| 摘要 |
PURPOSE:To prevent a dye from being transferred to a recording medium at room temperature and enhance resolution and sensitivity, by providing a water-soluble resin material with a sealing film for preventing a water-soluble resin material from leaking on the side faced to a thermal head. CONSTITUTION:The water-soluble resin material 7 obtained by dispersing a dye-containing liposome 6 in a water-soluble resin is provided with the sealing film 2 for preventing the material 7 from leaking on the side faced to a thermal head. The dye is isolated by the liposome 6 at room temperature, but when the sheet is heated from above the sealing film 1, the liposome 6 is melted, and a portion of the dye 3 is melted or sublimed to exude onto a transfer-type thermal recording medium, thereby recording. The liposome has a bimolecular-film consruction formed by association of a long- chain dialkyldimethylammonium salt and a phase transition temperature of Tc, and maintains the bimolecular-film costruction at temperatues not higher than Tc. At temperatures not lower than Tc. a phase transition occurs to make the liposome fluidic, so that a hydrophobic substance taken therein is released. The sealing film is a polymer film, a condenser paper or the like. Accordingly, a sheet free of transfer of a dye to a recording medium at room temperature and having excellent resolution and sensitivity can be obtained. |
