METHOD FOR PRODUCING CELLULOSE PARTICLE

摘要

PROBLEM TO BE SOLVED: To produce cellulose particles having a small average particle diameter and low crystallinity of cellulose I type by suppressing coagulation of the cellulose particles with one another. Ž

SOLUTION: Disclosed is the method for producing the cellulose particles, in which a grinding aid selected from a higher alcohol, a higher fatty acid, a higher fatty acid salt, a higher fatty acid ester, and a polyether is added to a low crystallinity cellulose raw material represented by formula described below with the crystallinity of cellulose I type of 33% or less, and the mixture is processed with a grinder in a dry process. Provided are (1) the method for producing the cellulose particles wherein the ratio [(an average particle diameter of cellulose particles)/(an average particle diameter of the low crystallinity cellulose raw material)] is 0.7 or less, and (2) the method for producing the cellulose particles wherein the average particle diameter of the cellulose particles is 50 μm or less. The crystallinity of cellulose I type (%)=[(I22.6-I18.5)/I22.6]×100, wherein I22.6represents diffraction intensity of a lattice plane (002 plane), and I18.5represents diffraction intensity of an amorphous part. Ž

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