| 摘要 |
PURPOSE:To prevent the surface roughing of a dyeable layer and deterioration of image preservation by blending a specific compound with each one or more of a urethane bond and an in ether bond a single and one type or more of polyurethane resin at a specific weight ratio as a dyeable resin compound. CONSTITUTION:A compound X of a molecular weight of not more than 2000 having each one or more of a urethane bond and an ether bond in a single molecule is blended with polyurethane resin Y, having one type or more of glass transition temperature of 80 to 150 deg.C and urethane bond density equivalent to 500/10<5>g or higher to 4000/10<5>g or lower, which constitutes a dyeable layer at a ratio of 3 to 100wt.% for the latter. However, the preferable blending ratio is 10 to 60wt.%. The compatibility and affinity of the compound(X) with polyurethane resin(Y) are extremely satisfactory. Therefore, the status of a coated film remains unchanged for a long time and the thermal stability of polyurethane resin(Y) is high at 80 to 150 deg.C of glass transition temperature. Subsequently, dye molecules settling in the dyeable layer are prevented from becoming scattered due to thermal motion. |
