Kyoto University

Nippon Paper Industries Co., Ltd.

Oji Holdings Corporation

Dic Corporation

Antonio Norio Nakagaito

Hiroyuki Yano

Akihiro Sato

Tadafumi Hashimoto

Akihiro Ito

Kazuo Kitagawa

Fumiaki Nakatsubo

Takeshi Semba

The present invention relates to anionically modified microfibrillated plant fibers used for obtaining a thermosetting resin molding material having excellent mechanical strength, a method for manufacturing the same, a molding material containing the anionically modified microfibrillated plant fibers and a thermosetting resin, and a method for manufacturing the same. Specifically, the present invention provides a molding material containing anionically modified microfibrillated plant fibers that are anionically modified in the presence of a base by a carboxylic acid represented by formula (I): X&#x2014;(CH)&#x2014;COOH (I), wherein X represents halogen and n is 1 or 2, and/or by a salt thereof, and a thermosetting resin, and the molding material contains the anionically modified microfibrillated plant fibers in an amount of 10 to 900 parts by weight per 100 parts by weight of the thermosetting resin.

Molding material and manufacturing method therefor

The present invention provides a novel cationized microfibrillated plant fiber and a method for manufacturing the same. A cationic microfibrillated plant fiber that is cationically modified with a quaternary-ammonium-group-containing compound, and that has an average diameter of 4 to 200 nm.

Cationic microfibrillated plant fibre and manufacturing method for same

The present invention relates to a molding material comprising an unsaturated polyester resin and microfibrillated plant fibers, the microfibrillated plant fibers comprising cellulose and hemicellulose, and having a specific surface area of 5 to 20 m/g; a method of producing the molding material; a molded article obtained by curing the molding material; and a method of producing an unsaturated polyester resin molded article comprising microfibrillated plant fibers.

Molding material containing unsaturated polyester resin and microfibrillated plant fiber

Although a microfibrillated cellulose has been conventionally added to a resin molded article for the purpose of improving the properties of resin such as strength, it is only possible to achieve the same level of strength as that of the resin itself. The object is to provide a resin molded article of greater strength. A molded article can be produced by blending resin with a microfibrillated cellulose having a type-II crystalline structure produced by treating a microfibrillated cellulose with an alkali solution. The molded article can be largely increased in tensile strength or flexural strength, tensile strain at break or flexural strain at break, and fracture toughness (work-of-fracture) compared to a molded article produced with resin containing a conventional microfibrillated cellulose.

Microfibrillated cellulose having cellulose type-II crystalline structure, and molded article containing the microfibrillated cellulose

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Uji, Japan

Antonio Norio Nakagaito