Nippon Paper Industries Co., Ltd.

Toppan Printing Co., Ltd.

Kaori Yamabe

Shinji Sato

Takeshi Fujii

Takeshi Nakatani

Koji Kimura

Kosuke Shimizu

Akiko Saiki

Fumiko Iwahori

A barrier paper includes a paper base material and a barrier layer containing cellulose fibers formed on the paper base material, in which an integrated value from 10.0 &#x3bc;m to 500.0 &#x3bc;m, obtained from a volume-based particle size distribution diagram when a dispersion containing the cellulose fibers is measured by laser diffraction, is 30% or more.

Barrier paper and paper cup

Provided is method for evaluating a cellulose nanofiber (CNF) dispersion, the method including: (1) a step of preparing 1.0 mass % of a CNF aqueous dispersion; (2) a step of adding a coloring material into the CNF aqueous solution and stirring with a vortex mixer; (3) a step of sandwiching a film of the coloring material-containing CNF aqueous dispersion between two glass plates such that said film has a thickness of 0.15 mm; (4) a step of observing, with a microscope, the film of the coloring material-containing CNF aqueous dispersion sandwiched between the two glass plates; (5) a step of sorting observed aggregates by size (diameter along major axis) thereof; and (6) a step of calculating a CNF dispersion index from the number of sorted aggregates and evaluating the dispersibility of the CNF aqueous dispersion.

Method for evaluating cellulose nanofiber dispersion, cellulose nanofiber aqueous dispersion, and cellulose nanofiber-containing food, cosmetic, and rubber composition

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Tokyo, Japan

Kaori Yamabe