Date of Award
Bachelor of Science
Paper Science and Engineering
The purpose of this study was to determine the effects of certain machine variables on shrinkage and also to determine a shrinkage and strength profile across the width of the sheet. Machine conditions varied were the draws and the amount of pressure on the presses. Cross direction shrinkage was measured by using felt marking pens to mark three sections across the web. Machine direction shrinkage was determined by using a cogged wheel to punch a series of small holes into the sheet which could then be measured at the reel. Press loading was shown to have no effect on cross direction shrinkage. Cross direction shrinkage was shown to increase as the draw increased but inability to maintain constant draws eliminated the possibility of attaching much significance to a stepwise analysis. Tensile and percent elongation were run and compared with the literature to substantiate the shrinkage results.
Hughes, John, "The Effects of Selected Pilot Paper Machine Variables on Web Shrinkage" (1971). Paper Engineering Senior Theses. 249.