Kyoto University

Dic Corporation

Nippon Paper Industries Co., Ltd.

Kyoto Municipal Institute of Industrial Technology and Culture

Rohm Co., Ltd.

Nippon Telegraph and Telephone Corporation

Pioneer Corporation

Mitsubishi Chemical Corporation

Seiko Pmc Corporation

Fumiaki Nakatsubo

Hiroyuki Yano

Akihiro Sato

Kazuo Kitagawa

Takeshi Semba

Akihiro Ito

Masaya Nogi

Shinsuke Ifuku

Antonio Norio Nakagaito

Hiroaki Okumura

Hiromasa Kataoka

Yuko Igarashi

Kazuhiro Shintani

Daisuke Kabusaki

Tomoaki Yoshimura

Takahiro Uesaka

An object of the present invention is to provide a fiber-reinforced resin composition in which fibers with good dispersibility and a resin in which the fibers are easily dispersed have been suitably composited; and a method for producing the fiber-reinforced resin composition. Specifically, the object is to provide a fiber-reinforced resin composition that comprises chemically modified CNFs and a thermoplastic resin, and that has improved physical properties due to the suitable compositing of the fibers with the resin; and a method for producing the fiber-reinforced resin composition. The fiber-reinforced resin composition comprises chemically modified CNFs (A) and a thermoplastic resin (B), wherein the chemically modified CNFs and the thermoplastic resin satisfy the following conditions: (a) the ratio R of the solubility parameter (SP) of the chemically modified CNFs (A) to the solubility parameter (SP) of the thermoplastic resin (B), SP/SP, is in the range of 0.87 to 1.88; and (b) the chemically modified CNFs (A) have a degree of crystallinity of 42.7% or higher.

Fiber-reinforced resin composition comprising chemically modified cellulose nanofibers and thermoplastic resin

The present invention provides a method for producing a resin composition, which, by means of simple steps, can uniformly disperse microfibrillated plant fiber in a highly hydrophobic resin and can impart enhanced mechanical strength to a molding material obtained by molding the resin composition. The present invention further provides a resin composition having excellent heat resistance and low linear thermal expansion. The present invention relates to a method for producing a resin composition, the method including a step of mixing a thermoplastic resin or thermosetting resin (A), and modified plant fiber (b) or modified microfibrillated plant fiber (B), in the presence of an organic liquid (C), the modified plant fiber (b) or modified microfibrillated plant fiber (B) being obtained by modification with an alkyl or alkenyl succinic anhydride in a liquid capable of swelling microfibrillated plant fiber (B') or plant fiber (b).

Method for producing resin composition comprising modified microfibrillated plant fibers, and same resin composition

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

Disclosed is a highly transparent fiber-reinforced composite material including an assembly of cellulose fibers of 4 to 200 nm average fiber diameter impregnated with a matrix material so as to not only remedy the moisture absorbency attributed to cellulose fibers but also further improve transparency. There is provided a fiber-reinforced composite material including an assembly of cellulose fibers impregnated with a matrix material. In the fiber-reinforced composite material, hydroxyl groups of cellulose fibers are chemically modified through a reaction with one or more chemical modifiers selected from the group consisting of an acid, an alcohol, a halogenating reagent, an acid anhydride, and an isocyanate so that the ratio of a functional group introduced by the chemical modification is 5 to 40 percent by mole based on the hydroxyl groups of cellulose fibers before the chemical modification. The chemical modification of hydroxyl groups of cellulose fibers can reduce the hydrophilicity of cellulose fibers to thereby reduce the moisture absorbency of fiber-reinforced composite material. Further, the affinity between cellulose fibers and matrix material can be enhanced to thereby further improve transparency.

Fiber-reinforced composite material and process for producing the same

Growing community of inventors

Kyoto, Japan

Fumiaki Nakatsubo