MANUFACTURING METHOD OF FIBER MATERIAL AND MANUFACTURING METHOD OF COMPOSITE MATERIAL， FIBER MATERIAL AND COMPOSITE MATERIAL， AND SHEET FOR PLANT CULTIVATION

PROBLEM TO BE SOLVED: To provide a fiber material having excellent processability for converting a cellulose nanofiber into a composite and a manufacturing method thereof. SOLUTION: The manufacturing method of the fiber material includes a step of obtaining a CNF dispersion and a drying step. In the step of obtaining the CNF dispersion， a cellulose nanofiber aqueous dispersion containing a cellulose nanofiber dispersed in an aqueous solvent is mixed with a cationic surfactant， a polyhydric alcohol， and a polyvinyl alcohol. In the drying step， the aqueous solvent is removed from the CNF dispersion obtained in the step of obtaining the CNF dispersion to obtain a fiber material. The mass ratio of the cationic surfactant to the cellulose nanofiber in the CNF dispersion is 0.1-fold to 2.0-folds. The mass ratio of the polyhydric alcohol to the cellulose nanofiber in the CNF dispersion is 2-folds to 20-folds. The mass ratio of the polyvinyl alcohol to the cellulose nanofiber in the CNF dispersion is 0.02-fold to 10.0-folds. SELECTED DRAWING: Figure 1