Customer: Sheets Unlimited
Production: corrugated board
Supplier: Valmet
Description: Valmet will supply a Valmet IQ Quality Control System for corrugators to Sheets Unlimited, among the largest independent corrugated box manufacturers in the Pacific Northwest, based in Washington, USA. The system will address key quality challenges, most notably moisture imbalance which is the root cause of warp, to improve board quality, production efficiency, and overall converting performance.
For independent sheet feeders like Sheets Unlimited who source roll stock from multiple mills, it is critical to ensure consistent quality and efficient production. Variations in paper grades, moisture levels, and fiber characteristics create unpredictable warp behavior that standard corrugator controls cannot fully manage, affecting converting performance, customer satisfaction, and material waste.
Details: The delivery includes combined paper temperature, moisture balance, total moisture and warp control, utilizing an interface to the existing state-of-the-art corrugator heating elements. It also incorporates Valmet’s proven moisture measurement technologies and automatic moisturizing solution.
The delivery consists of Valmet IQ Warp Measurement, Valmet IQ Moisturizer, Valmet IQ Multipoint Moisture, and Microwave moisture measurement, integrated with automatic closed-loop controls.
Valmet IQ Quality Control System for corrugator combines online moisture, temperature, and warp measurements. It is used to control all corrugated board types to reduce sheet warping, improve bonding, and thus maximize corrugated board box plant performance.
Start-up: The delivery is scheduled for the fourth quarter of 2026, with commissioning planned for January 2027.