| 摘要 |
PURPOSE:To prevent a lowering in resistance or releasing of a resistor layer from occurring, by using a polyvinyl butyral resin as a binder for the resistor layer, and interposing an undercoat layer between the resistor layer and the base film so as to improve the adhesion between the resistor layer and the base film. CONSTITUTION:An electrothermal transfer recording medium comprises a resistor layer on one side of a base film, and a thermal transfer ink layer on the other side. In the recording medium, the resistor layer comprises a binder, comprising a polyvinyl butyral resin as a main constituent, and a conductive powder such as carbon black, and an undercoat layer having favorable adhesives is provided between the resistor layer and the base film. A polyester resin, a coupling agent (e.g., alkoxysilane) or the like is used as a main constituent of the undercoat layer. This ensures that the content of the conductive powder such as carbon black can be increased, and the powder can be dispersed favorably. Therefore, the resistance of the resistor layer can be set to a lower value of not more than 2kOMEGA/cm, and the problems such as releasing of the resistor layer at the time of recording will not occur. |
