Dic Corporation

Dainippon Ink and Chemicals, Incorporated

Jianye Jiang

Tetsuya Harada

Takayuki Miki

Takeshi Yamazaki

Hironobu Takizawa

The present invention provides a method for manufacturing a cellulose nanofiber, characterized by comprising the step of fibrillating cellulose in a polyester based resin, preferably in a polyester based resin having an ester group concentration of 6.0 mmol/g or more and a cellulose nanofiber produced by the manufacturing method concerned. In addition, the present invention provides a masterbatch composition containing the cellulose nanofibers and the polyester based resin. Furthermore, the present invention provides a resin composition containing the masterbatch composition and a diluent resin and a processed product thereof.

Method for fibrillating cellulose, cellulose nanofiber, masterbatch, and resin composition

The present invention offers sheet molding material for obtaining a thin fuel cell bipolar plate with excellent conductivity and thickness precision, production method thereof, and a fuel cell bipolar plate made by molding the sheet molding material. It relates to sheet molding material for a fuel cell bipolar plate and production method thereof, wherein the sheet molding material has carbon particle layer on at least one surface of the resin sheet, and the percentage of particles of carbon layer in the sheet molding material is 70% to 90% by weight.

Sheet molding material for fuel cell bipolar plate, method of producing same and bipolar plate or fuel cell

A fuel cell bipolar plate has a front surface and a rear surface opposite to each other, and flash and a receding portion. The flash is provided on the front surface at an outer peripheral portion of the bipolar plate and projects in a direction crossing the front surface. The receding portion is provided on the rear surface at an outer peripheral portion of the bipolar plate in a geometry capable of accommodating flash.

Fuel cell bipolar plate, and fuel cell

A fuel cell bipolar plate that while retaining its mechanical strength, has its electrical conductivity enhanced; a process for producing the same; and a fuel cell including the bipolar plate. There is provided a fuel cell bipolar plate comprising laminated molded item formed by a sheet-shaped molding material, wherein the sheet-shaped molding material contains a resin and a carbon material, and wherein the laminated molded item has a laminate structure of, arranged in sequence, surface layer C/inner layer B/central layer A/inner layer B'/surface layer C&#x2032;, and wherein each of the central layer A, inner layer B, inner layer B&#x2032;, surface layer C and surface layer C&#x2032; consists of a single layer or multilayer of the sheet-shaped molding material, and wherein when the carbon material content of central layer A is referred to as a, the carbon material content of inner layer B as b, the carbon material content of inner layer B&#x2032; as b&#x2032;, the carbon material content of surface layer C as c and the carbon material content of surface layer C&#x2032; as c&#x2032;, there are satisfied the relationships 55&#x2266;a&#x2266;85, 55&#x2266;c&#x2266;85, 55&#x2266;c&#x2032;&#x2266;85, 10&#x2266;a&#x2212;b&#x2266;30, 10&#x2266;c&#x2212;b&#x2266;30, 10&#x2266;a&#x2212;b&#x2032;&#x2266;30 and 10&#x2266;c&#x2032;&#x2212;b&#x2032;&#x2266;30 (the unit of each of a, b, b&#x2032;, c and c&#x2032; is % by volume).

Growing community of inventors

Takaishi, Japan

Jianye Jiang