Patent ID: 6214163
Filing Date: 2001-04-10
Classification: D21C,D21D,D21H

Abstract:
A process for producing a super microfibrillated cellulose, comprising passing a slurry of a previously beaten pulp through a rubbing part of a rubbing apparatus having two or more grinders each composed of abrasive grains having a grain size of No. 16 to 120 to microfibrillate the pulp and thereby to obtain microfibrillated cellulose, and further super microfibrillating the obtained microfibrillated cellulose with a high-pressure homogenizer to obtain super microfibrillated cellulose having an arithmetic average fiber length of 0.05 to 0.1 mm, a water retention value of at least 350%, a rate of the number of fibers not longer than 0.25 mm of at least 95% based on the total number of the fibers as calculated by adding up, and an axial ratio of the fibers of at least 50.