| abstract |
[PROBLEMS] To improve the dispersibility, liquid stability, and film-forming property of a fiber in a rubber component, and to obtain a rubber composition excellent in fracture characteristics with high productivity when blending fibers with rubber. A method for producing a product, a rubber composition, a vulcanized rubber and a tire obtained thereby are provided. A method for producing a rubber composition containing cellulose fibers and a rubber component. In a raw material dispersion containing cellulose fibers and a rubber component, a defibrating step in which the cellulose fibers are defibrated into cellulose nanofibers, and a rubber comprising the cellulose nanofibers and the rubber component obtained by the defibrating step A solidification step of adding an acid to the fiber dispersion to solidify the rubber-fiber dispersion. [Selection figure] None |