Sekisui Kagaku Kogyo Kabushiki Kaisha

Tomoegawa Paper Co., Inc.

Shiro Nakano

Kazuo Tanaka

Shigeki Nakamura

Masaru Koike

Tosimasa Ikena

Yoshiro Naito

Masahiro Hotta

Akira Nishio

Kengo Kitahara

Tsugumichi Nakagawa

Norio Kanbe

An electric recording material comprising

Method for electric recording

Electric recording material

A method for performing electric discharge recording on the recording surface of an electric discharge recording material using a discharge recording stylus comprises interposing an electrically anisotropic non-recording layer between the recording surface and the discharge recording stylus. The non-recording layer is prepared by dispersing a metal powder in a resin matrix and has a surface resistance of at least 10.sup.8 ohms and a volume resistance of not more than 10.sup.4 ohms-cm. Electric discharge recording is performed through the non-recording layer. A composite discharge recording material comprises (a) an electric discharge-breakable semiconductive resin layer having a surface resistance of 10.sup.5 to 10.sup.16 ohms and a volume resistance of 10.sup.3 to 10.sup.14 ohms-cm, (b) a metal-containing resin layer having a surface resistance of at least 10.sup.8 ohms and a volume resistance of not more than 10.sup.4 ohms-cm, which is laminated on one surface of the semiconductive resin layer (a) and is prepared by dispersing a metal powder in a resin matrix and (c) a conductive layer laminated on the other surface of the semiconductive resin layer (a) and having a surface resistance of not more than 10.sup.4 ohms and a volume resistance of not than 10.sup.2 ohms-cm.

Electric discharge recording method and material with non-recording layer

An electro-thermosensitive recording material comprising (1) a support at least the surface of which is electrically conductive, and (2) a conductive recording layer formed on the conductive surface of the support, the recording layer containing (a) a film-forming chlorine-containing polymer and (b) dispersed in the polymer, an acid-sensitive leuco dye and at least one zinc compound selected from the group consisting of zinc oxide optionally doped with a different metal, zinc hydroxide, zinc sulfide, zinc carbonate, zinc acrylate and zinc stearate.

Electro-thermosensitive recording materials

A method for performing electric discharge recording on the recording surface of an electric discharge recording material using a discharge recording stylus, which comprises interposing an electrically anisotropic non-recording layer between the recording surface and the discharge recording stylus, said non-recording layer being prepared by dispersing a metal powder in a resin matrix and having a surface resistance of at least 10.sup.8 ohms and a volume resistance of not more than 10.sup.4 ohms-cm, and performing electric discharge recording through the non-recording layer; and a composite discharge recording material which comprises (a) an electric discharge-breakable semiconductive resin layer having a surface resistance of 10.sup.5 to 10.sup.16 ohms and a volume resistance of 10.sup.3 to 10.sup.14 ohms-cm, (b) a metal-containing resin layer having a surface resistance of at least 10.sup.8 ohms and a volume resistance of not more than 10.sup.4 ohms-cm, which is laminated on one surface of the semiconductive resin layer (a) and is prepared by dispersing a metal powder in a resin matrix and (c) a conductive layer laminated on the other surface of the semiconductive resin layer (a) and having a surface resistance of not more than 10.sup.4 ohms and a volume resistance of not than 10.sup.2 ohms-cm.

Electric discharge recording material

Method for producing a thermoplastic resin film or sheet useful for chelate color printing which involves contacting at least one surface of a thermoplastic resin film or sheet with a mixed liquid composition comrising (i) a liquid capable of dissolving or swelling said thermoplastic resin, (ii) a liquid having no ability to dissolve or swell said thermoplastic resin, being compatible with said liquid (i) and having a faster rate of evaporation than said liquid (i), and (iii) an inorganic compound containing at least one metal atom selected from the group consisting of iron, vanadium, titanium, molybdenum and tungsten, or an organic compound capable of forming a chelate compound with the metal atom and developing a color, and evaporating off said liquids (i) and (ii), thereby to form a porous surface layer of the film or sheet to which is adhered an uppermost chelate color printing layer comprising said inorganic or organic compound (iii). The mixed liquid composition may also contain an insoluble finely divided substance and a cellulose derivative.

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Suita, Japan

Shiro Nakano