing Plants: Flexibility for Application
Common Compatible Widths:
- Narrow: 787mm (labels), 880mm (small boxes).
- Mid-width: 1,230mm (carton printing), 1,560mm (corrugated facing).
- Wide: 2,070mm (large-format packaging).
Drivers of Size Diversity: - Equipment Constraints: Rotary presses require ≤1,230mm for tension control; flexo machines adapt to 860–2,070mm.
- Order Customization: Short-run orders (e.g., luxury packaging) demand narrow rolls (≤500mm).
- Waste Reduction: Minimizing trim loss via precise width matching (tolerance: ±3mm).
3. Resolving the Disconnect: Slitting as the Critical Link
The gap between mill outputs (1,200–2,000mm) and converter needs (300–1,500mm) necessitates high-performance slitting:
- YYS Band Saw Solutions:
- Speed: Cut jumbo rolls (Ø1,500mm) at 30m/min.
- Precision: Achieve ≤Ra 3.2μm finish, eliminating secondary polishing.
- Adaptability: Handle diverse materials (tissue, kraft, laminates) with ±0.5mm width consistency.
Operational Impact:
- For Mills: Slitting enables small-batch customization without disrupting mass production.
- For Converters: Reduces warehousing costs by converting wide rolls into job-specific widths on demand.
Conclusion
While mills prioritize economies of scale through standardized wide rolls, converters thrive on application-specific narrow widths. YYS’s slitting technology bridges this divide—transforming industrial-scale output into tailored solutions with surgical precision, ensuring seamless supply chain synergy.