| 摘要 |
PURPOSE:To achieve a high-quality printing and enhance the strength of a ribbon, by coating a metallic thin film layer of a base film with an electrically conductive ink prepared by mixing carbon black into an isocyanate-modified polymer type polyurethane resin, and providing a heat-fusible ink layer on the other side of the base film by coating. CONSTITUTION:A film prepared by vapor-depositing a metal on a polyester film having excellent heat resistance and tensile strength or an aluminum foil is used as a base film. An electrically conductive ink prepared by mixing carbon black into an isocyanate-modified polymer type polyurethane resin which is heat-resistant and flexible is applied to the base film, and the resultant material is used. The polyester film has a thickness of 3-12mum, and a metal such as aluminum is vapor-deposited thereon. As a result, an excellent mechanical strength is obtained, and the melting of the conductive ink or the melting-out of carbon black will not occur at the time of current-sensitized printing, so that printing quality is maintained even in high-speed continuous printing. |
