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Corrugated production challenges such as scrap, bonding issues, excessive starch consumption, warp and reduced machine speed are often treated as separate problems. In reality, they are frequently connected. A change in paper properties can influence bonding, bonding affects moisture distribution, and moisture impacts drying performance, board flatness and production speed. As a result, solving one problem can sometimes create another elsewhere in the process.
Understanding where these compensating actions occur is often the first step towards reducing them.
Scrap and Waste
Scrap is one of the clearest signs that a corrugated plant is not converting raw materials into saleable board efficiently. While measured as a production KPI, scrap is often the result of variation elsewhere in the process, whether in bonding, moisture balance, paper quality or machine settings.
The impact can be significant. A plant producing 100 million m² annually would gain 1 million additional m² of saleable board by reducing scrap from 4% to 3%, without increasing paper consumption or installed capacity.
Speed loss
Many corrugators run below their technical capacity. The reason is often not the machine itself, but the risk of quality variation at higher speeds. When bonding, drying or board flatness become less predictable, slowing down becomes the safest response.
Lower speed protects quality, but it also reduces throughput while fixed production costs remain the same. In that sense, speed loss is often a symptom of process instability rather than a limitation of the corrugator itself.
Starch and steam
Starch consumption rises when bonding reliability decreases. Higher adhesive use increases the water load, steam demand and required drying time.
Efficient operations aim to maintain consistent bond quality without relying on unnecessary starch as a safety margin.
Moisture Variation
Moisture is one of the most influential variables in corrugated production, affecting bonding, drying performance, board flatness and machine speed. When moisture distribution becomes uneven, operators often compensate by adjusting starch dosage, heat or machine settings to maintain quality. Over time, moisture imbalances can contribute to warp, quality inconsistencies and reduced production efficiency. Read more about the causes of warp and how moisture distribution influences board flatness.
Additives that support more consistent moisture distribution and adhesive performance can help reduce variation and improve runnability across different paper grades.
New way of thinking
why stability matters
When production becomes less predictable, operators add safety margins in the form of higher adhesive use, more drying, lower machine speeds or other process adjustments. These actions help maintain quality, but they also increase cost per m².
The challenge is that the underlying issue is often not scrap, speed or starch consumption themselves. More often, it is instability in the process. Because corrugated production is influenced by paper properties, moisture distribution, machine settings and adhesive performance, small variations can affect multiple production indicators at the same time. Reducing cost therefore starts not by removing safety margins, but by understanding what makes them necessary in the first place.
If you’d like to explore the material science behind bonding stability, we have published an overview that explains how cellulose fibrils work inside corrugated board adhesives and influence moisture, viscosity and bond strength. Read the article here.