Building a Defect Free Reel on the Paper Machine, 1997 Finishing and Converting Conference Proceedings

Robert K. Stevens, Jake Zwart & Stuart R. Loewen - LSZ PaperTech Inc <>

Good quality reel build at the paper machine is essential to produce defect free rolls of paper for the customer. More crepe wrinkles in reels are experienced today due to larger diameter reels, more calendering to achieve a smoother finish, fillers causing increased paper density, and recycled furnish causing a lower coefficient of friction. Reel density analysis and J-line testing are used to determine the quality of the parent reel. These tests identify the location of small crepe wrinkles in the paper. The Reel Density Monitor displays the density profile of the critical primary to secondary arm transfer, often showing a consistent density dip at the point of primary arm release. The wound in density profile is compared to the nip load between the reel and the reel drum, demonstrating the effect of the nip load on the density profile. Examples are given from two paper machines to describe how this was used to diagnose reel build problems and optimize the parameters that control reel build.