Production of sheets comprising fibrillated cellulose
AssigneeBillerudkorsnas AB
InventorsYunus Can Gorur, Per Larsson, Lars Wagberg
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Abstract
There is provided a method of producing a sheet comprising fibrillated cellulose, comprising the steps of: a) providing chemically modified cellulose fibres in which a chargeable moiety has been introduced and the C2-C3 bond has been broken in at least part of the D-glucose units, wherein the charge density measured according to SCAN-CM 65:02 is 150-1500 μeq/g; b) forming a fibre web by dewatering a slurry comprising the modified cellulose fibres; and c) adding a base to the fibre web so as to obtain the sheet comprising fibrillated cellulose.
Claims21
A method of producing a sheet comprising fibrillated cellulose, comprising the steps of:
- a) providing chemically modified cellulose fibres in which a chargeable moiety has been introduced and the C2-C3 bond has been broken in at least part of the D-glucose units, wherein the charge density measured according to SCAN-CM 65:02 is 150-1500 μeq/g;
- b) forming a fibre web by dewatering a slurry comprising the modified cellulose fibres;
- and
- c) adding a base to the fibre web so as to obtain the sheet comprising fibrillated cellulose.
A method of producing a fiber web, comprising the steps of:
- I. providing chemically modified cellulose fibres in which a chargeable moiety has been introduced and the C2-C3 bond has been broken in at least part of the D-glucose units, wherein the charge density measured according to SCAN-CM 65:02 is 150-1500 μeq/g;
- II. applying a slurry comprising the modified fibres to a forming wire of a paper machine;
- III. dewatering the slurry on the forming wire of the paper machine to form a fibre web;
- IV. further dewatering the fibre web in a press section of the paper machine;
- and
- V. drying the fibre web from the press section in a drying section of the paper machine to a density of 0.8-1.8 g/cm3 such as 1.0-1.6 g/cm3.
Dependencies are inferred from the claim text.