Abstract: A method for producing shortened anionically modified cellulose fibers having an average fiber length of 1 ?m or more and 500 ?m 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 ?m or more and 10000 ?m 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.

Abstract: The present invention relates to an adhesive composition containing (a) modified cellulose fibers having a cellulose I crystal structure, an average fiber length of 1000 nm or less, and an average fiber diameter of 1 nm or more and 300 nm or less; and (b) a resin. According to the present invention, an adhesive composition having excellent mechanical strength such as shearing adhesive strength can be provided. The adhesive composition of the present invention described above can be utilized in structural adhesion of vehicle assembly products and the like.

Abstract: A fine cellulose fiber composite in which a modifying group is bound to a carboxy group of fine cellulose fibers, the fine cellulose fibers having a carboxy group content of 0.1 mmol/g or more, wherein the fine cellulose fiber composite has an average aspect ratio of 1 or more and 150 or less; and a resin composition containing the fine cellulose fiber composite and a resin. The resin composition containing a fine cellulose fiber composite of the present invention has excellent heat resistance, and the molded article of this resin composition has excellent mechanical strength, heat resistance, and dimensional stability. Accordingly, the present invention can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, wrapping materials for household electric appliance parts, and automobile parts.

Abstract: The present invention relates to a method for producing fine hydrophobically modified cellulose fibers wherein anionic group-containing anionically modified cellulose fibers are bound to a modifying group, the method including subjecting hydrophobically modified cellulose fibers having an average fiber length of 1 ?m or more and 1,000 ?m or less to a finely pulverizing treatment in an organic solvent. The fine hydrophobically modified cellulose fibers obtained by the method for production of the present invention can be suitably used in various resin manufactured articles for daily sundries, household electric appliance parts, wrapping materials for household electric appliance parts, and various industrial applications such as automobile parts.

Abstract: A method for producing shortened anionically modified cellulose fibers having an average fiber length of 1 ?m or more and 500 ?m 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 ?m or more and 10000 ?m 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.

Abstract: A fine cellulose fiber composite containing fine cellulose fibers and a polymer having an ethylene oxide/propylene oxide (EO/PO) copolymer moiety or a propylene oxide (PO) polymer moiety, the fine cellulose fibers being connected with the polymer via an amide bond. The fine cellulose fiber composite of the present invention has high dispersibility in the resin and can exhibit an effect of increasing strength, so that the fine cellulose fiber composite is suitably used as various fillers, and the like. Also, the resin composition of the present invention containing a dispersion of the fine cellulose fiber composite can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, wrapping materials for household electric appliance parts, and automobile parts.

Abstract: A fine cellulose fiber composite in which a modifying group is bound to a carboxy group of fine cellulose fibers, the fine cellulose fibers having a carboxy group content of 0.1 mmol/g or more, wherein the fine cellulose fiber composite has an average aspect ratio of 1 or more and 150 or less; and a resin composition containing the fine cellulose fiber composite and a resin. The resin composition containing a fine cellulose fiber composite of the present invention has excellent heat resistance, and the molded article of this resin composition has excellent mechanical strength, heat resistance, and dimensional stability. Accordingly, the present invention can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, wrapping materials for household electric appliance parts, and automobile parts.

Abstract: A fine cellulose fiber composite containing fine cellulose fibers having a carboxy group and an amine having an ethylene oxide/propylene oxide (EO/PO) copolymer moiety, the fine cellulose fibers being bound with the amine at the carboxy group to form a salt, wherein the fine cellulose fibers have a carboxy group content of 0.1 mmol/g or more, and wherein the molecular weight of the EO/PO copolymer moiety is from 700 to 10,000, and wherein a PO content ratio in the EO/PO copolymer moiety is from 1 to 70% by mol. The fine cellulose fiber composite of the present invention has high dispersibility in the resin and can exhibit an effect of increasing strength, so that the fine cellulose fiber composite is suitably as various fillers, and the like.

Abstract: A fine cellulose fiber composite containing fine cellulose fibers having a carboxy group and an amine having an ethylene oxide/propylene oxide (EO/PO) copolymer moiety, the fine cellulose fibers being bound with the amine at the carboxy group to form a salt, wherein the fine cellulose fibers have a carboxy group content of 0.1 mmol/g or more, and wherein the molecular weight of the EO/PO copolymer moiety is from 700 to 10,000, and wherein a PO content ratio in the EO/PO copolymer moiety is from 1 to 70% by mol. The fine cellulose fiber composite of the present invention has high dispersibility in the resin and can exhibit an effect of increasing strength, so that the fine cellulose fiber composite is suitably as various fillers, and the like.

Abstract: A fine cellulose fiber composite containing fine cellulose fibers and a polymer having an ethylene oxide/propylene oxide (EO/PO) copolymer moiety or a propylene oxide (PO) polymer moiety, the fine cellulose fibers being connected with the polymer via an amide bond. The fine cellulose fiber composite of the present invention has high dispersibility in the resin and can exhibit an effect of increasing strength, so that the fine cellulose fiber composite is suitably used as various fillers, and the like. Also, the resin composition of the present invention containing a dispersion of the fine cellulose fiber composite can be suitably used in various industrial applications such as daily sundries, household electric appliance parts, wrapping materials for household electric appliance parts, and automobile parts.

Abstract: A fine cellulose fiber composite containing fine cellulose fibers having a carboxy group and an amine having an ethylene oxide/propylene oxide (EO/PO) copolymer moiety, the fine cellulose fibers being bound with the amine at the carboxy group to form a salt, wherein the fine cellulose fibers have a carboxy group content of 0.1 mmol/g or more, and wherein the molecular weight of the EO/PO copolymer moiety is from 700 to 10,000, and wherein a PO content ratio in the EO/PO copolymer moiety is from 1 to 70% by mol. The fine cellulose fiber composite of the present invention has high dispersibility in the resin and can exhibit an effect of increasing strength, so that the fine cellulose fiber composite is suitably as various fillers, and the like.