| 摘要 |
PROBLEM TO BE SOLVED: To prevent a defect such as a wrinkle or the like from developing and improve printability, running properties and handleability by a method wherein the heat shrinkage factor in the longitudinal direction of a heat-sensitive transfer printer ribbon at a specified temperature is set to be a specified percentage. SOLUTION: The heat shrinkage factor in the longitudinal direction of a heat-sensitive transfer ribbon is set to be 1% or less at 100 deg.C and 2% or more at 150 deg.C, further preferably 0.7% or less at 100 deg.C and 4% or more at 150 deg.C. Furthermore, their widthwise heat shrinkage stresses at 100 deg.C and 210 deg.C are specified, respectively, to be 30g/mm<2> or more and 60g/mm<2> or more, preferably 100g/mm<2> or more. The heat shrinkage factor in the longitudinal direction at 100 deg.C is indispensable for the prevention of the shrinkage and deformation of film during its long term storage under hot and humid conditions. In addition, the heat shrinkage factor at 150 deg.C is indispensable for the prevention of the development of a wrinkle due to the shrinkage and deformation caused by the contact with a heat sensitive head. |
