| 摘要 |
<p>PURPOSE:To make the display rewritable by providing a magnetic recording part, and a display layer constituted of a heat reversible material obtained by dissolving a resin and an organic low molecular substance in a solvent. CONSTITUTION:A railroad ticket card 1 is constituted so that on the display side, a rewritable display layer 3 consisting of a heat reversible material is provided on the whole surface on a substrate 2, and on its upper face, a transparent overcoat layer 5 for protecting the card is provided, and on the reverse side, a magnetic layer 6 being a magnetic recording part is provided on the whole of the substrate 2. The display layer 3 is constituted by dissolving a resin and an organic low molecular substance in a solvent, constituted so that an organic low molecular substance 3b exists in a resin part 3a, and in the case a particle of the organic low molecular substance 3b becomes comparatively large single crystal, the whole becomes transparent, and in the case the particle becomes a polycrystal, the whole becomes a nebulous state. In such a way, rewriting of the display layer 3 can be executed.</p> |
