Papers by Julieta Benitez
espanolLa produccion de papel a partir de fibras de plantas anuales o de residuos agroindustriale... more espanolLa produccion de papel a partir de fibras de plantas anuales o de residuos agroindustriales es una alternativa rentable para paises con escasos recursos madereros. Estas fibras pueden ser empleadas para obtener diferentes calidades de papel artesanal. El objetivo de este estudio fue evaluar la potencialidad de cinco tipos de fibras no convencionales de Colombia (limoncillo, canelo, bambu, papayo y fique) para la fabricacion de papel artesanal mediante la caracterizacion microscopica de estas fibras y la determinacion de las propiedades fisico-mecanicas y opticas del papel artesanal obtenido. Las propiedades papeleras resultaron en general, mas bajas que las propiedades de pulpas quimicas convencionales (similares a las de una pulpa quimimecanica de eucaliptos). La mejor forma de utilizar estas fibras en papeles artesanales es elaborar hojas de gramajes superiores a 100 g/m2 y utilizarlas sin blanquear, aprovechando su aspecto rustico y coloracion natural para la fabricacion d...
O Papel Revista Mensal De Tecnologia Em Celulose E Papel, 2014
The aim of this work was to verify the recyclability of three printing and writing papers, from t... more The aim of this work was to verify the recyclability of three printing and writing papers, from the characteristics of their fibers after two recycles. To do this, we examined the microscopic characteristics of recycled pulps and the physical properties of the sheets, trying to relate both characteristics.
Paper recyclability implies in the paper capacity to be recycled maintaining its properties to th... more Paper recyclability implies in the paper capacity to be recycled maintaining its properties to the maximum. Four commercial papers from Argentina and Brazil were studied, including three eucalyptus kraft (A, B, C) and one sugar cane bagasse soda-AQ (D), all with different bleaching processes. Their physical and chemical properties and a first laboratory recycling were evaluated. A refining of the pulp with a PFI mill, applying two energy levels at two different intensities -measured by number of revolutions and load -was accomplished to reach the same °SR (between 30 and 40, approximately). The refining energy and the yield were registered in each case. The properties of laboratory handsheets, and the aging to 24, 48, 72 and 144 hours were evaluated. The statistical analysis of the results indicates that the properties of the initial eucalyptus papers were similar, whereas they were generally inferior in the case of the bagasse paper. The bagasse and eucalyptus papers presented simi...
Recyclability is the ability of a material to reacquire the same properties it had originally. Th... more Recyclability is the ability of a material to reacquire the same properties it had originally. The aim of this work was to verify the recyclability of three printing and writing papers, from the characteristics of their fibers after two recycles. Three ECF bleached kraft eucalyptus bond commercial papers from Argentina and Brazil were studied (A, B, C). The papers were repulped and refined using different levels and intensities of energy (1st recycle). Laboratory sheets were produced, and they were repulped and refined again (2nd recycle). The microscopic characteristics of repulped papers were obtained by authomatic equipment based on image analysis. Differences found in the behavior of the different samples can be explained by fiber parameters. The fiber length was significantly different in the three papers (A> B> C) and globally decreased in the second recycle (about 6%). Sample A had the highest initial fiber length and length/width, but it largely decreased with refining...
Recyclability is the ability of a material to reacquire the same properties it had originally. Th... more Recyclability is the ability of a material to reacquire the same properties it had originally. The aim of this work was to verify the recyclability of three printing and writing papers, from the characteristics of their fibers after two recycles. Three ECF bleached kraft eucalyptus bond commercial papers from Argentina and Brazil were studied (A, B, C). The papers were repulped and refined using different levels and intensities of energy (1st recycle). Laboratory sheets were produced, and they were repulped and refined again (2nd recycle). The microscopic characteristics of repulped papers were obtained by authomatic equipment based on image analysis. Differences found in the behavior of the different samples can be explained by fiber parameters. The fiber length was significantly different in the three papers (A> B> C) and globally decreased in the second recycle (about 6%). Sample A had the highest initial fiber length and length/width, but it largely decreased with refining...
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Papers by Julieta Benitez