Process for the production of nano-fibrillar cellulose suspensions
AssigneeFiberLean Technologies Limited
InventorsPatrick A.C. Gane, Joachim Schoelkopf, Daniel Gantenbein, Michel Schenker, Michael Pohl, Beat Kübler
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Abstract
The present invention relates to a process for the production of suspensions of nano-fibrillar cellulose by providing cellulose fibres and at least one filler and/or pigment; combining the cellulose fibres and the at least one filler and/or pigment; and fibrillating the cellulose fibres in the presence of at least one filler and/or pigment, as well as the suspensions of nano-fibrillar cellulose obtained by this process and their uses.
Claims41
1-24. (canceled)
A process for the production of a nano-fibrillar cellulose suspension comprising the steps of:
- (a) providing cellulose fibres, wherein all or part of the cellulose fibres may be obtained from a recycled pulp;
- (b) providing at least one filler and/or pigment;
- (c) combining the cellulose fibres and the at least one filler and/or pigment;
- and (d) fibrillating the cellulose fibres in an aqueous environment in the presence of the at least one filler and/or pigment in a homogenizer or an ultra-fine friction grinder until a nano-fibrillar cellulose suspension is formed, wherein in step (d) the weight ratio of fibres to the at least one filler and/or pigment on a dry weight basis is from 1:10 to 10:1.
Dependencies are inferred from the claim text.