| 摘要 |
PURPOSE:To maintain flexibility without any reduction in elongation at break even upon mixing an electric conductivity imparting agent such as carbon black by a construction wherein a resin matrix of a resistor layer comprises a mixture of an aromatic polycarbonate with an aliphatic polycarbonate polyurethane. CONSTITUTION:A resistor layer comprises an electrically conductive agent and a resin matrix, and the resin matrix comprises a mixture of an aromatic polycarbonate with an aliphatic polycarbonate polyurethane, in an electrothermal transfer material comprising the resistor layer 1, a conductor layer 2 and an ink layer 3. The aliphatic polycarbonate polyurethane has high strength and pliability, and upon being added to the aromatic polycarbonate, it shows compatibility with the aromatic polycarbonate to reduce hardness while maintaining the excellent heat resistance and high elongation at break of the aromatic polycarbonate. The content of the aliphatic polycarbonate polyurethane in the resin matrix is preferably 5-60wt.%. If the content is less than 5wt.%, the elongation at break is lowered, whereas if the content exceeds 60wt.%, the heat resistance is lowered. |
