D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 17/70 (2006.01) D21H 21/52 (2006.01)
Patent
CA 2636454
The method serves for loading a pulp suspension S with a filler, more particularly with calcium carbonate (fibre loading). In accordance with the invention the loaded pulp suspension S' is divided into at least two fractions, a light fraction (1) and a heavy fraction (2), for which one advantageous embodiment uses hydrocyclones (13). The different fractions have different degrees of loading; in other words, the amount of precipitated fillers adhering to the fibres is different in each case. The possibility exists of recycling the fibres loaded to a lesser extent back into the loading operation, in order to achieve a further increase in the degree of loading of that fraction.
Le procédé selon l'invention sert à ajouter une charge et en particulier du carbonate de calcium à une suspension de fibres S (charge de fibres). Selon l'invention, la suspension de fibres S' chargée est divisée en au moins deux fractions, une fraction légère (1) et une fraction lourde (2), et dans ce but, on utilise dans un mode de réalisation avantageux des hydrocyclones (13). Les différentes fractions ont un degré de chargement différent, c'est-à-dire que la quantité des charges précipitées et adhérant aux fibres est à chaque fois différente. Il est possible de renvoyer les fibres moins fortement chargées dans l'opération de chargement pour encore augmenter le degré de chargement de cette fraction.
Doelle Klaus
Henssler Joachim
Sim & Mcburney
Voith Patent Gmbh
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