Laser heat transfer printing film

The purpose of the present invention is to provide a laser heat transfer film having improved transfer characteristics by using a bismaleimide resin having a high expansion rate as a binder. A laser heat transfer film in which a base film, a photothermal conversion layer, and an adhesive layer are laminated in this order, the photothermal conversion layer being solid at room temperature and containing an infrared absorbent represented by general formula (1) and a bismaleimide resin represented by general formula (3) and/or a bismaleimide resin represented by general formula (4). In general formula (1), p is 1 or 2, R1-R8 are each independently a substituted or unsubstituted linear or branched alkyl group having 1-10 carbon atoms, and X-is a fluoroalkyl phosphate anion represented by general formula (2). 本发明的目的在于提供一种激光热转印膜，其通过将膨胀率大的双马来酰亚胺树脂用于粘结剂从而改善了转印特性。所述激光热转印膜依次层叠有基材膜、光热转换层、粘着层，所述光热转换层在常温下为固体且含有通式(1)表示的红外线吸收剂与通式(3)表示的双马来酰亚胺树脂和/或通式(4)表示的双马来酰亚胺树脂。通式(1)中，p为1或2，R1～R8分别独立地为碳原子数为1～10的取代或未取代的直链状或支链状的烷基，X－为通式(2)表示的