Daio Paper Corporation

Yu Ochiai

Ikko Matsusue

Junya Okawa

Fibrous cellulose highly capable of reinforcing resins, fibrous cellulose composite resins with high strength, and a method for preparing fibrous cellulose highly capable of reinforcing resins. The fibrous cellulose has an average fiber width of ≥0.1 μm, and has hydroxyl groups partially/fully substituted with carbamate groups at the substitution rate of ≥1.0 mmol/g, and has an average fiber length of >0.10 mm. This fibrous cellulose and a resin are contained in the composite resin. The method includes heat treating a cellulose raw material and urea or derivatives thereof to substitute part/all of the hydroxyl groups in the cellulose raw material with carbamate groups, and defibrating the raw material into an average fiber width of ≥0.1 μm, wherein the heat treating is performed so that the rate of carbamate-group-substitution is ≥1.0 mmol/g and an average fiber length of the material is >0.10 mm.

Fibrous cellulose, fibrous cellulose composite resin, and method for preparing fibrous cellulose

A fibrous cellulose composite resin being excellent in strength, a method for producing the same, and a reinforcing material for resins capable of significantly improving resin strength are provided. The fibrous cellulose composite resin includes fibrous cellulose containing microfiber cellulose, a resin, and an acid-modified resin, wherein the microfiber cellulose has an average fiber width of 0.1 μm or larger, an average fiber length of 0.02 to 2.0 mm, and a percentage of fibrillation of 1.0% or higher, and hydroxyl groups substituted with carbamate groups, and the carbamate groups are ionically bonded to acidic groups of the acid-modified resin.

Fibrous cellulose composite resin and production method therefor, and resin reinforcing material

A cellulose fiber composite recycled resin having excellent strength, and a method for producing the same. The cellulose fiber composite recycled resin contains a recycled resin and a mixture of fibrous cellulose, at least one of resin powders and resin pellets, and at least one substance selected from the group consisting of phthalic acid, phthalates, derivatives of phthalic acid, and derivatives of phthalates. For producing this composite resin, at least one of resin powders and resin pellets are added to a slurry of cellulose fibers to obtain a first mixture, a recycled resin is mixed into the first mixture to obtain a second mixture, and the second mixture is kneaded, wherein part or all of the cellulose fibers are fine fibers.

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Ehime, Japan

Yu Ochiai