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Title
On the deformation properties of high field fiber materials by undestructive methods
Authors
Veska Lasheva and Maria Karsheva
Received
September 16, 2008
Published
Volume 43 Issue 1-3 January-March
Keywords
chemi-mechanical pulp (CMP), deformation properties, slip modulus, stress, deformation
Abstract
High yield fibre material chemi-mechanical pulp (CMP), obtained after the treatment of poplar wood with sodium hydroxide solutions and green liquor, was studied at different degrees of grinding, as well as in composition with cellulose. The stress-deformation curves were derived and the effect of loading time on elastic deformation was shown. The time and rate of loading necessary to decrease the stress in the samples tested at constant deformation were studied. The slip modulus, characterizing the non-uniformity in cellulose and paper samples, was determined. The application of undestructive methods for the analysis of fibrous materials gives the possibility to predict their physico-mechanical properties and the behaviour of the paper under exploitation conditions.
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