THERMAL TRANSFER SHEET

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PROBLEM TO BE SOLVED : To provide a thermal transfer sheet having high heat resistance, hardly causing a shift of dye to a heat-resistant slipping layer and re-transition of the shifted dye, excelling in the pot life of a coating liquid for the heat-resistant slipping layer for manufacturing the heat-resistant slipping layer, and easily and stably manufactured. SOLUTION : The thermal transfer sheet has a thermal transfer coloring material layer on one face of a base material film, and the heat-resistant slipping layer formed on the other face. The heat-resistant slipping layer contains heat-resistant slipping layer resin containing aliphatic polycyclic (meth)acrylate as a monomeric unit, wherein a copolymerization ratio of the aliphatic polycyclic (meth)acrylate is 45-95% at a mass ratio. The heat-resistant slipping layer resin has a glass transition temperature (Tg) of 115-150°C at a value obtained by converting absolute temperature (K) computed by expression (1) : 1/Tg=Σ(wi/Tgi) into centigrade (°C), and a weight average molecular weight (Mw) of 50, 000-500, 000. In expression (1), wi represents a mass fraction of a monomer (i) composing the heat-resistant slipping layer resin, Tgi represents a glass transition temperature of a homopolymer of the monomer composing the heat-resistant slipping layer resin, and both Tg and Tgi are absolute temperature (K). COPYRIGHT : (C)2010, JPO&INPIT