| 摘要 |
PURPOSE:To prevent the decoloration or fading of a printed part of a heat- sensitive recording type magnetic ticket paper which is liable to occur during storage in a season ticket casing made of a synthetic resin, by a method wherein a heat-sensitive color forming layer is formed by using a specified resin as a binder, and a water-soluble polymer film is provided thereon. CONSTITUTION:An ammonium salt of a diisobutylene-maleic anhydride copolymer having a molecular weight of about 10,000-200,000 is used as a binder. Namely, a magnetic recording layer is provided on one side of a support and, on the other hand, a heat-sensitive color forming layer composed of a leuco dye (e.g., 3-dimethylamino-6-methyl-7-anilinofluoran), an acidic substance (e.g., bisphenol A) and said binder is provided on the other side of the support. Furthermore, a protective layer consisting of a water-soluble polymer (e.g., polyvinyl alcohol) having a thickness of about 1-10mu is provided thereon, thus obtaining a heat-sensitive recording type magnetic ticket paper. |
