National Institute for Materials Science

Fuji Chemical Company, Limited

Fuji Kagaku Corporation

Matsushita Electric Industrial Co., Ltd.

Kyocera Corporation

Satoshi Kawanaka

Fumio Uchida

Hiroshi Fudoji

Tsutomu Sawada

Seiichi Furumi

Yuji Tanikawa

Junpei Yamanaka

Akiko Toyotama

Yuji Nakano

Masahiro Okada

Shinichirou Takigawa

Yoshiyuki Kawasumi

Provided are: a sheet of colloidal crystals immobilized in resin exhibiting intense structural color, enabled to be observed easily from a squarely facing direction against a surface; and use thereof. The sheet of the present invention, assuming a direction perpendicular to part of a surface of a target area including partially the sheet surface is set as a specified axis, satisfies: (1) The target area includes plural inclined back-reflecting crystal-domains crystal domains having colloid particles immobilized in resin and including crystal lattice planes capable of Bragg-back reflecting at least some of components in a visible wavelength range of incident light having greater than 0 incident angle with the specified axis; and (2) By defining an azimuth angle around the specified axis, the inclined back-reflecting crystal-domains are so oriented that intensity of reflected light caused by Bragg back reflection varies depending on the azimuth angle of the incident light.

Sheet of colloidal crystals immobilized in resin, method of displaying structural color using same, method for detecting unevenness distribution or hardness distribution of subject using same, and structural color sheet

A sheet of colloidal crystals immobilized in resin exhibiting intense structural color and allowing easy observation thereof from squarely facing direction against the surface; and application thereof are provided. The sheet includes crystal domains comprising colloidal crystals immobilized in resin. The Bragg reflection intensity resulting from crystal domains according to back reflection spectrum measurement to the sheet surface satisfies the following conditions (1) and (2). (1) When elevation angle from the sheet surface is in a range of at least 60&#xb0; and less than 90&#xb0; and measurement is performed at a predetermined azimuth angle on the sheet surface, intensity is not 0 and (2) when elevation angle from the sheet surface is in the range of at least 60&#xb0; and less than 90&#xb0; and azimuth dependency on the sheet surface is measured, the intensity exhibits a maximum value at the predetermined azimuth angle.

An epoxy resin composition is provided which includes a polycrystalline structure comprised of a plurality of monocrystalline structures. The plurality of monocrystalline structures are respectively comprised of a plurality of silicon oxide colloidal particles regularly aligned in epoxy resin. The plurality of silicon oxide colloidal particles are not contacted with each other. The mean distance between the silicon oxide colloidal particles adjacent to each other is less than 330 nm. The mean particle size of the plurality of silicon oxide colloidal particles is less than 290 nm. The concentration of the plurality of silicon oxide colloidal particles is 10-50% by mass. A relative permittivity of 4 or more is ensured. A method for producing the epoxy resin composition is provided. Building materials, ornaments and optical materials, each using the epoxy resin composition, are also provided.

Epoxy resin composition, and method for producing the same

The present invention provides an acrylic resin composition containing a polycrystal of colloidal particles of silicon oxide in an acrylic resin that is formed by curing an acrylic monomer liquid at room temperature and/or an acrylic oligomer liquid at room temperature, wherein a mean distance between the colloidal particles in the polycrystal is 140 to 330 nm. The size of the single crystal that constitutes the polycrystal can be controlled by adjusting the content of silicon oxide and/or the additive amount of impurities. An architectural material, a fashion accessory, and an optical material are provided that are formed by using the acrylic resin composition.

Acrylic resin composition, method of manufacturing the same, and architectural material, fashion accessory, and optical material formed using the same

In a recording/reproducing apparatus using a hard disk drive (HDD), a connection confirmation/processing program (program for confirming connection with an external equipment and conducting processing required for that connection) which can be executed during starting time of the HDD is stored in a non-volatile memory (e.g., flash memory) of a microcomputer, and a recording/reproduction control program which cannot be executed until the HDD becomes accessible and is greatly affected by extension of the functions and modification of the specification is stored in the HDD.

Audio visual data recording/reproducing apparatus

Growing community of inventors

Osaka, Japan

Satoshi Kawanaka