Patent ID: 8752776
Filing Date: 2014-06-17
Classification: D21B,D21D

Abstract:
1. Method for the treatment of a composition comprising cellulose fibres into a composition comprising cellulose microfibers characterized in that the method comprises the steps of: a) Providing a composition comprising cellulose fibres; b) Admixing aqueous solvent to said composition comprising cellulose fibres to provide a pulp suspension comprising cellulose fibres; c) Feeding said pulp suspension comprising cellulose fibres into a refining step comprising a mechanical fibrillation process executed using a refining co-rotating twin screw; d) Refining said pulp suspension comprising cellulose fibres with at least the use of said refining twin screw, to provide a composition comprising cellulose microfibers; and wherein said obtained composition comprising relined cellulose fibres at the end of the refining step, can be formed into a range of papers, boards, and further wherein the composition comprising refined cellulose fibres has a Schopper-Riegler value (SR) upon leaving the twin-screw of step c), of at least 35 SR.