The Fujikura Cable Works Limited

Takayoshi Usuki

Kazuo Isawa

Masatsugu Maejima

Yukio Endo

Kohichi Saruwatari

Hideo Nagasaka

Kichizo Ito

Shin Kubota

Seizo Murayama

Takao Tuboi

A process of treating an anodic oxide film wherein a base material of a valve metal is anodized to form the anodic oxide film thereon, which is then impregnated with a polymerizable organic metal compound and thereafter subjected to polymerization of the compound, whereby the micropores of the anodic oxide film are filled and sealed with the polymerized organometallic compound. According to this process, there is provided a base material having an anodic oxide film impregnated with polymerized organometallic compound which is excellent in heat resistance, heat radiance, and electrical insulation, and hence the base material is useful for the printed wiring board, electrically-insulative heat sink, heat-resistant insulated wire and the like.

Process of treating a nodic oxide film, printed wiring board and process

A heat-resistant electrically insulated wire has a composite coating layer of a mixture of an inorganic fine powder and an inorganic polymer on a conductor and the composite coating layer has a resinous overcoat layer thereon. The composite coating layer has not artificially been fired, but is adapted to be converted into a ceramic layer when exposed to elevated temperatures during use.

Heat-resistant electrically insulated wires and a method for preparing

Organic or inorganic particulate solid substances are coated with a polymeric material by dispersing the particulate solids, the surfaces of which have been treated so as to be compatible with the polymer coating, in a solution containing the polymer dissolved in a water-immiscible solvent, slowly introducing into the dispersion an aqueous solution of a hydrophilic protective colloid, thus producing an emulsifying liquid medium, and removing therefrom the solvent, to finally obtain polymer coated solid particles. The polymer-coated powder thus obtained is useful for application to various substrates by fluidized bed coating, electrostatic spraying, or electrophoretic deposition, followed by sintering to form films.

Process of preparing polymer-coated powder particles

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Tokyo, Japan

Takayoshi Usuki