JPS5494335A - Transparent transfer material for electrostatic latent image transfer type copiers - Google Patents

Abstract

PURPOSE: To increase transparency in such a way that the copying object may be used as positive of an overhead projector or a master for diazo type copying machine by specifying the visible light transmittance of the laminate using a transparent high polymer compound at above 50%.

CONSTITUTION: A conductive layer 2 which contains a conductive polymer and whose volume resistivity is particularly less than 10⁹Ω.cm is coated on one surface of a thin layer base 1 formed of a high polymer compound of high transparency and is then dried. An insulation layer 3 which is composed of a transparent high polymer compound and has a volume resistivity of more than 10¹²Ω.cm is coated to a thickness 20μ or under and preferably 5 to 9μ on such conductive base and is then dried. The surface thereof is made in minute undulation form through corona discharging. Here, the conductive material of chiefly the layer 2 is so selected that the visible light transmittance of the entire part of the laminated becomes 50% or over. Further, a ground zone 4 is provided to the circumferential edge part of the layer 3 in order to prevent double feed owing to electrostatic adsorption.

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