Asahi Kasei Kabushiki Kaisha

Yoko Fujimoto

Hirofumi Ono

Kazufumi Kawahara

Naoaki Yamasaki

Yamato Saito

Masayuki Nakatani

Hiroko Kawaji

Hirofumi Uchimura

Hirotaka Asai

An embodiment of the present disclosure provides fine cellulose fibers that satisfy, in measurement using an automatic fiber shape analyzer, all of (i) the length weighted average fiber length of fibers having a fiber length of at least 100 μm is 110-500 μm, (ii) the average fiber diameter is at most 42.5 μm, (iii) the fine fiber area ratio is at most 90%, (iv) the number frequency of fibers having a fiber length of 20-56 μm is at most 97% among fibers having a fiber length of less than 100 μm, (v) the number frequency of fibers having a fiber length of at least 411 μm is at most 54% among fibers having a fiber length of at least 100 μm, and (vi) the average fiber diameter is 20-150 nm in terms of specific surface area.

Fine cellulose fibers and production method therefor, nonwoven fabric, and fiber-reinforced resin and production method therefor

A resin composite film comprising a cellulose microfiber sheet and a resin, the resin composite film satisfying the following: (1) in a modulus mapping obtained by an examination of a cross-section with an AFM along the thickness direction, the fibers constituting the cellulose microfiber sheet have an average fiber diameter and a maximum fiber diameter, both calculated through image analysis, of 0.01-2.0 &#x3bc;m and 15 &#x3bc;m or smaller, respectively; and (2) at least one surface of the resin composite film has an overcoat resin layer having an average thickness, determined from the modulus mapping, of 0.3-100 &#x3bc;m.

Resin composite film including cellulose microfiber layer

Growing community of inventors

Tokyo, Japan

Yoko Fujimoto