RUBBER-IMPROVING MATERIAL, RUBBER-IMPROVING MATERIAL DISPERSION FLUID, AND RUBBER COMPOSITION

摘要

The present invention provides a rubber-improving material exhibiting good dispersion properties in a dispersion liquid, and having excellent rubber-improving effects such as rubber strengthening properties. This invention pertains to: a rubber-improving material comprising a cellulose fiber, having at least 50% of cellulose fibers having a fiber length of no more than 450 nm, out of the total number of cellulose fibers; a rubber-improving material dispersion fluid containing said rubber-improving material and a dispersion medium; and a rubber composition containing said rubber-improving material and a rubber component.