Sekisui Kagaku Kogyo Kabushiki Kaisha

Sekisui Fine Chemical Co., Ltd.

Kazuhiko Kanki

Minoru Kohara

Kunikazu Yamada

Kazuo Saiuchi

Toshinori Takagi

Masahiro Hotta

Shinsaku Nakata

Seiichirou Honda

Toshiharu Matsumiya

Hiroyoshi Hata

Kazuo Sakamoto

Hisayuki Matsuda

Seiya Hosokawa

Yukio Ohtsuka

Yutaka Shibata

Shinzo Yamada

A conductive fine sphere with a K-value and a recovery factor in a predetermined range is provided. Suppose a load value (kgf) is F, a compression displacement (mm) is S, and a radius (mm) is R at 10% compression deformation of this spacer, a K-value defined as the following equation is in the range of 250 kgf/mm.sup.2 to 700 kgf/mm.sup.2 at 20.degree. C., and a recovery factor after the compression deformation is in the range of 30% to 80% at 20.degree. C., and ##EQU1##

Fine sphere, a spherical spacer for a liquid crystal display element and

A coated color particle with extremely low susceptibility to decoloring is provided. The coated color particle comprises a colored core particle and a coating layer formed on the surface of the core particle, wherein the coating layer is formed by treatment of the core particle with an agent selected from the group consisting of silane compounds, silyl isocyanates, and organic titanium compounds.

Coated particle

A particulate spacer for use in a liquid crystal display cell, electrochromic display device, or the like is provided. The particulate spacer comprises a core particle and a functional layer formed on the surface of the core particle.

Particulate spacers and liquid crystal display cells containing these

Resin composition suitable for use in medical devices

A magnetic recording medium comprising a non-magnetic substrate such as on polyethylene terephthalate film, and deposited on the surface of the substrate by a ionized cluster beam deposition method, at least one ferromagnetic material selected from the group consisting of cobalt, cobalt-containing alloys, mixtures of cobalt with other elements, and chromium dioxide; and a process for production thereof. The magnetic recording medium is characterized by having superior magnetic properties, especially superior coercive force, residual magnetic flux density and squareness ratio, and high mechanical strength.

Magnetic recording medium

A magnetic recording medium comprising a non-magnetic substrate such as polyethylene terephthalate film, and deposited on the surface of the substrate by an ionized cluster beam deposition method, at least one ferro-magnetic material selected from the group consisting of cobalt, cobalt-containing alloys, mixtures of cobalt with other elements, and chromium dioxide; and a process for production thereof. The magnetic recording medium is characterized by having superior magnetic properties, especially superior coercive force, residual magnetic flux density and squareness ratio, and high mechanical strength.

Process for production of magnetic recording medium

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Uji, Japan

Kazuhiko Kanki