Patent ID: 8436165

Claim:
A process for producing a decrystallized cellulose from a raw material comprising at least 20% by weight, based on the weight of the raw material excluding water contained therein, of a cellulose having a cellulose I-type crystallinity of more than 33% as calculated from formula (1): Cellulose I -type Crystallinity (%)=[( I 22.6 −I 18.5 )/ I 22.6 ]×100 (1) wherein I 22.6 is a diffraction intensity of a lattice plane (002 plane) as measured at a diffraction angle 2θ of 22.6° in X-ray diffraction analysis; and I 18.5 is a diffraction intensity of an amorphous moiety as measured at a diffraction angle 2θ of 18.5° in X-ray diffraction analysis, said process comprising treating the raw material using a vibration mill with rods as grinding media to reduce the cellulose I-type crystallinity of the cellulose to 33% or less, wherein the raw material has a bulk density of from 100 to 500 kg/m 3 , wherein the rods each have an outer diameter of from 5 to 50 mm.