14th fundamental research symposium advances pulp paper research

Mid Sweden University Library. Parameters such as stickies length and thickness, sheet thickness, or stickies orientation in the z-direction, are investigated. This is still a challenging task, since the resulting papers are orthotropic and most of the existing testing procedures and devices are not suitable for very thin sheet materials. Results showed that creep lifetime distribution is highly skewed with extreme scatters, but the distribution is still a class of Weibull distribution and can be handled without any problem. The mechanical retention was found to increase linearly with both web fibre grammage for each quartz fraction and with particle size. Please enter recipient e-mail address es. Examples of numerical solutions are presented and discussed. Similar Items Related Subjects: 5 Pulping. Filtration experiments with a bleached sulphite pulp yield results that agree satisfactorily with the calculations, confirming predicted formation times to within less than 10 percent. The refining impulse can be used in a beater for understanding and controlling the refining effects on fibres. Snapshot reveal qualitative difference between the networks formed by fibers of different lengths. The content of the Open Access version may differ from that of the licensed version. One remedy would be the enhancement of numerical simulation tools.

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Using this method, eighty two 82 commercial and laboratory-made samples were analyzed. The aim of this work was to understand the particle level swelling and pore structure of microfibrillated cellulose MFC. When this is combined with the good water drainage properties, which allows the high addition levels of strengthening agents as micro fibrillar cellulose MFC , one can make products with very big bulk and still have an adequate strength value. The purpose with the first trial was to validate that the geometric mean of the studied properties in MD and CD is constant and equal to the isotropic value. Providing a linkage between process conditions and the end use properties through the characterization of the network structure is the overarching goal of this investigation.
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Limited data suggests that the extent of recovery from z-directional wet compression is directly correlated with WRA values. We are still here for you online and by telephone, and our digital services and TIB document delivery are available as usual. However, this is not an easy task, first because the filtered cake is a non-homogeneous compressible porous media, second because the filtration flow is non-stationary, since the cake is continuously evolving in time.
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There has been much recent interest in the use of microfibrillated and nanofibrillated cellulose as additives to improve the mechanical properties of paper. Theory and experimental data relating to the possible effects of tension drying on the zero-span tensile strength of machine-made paper are presented. This paper describes techniques developed to enable the structure of paper to be seen in considerable detail in cross-section. Comment on the Classify Project.
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The experimental results showed that flocculation was more pronounced in the long-fibred pulps, but that the reduction in paper strength with increasing heterogeneity is greater in the short-fibred paper. The filtration of a fiber suspension has been studied experimentally. The goal of this study was to gain a greater understanding of the changes in the mechanical properties of spring wood fibres during the consolidation of the web. The current model associated with cellulose liberation from lignin and hemicellulose relies on the use of highly basic reagents resulting in significant alterations to cellulose native structure.
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The connections between mean compacting pressure during flow and the total pressure drop, between the exponents N, n and between the coefficients M, m, are discussed.
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