Kao Corporation

Takuya Morioka

Takuma Tsuboi

Junnosuke Saito

Tadanori Yoshimura

Yutaka Yoshida

Kyohei Yamato

Shunsuke Fukui

A powder of modified cellulose fibers has an average fiber length of 1 μm or more and 500 μm or less, wherein the modified cellulose fibers are made from anionically modified cellulose fibers introduced at an anionic group with a modifying group. A dispersion contains a powder of modified cellulose fibers as defined above and a medium, wherein the powder of modified cellulose fibers is dispersed in the medium. A resin composition contains a powder of modified cellulose fibers as defined above and a resin, wherein the powder of modified cellulose fibers and the resin are blended. A resin molded article is obtained by molding a resin composition as defined above. A powder of cellulose fibers having excellent dispersibility in a solvent, which can be obtained by an inexpensive process, and a method for producing the same can be provided.

Modified cellulose fiber powder

A method for producing shortened anionically modified cellulose fibers having an average fiber length of 1 μm or more and 500 μm or less, the method including cleaving sugar chains of anionically modified cellulose fibers by thermal decomposition under temperature conditions of 50° C. or higher and 230° C. or lower, wherein the average fiber length of the anionically modified cellulose fibers is 700 μm or more and 10000 μm or less. By the use of shortened anionically modified cellulose fibers or the like obtained by the method for production of the present invention, a dispersion containing fine cellulose fibers having a low viscosity and excellent handling property can be prepared while at a high concentration, so that the dispersion can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, packaging materials for household electric appliances, automobile parts, and materials for three-dimensional modeling.

Method for producing shortened anionically modified cellulose fibers

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Wakayama, Japan

Takuya Morioka