Patent ID: 8647468
Filing Date: 2014-02-11
Classification: D21C,D21H

Abstract:
1. A process for treating cellulosic fibers said process comprising: pre-treating the fibers with an enzyme in a first enzymatic treatment wherein the enzyme during the first enzymatic treatment has an activity of 0.01-250 nkat/g, mechanically pre-treating the fibers in a first mechanical treatment at a consistency of between 15-40% by total weight, treating the fibers with an enzyme in a second enzymatic treatment wherein the enzyme during the second enzymatic treatment has an activity of 50-300 nkat/g, and wherein the activity of the enzyme during the second enzymatic treatment is higher than the activity of the enzyme during the first enzymatic treatment, and mechanically treating the fibers in a second mechanical treatment to form microfibrillated cellulose at a consistency of between 15-40% by total weight.