Toray Industries, Inc.

Tokai National Higher Education and Research System

Kyowa Industrial Co., Ltd.

Aisin Seiki Kabushiki Kaisha

National University Corporation Tokai National Higher Education and Research System

Daisuke Shimamoto

Yukitane Kimoto

Yuji Hotta

Koji Shiraki

Atsuhiko Yamanaka

Mariko Terada

Hotta Yuji

A method for measuring a fiber orientation degree includes: irradiating a sample formed of a composite material containing discontinuous carbon fibers with an X-ray to acquire an X-ray diffraction image; calculating an angle (2&#x3b8;)of a peak originating from a crystal face of graphite; calculating a correction coefficient &#x3b4; of a thickness of the sample; calculating an upper limit (2&#x3b8;)of the peak of the crystal face of graphite; calculating a diffraction sensitivity I(&#x3d5;) of the peak originating from the crystal face of graphite by correcting an integrating range with the correction coefficient &#x3b4; and integrating the X-ray diffraction image with respect to a diffraction angle (2&#x3b8;); and calculating a fiber orientation degree Sd(&#x3b2;) by the method of Hermans from the diffraction sensitivity I(&#x3d5;).

Method for measuring fiber orientation degree, fiber orientation degree measurement apparatus, and control computer program for fiber orientation degree measurement apparatus

A method for producing a preparation for fiber length measurement includes: a preliminary dispersion process of adding fibers and a dispersion medium with a viscosity of 500 Pa&#xb7;s to 10,000 Pa&#xb7;s to a sealable container so as to give a concentration of the fibers of 0.1% by mass or less and shaking the container to prepare a preliminary dispersion liquid; a dispensing process of dispensing part of the preliminary dispersion liquid to another sealable container; a dilution process of adding the dispersion medium to the dispensed preliminary dispersion liquid so as to give a concentration of the fibers of 0.005% by mass or less and shaking the container to prepare a dispersion liquid for measuring fiber length; and a casting process of spreading part of the dispersion liquid for measuring fiber length onto a base having light transparency.

Method for producing preparation for fiber length measurement, method for preparing dispersion liquid for fiber length measurement, method for measuring fiber length, preparation for fiber length measurement, fiber length measurement apparatus, and control computer program for fiber length measurement apparatus

Growing community of inventors

Aichi, Japan

Daisuke Shimamoto