Title:
Wicking in Multi-Ply Paper Structures with Dissimilar Plies

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dc.contributor.advisor Ahrens, Frederick
dc.contributor.advisor Patterson, Timothy
dc.contributor.author McDonald, Patrick Edward en_US
dc.contributor.committeeMember Beckham, Haskell
dc.contributor.committeeMember Leisen, Johannes
dc.contributor.department Mechanical Engineering en_US
dc.date.accessioned 2007-03-27T18:21:58Z
dc.date.available 2007-03-27T18:21:58Z
dc.date.issued 2006-08-28 en_US
dc.description.abstract The wicking properties of multi-ply paper samples with dissimilar plies were investigated. These materials exhibit wicking performance in excess of either of their individual plies. Samples were produced from a ply of softwood pulp and a ply of hardwood pulp of equal caliper and basis weight. The softwood sample possessed a larger average pore size, a fact verified via porometry. Samples of a single ply were also produced for comparison. The samples were tested using both upward and downward gravimetric wicking tests. There was no saturation gradient observed, however there was a variation in the degree of bulk expansion during wicking. Capillary pressure and permeability for the various sample types were determined from the results of these tests and compared. It is shown that the wicking performance of the two ply sample is comparable to that of a theoretical material with the capillary pressure of the hardwood ply but the permeability of the softwood ply. Wicking in two-ply samples was also observed in an NMR apparatus. This was used to determine that the hardwood ply leads during wicking, and observe the rate of saturation as well as bulk expansion. A third type of experiment tracked the transport of dyed water from one ply to the other, establishing the direction of fluid transport during wicking to be from the softwood ply to the hardwood ply. The theory is proposed, based on these results, that wicking in this type of material consists of a smaller pored leading ply that draws water from a more permeable larger pored material that acts as a moving reservoir. en_US
dc.description.degree M.S. en_US
dc.format.extent 1859186 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/14082
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Nuclear magnetic resonance en_US
dc.subject Wicking en_US
dc.subject.lcsh Wood-pulp products en_US
dc.subject.lcsh Stock preparation (Papermaking) en_US
dc.title Wicking in Multi-Ply Paper Structures with Dissimilar Plies en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.corporatename George W. Woodruff School of Mechanical Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication c01ff908-c25f-439b-bf10-a074ed886bb7
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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