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Home March 14, 2010

Surface Prep
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The Pressure of Winding Rolls

Published Friday, April 28, 2006

Web Lines Too much pressure inside a roll means more wound roll problems: Adhesive layers ooze, nonwoven and other crush-sensitive products don’t bounce back, photographic coatings fog, and tacky films block. Add core impressions, starring, spoking, crushed cores, and cores stuck on shafts. Worst of all, more yielding and permanent deformation increases, causing bagginess or loose edges. Too little pressure inside a roll has its own negative side effects, including sagging rolls, cinching, telescoping, and scratching. Potentially worse than internal roll pressure that’s too high or low is to have both occurring in one roll at the same ...

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