Thermal transfer ribbon and preparation method thereof

The invention relates to a thermal transfer ribbon and a preparation method thereof, and belongs to the technical field of soft label printing. The thermal transfer ribbon comprises a back coating layer, a base body, a release layer and an ink layer which are sequentially arranged from top to bottom in an attached mode. The back coating is formed by mixing and then coating the following raw materials in parts by weight: 150-250 parts of a solvent, 15-30 parts of heat-resistant resin, 2-10 parts of a cleaning filler, 0.2-1 part of a lubricant, 0.2-0.5 part of a dispersing agent, 0.2-0.5 part of an antistatic agent and 5-10 parts of a cross-linking agent. The invention also discloses a preparation method of the thermal transfer ribbon. The printing head back coating liquid has the beneficial effects that the filler capable of achieving the cleaning effect is added into the back coating liquid, dregs attached to the printing head are physically scraped off, and therefore the effect of protecting the printing hea