Provided is a thermal transfer sheet that can suppress thermal fusion of the thermal transfer sheet and a transfer-receiving article and can improve the durability of a printed article obtained by transferring a transfer layer onto the transfer-receiving article, even if energy applied to the thermal transfer sheet was increased upon transferring the transfer layer onto the transfer-receiving article. This thermal transfer sheet 100 comprises a thermal transfer layer 10 on one surface of a substrate 1. The transfer layer 10 comprises one or more layers, and among the layers constituting the transfer layer 10, the layer closest to the substrate 1 contains a copolymer of isobutyl (meth)acrylate and a monomer having a carboxyl group, and the acid value of the copolymer is not less than 40 mg KOH/g.
本发明提供了一种热转印片材,它能够抑制热转印片材和转印接收物品的热熔,并能够提高通过将转印层转印到转印接收物品上而获得的印刷品的耐久性,即使在将转印层转印到转印接收物品上时施加到热转印片材上的能量增加也是如此。该热转印片 100 包括基底 1 一个表面上的热转印层 10。转印层 10 包括一层或多层,在构成转印层 10 的各层中,最靠近基底 1 的一层含有(甲基)
丙烯酸异丁酯和具有羧基的单体的共聚物,共聚物的酸值不低于 40 毫克 KOH/克。