Method for the manufacturing of microfibrillated cellulose

Details Method for the manufacturing of microfibrillated cellulose Method for the manufacturing of microfibrillated cellulose

D - Textiles, Paper

21

C

D21C 9/00 (2006.01) D21H 11/20 (2006.01)

Patent

CA 2641607

The present invention provides a method for treatment of chemical pulp for the manufacturing of microfibrillated cellulose comprising the following steps: a) providing a hemicellulose containing pulp, b) refining said pulp in at least one step and treating said pulp with one or more wood degrading enzymes at a relatively low enzyme dosage, and c) homogenizing said pulp thus providing s aid microfibrillated cellulose. According to a second aspect of the invention a microfibrillated cellulose obtainable by the method according to the first aspect is provided . According to a third aspect of the invention, use of said microfibrillated cellulose according to the second aspect in food products, paper products, composite materials, coatings or in rheology modifiers (e.g. drilling muds) is provided .

La présente invention concerne un procédé de traitement d'une pâte chimique pour la fabrication de cellulose microfibrillée comprenant les étapes suivantes : a) utiliser une pâte contenant de l'hémicellulose, b) raffiner ladite pâte en au moins une étape et traiter ladite pâte avec une ou plusieurs enzymes de dégradation du bois avec une dose relativement basse d'enzymes et c) homogénéiser ladite pâte, pour obtenir ainsi ladite cellulose microfibrillée. Selon un deuxième aspect, l'invention concerne une cellulose microfibrillée pouvant être obtenue par le procédé selon le premier aspect de l'invention. Selon un troisième aspect, l'invention concerne l'utilisation de ladite cellulose microfibrillée selon le deuxième aspect de l'invention dans des produits alimentaires, des produits papier, des matériaux composites, des revêtements ou des modificateurs de rhéologie (par exemple boues de forage).

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