Acid type carboxymethyl cellulose nanofibers and method of manufacturing the same

A dispersion with a viscosity of no excessively high when it is, to provide an acid-type carboxymethyl cellulose nanofibers and a manufacturing method thereof was introduced carboxymethyl groups to desalination to acid form. A carboxymethylation degree of substitution per glucose unit is 0.01 to 0.50, B type viscosity at a concentration 0.95 to 1.05 wt.% Water dispersion, under conditions of 60 rpm, 20 ° C. and the 1000 mPa · s or more, and 6 rpm, an acid type is 7000 mPa · s or higher at 20 ° C. conditions carboxymethylated cellulose nanofibers, and fibrillation step of fibrillating carboxymethyl cellulose, was used a cation exchange resin method for producing an acid-type carboxymethyl cellulose nanofibers having a desalting step of desalting by cation exchange reaction, the. .BACKGROUND