Mini-Encyclopedia of Papermaking Wet-End
Part Three: Equipment & Unit Operations
Rushing the Sheet
Papermakers use the word "rushing" to describe the situation in which the forming fabric is moving slower than the jet of stock. On many paper machines a minor amount of rush, say 1-3% relative to the fabric velocity, can improve formation uniformity. Rushing also tends to give fibers a greater alignment in the z-direction than they would have otherwise. Excessive rushing of a sheet is expected to hurt product strength and reduce the uniformity of formation. The opposite of rushing is dragging.
Request from the webmaster: Our goals include brevity and accuracy. Hopefully we have succeeded with the first goal without sacrificing the second. Please let us know right away if you find an error or omission. Also, please indicate points that need a clearer description.
RETURN TO INDEX PAGE OF ENCYCLOPEDIA
This page is maintained by Martin hubbe, Associate Professor of Wood and Paper Science, NC State University, firstname.lastname@example.org .