PAPER MADE BY ADDING CATION MODIFIED CELLULOSE DERIVED CELLULOSE NANOFIBER AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of paper having improved interlaminar strength (internal bond strength), while maintaining high yield.SOLUTION: There is provided a manufacturing method of paper by adding a cellulose nanofiber obtained by defibrating cation modified cellulose to an inorganic particle containing calcium of a paper material containing calcium ion. Further there is provided a manufacturing method of paper, where B type viscosity in a water solution with concentration of cellulose nanofiber of 1% (w/v) (60 rpm and 20°C) is 500 to 2000 mPa s, cation substitution degree is 0.02 to 0.50 per a cation modified glucose unit, the fibrillation of the cellulose is conducted by a high-pressure homogenizer treatment and calcium ion concentration in the paper material is 10 to 3000 ppm.SELECTED DRAWING: None