10.2 - Cohesive versus adhesive mechanisms of failure in paper coatings - A modelling approach

Parvez Alam*, Martti Toivakka

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Continuum mechanics simulations using mesh free, analytical modelling methods were conducted to ascertain the levels of cohesive and adhesive failure in paper coatings. At ratios of yield strength (cohesive) to interface strength (adhesive) below ∼30, cohesive failure dominates. Increasing the mean interparticulate coordination number of the packing decreases failure in a paper coating, however at a certain level, there is little benefit from further increasing this physical characteristic. The residual elastic modulus decreases exponentially with a linear increase in the percentage of adhesively failed connections. This modulus is also found to be a function of the dimensions of the latex bridge. In terms of reducing adhesive failure, there is considerable benefit in decreasing the cohesive strength of latex whilst concurrently maintaining a sound adhesive strength. However, the ulterior consequence of doing this is the loss of coating stiffness.

Original languageEnglish
Title of host publication11th Advanced Coating Fundamentals Symposium Proceedings
Subtitle of host publicationThe Latest Advances in Coating Research and Development
Pages384-394
Number of pages11
Publication statusPublished - 1 Dec 2010
EventTAPPI 11th Advanced Coating Fundamentals Symposium: The Latest Advances in Coating Research and Development - Munich, Germany
Duration: 11 Oct 201013 Oct 2010

Publication series

Name11th Advanced Coating Fundamentals Symposium Proceedings: The Latest Advances in Coating Research and Development

Conference

ConferenceTAPPI 11th Advanced Coating Fundamentals Symposium: The Latest Advances in Coating Research and Development
Country/TerritoryGermany
CityMunich
Period11/10/1013/10/10

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