PREDICTING THE PERFORMANCE OF CREPING ADHESIVES, PaperCon 2010 Conference

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The vast majority of modern tissue and towel production utilizes creping to impart a desired set of physical properties to the sheet. In the creping process a blade is run along the surface of the Yankee dryer, and the sheet impacts this blade at high speed causing a fracture failure in the coating at the interface between the sheet and the Yankee surface. The result is the production of the desired sheet crepe structure. The coating typically consists of adhesive, modifier, plasticizer, and release. Often the optimum combination of these components is determined by on-machine testing, which is time consuming and expensive. An alternative is to conduct a well-designed set of experiments using a laboratory scale apparatus that can simulate the creping process, a Crepe Simulator. The current work involves employing a statistically designed set of experiments that explore the possible range of coating package components and then using those results to create a performance map covering component content, Yankee surface temperature, and press roll loading. The investigation demonstrated the ability to map adhesive package performance over a range of package compositions and operating conditions, thus providing the capability of predicting adhesive performance.