Can thermal paper be printed on both sides?

There is a thermal paper, in particular to a double-sided printing thermal paper that can be printed on both sides and has different color traces on both sides.

With the rapid development of thermal printing technology, the use of thermal paper has become more and more popular. For example, at the present stage, thermal bills and tickets in sales terminals (POS), banks, ticketing and self-service systems can only meet one-sided thermal printing. When some businesses need to advertise on the other side of the printing paper or print on both sides, they also need to print advertising information on the back of the thermal paper, No doubt in the printing process, it will cause loss and cost increase.

In view of the above shortcomings, we provide a double-sided printing thermal paper that can be printed on both sides and show different color traces on both sides. It includes a paper base layer. One side of the base layer is attached with a thermal layer, and the outer side of the thermal layer is covered with a film protective layer. The other side of the base layer is also attached with a thermal layer, and the outer side of the thermal layer is covered with a film protective layer. Each thermosensitive layer includes a colorless dye layer, a developer layer that reacts with the colorless dye layer, and a thin film intermediate layer that separates the colorless dye layer and the developer layer. The chromogenic agent layer, the film intermediate layer and the colorless dye layer of each thermosensitive layer are sequentially stacked together from the outside to the inside. The colorless dye layer of the thermosensitive layer on one side of the base layer reacts with the developer layer to show one color trace, and the colorless dye layer of the thermosensitive layer on the other side of the base layer reacts with the developer layer to show another color trace. The beneficial effects of the utility model the double-sided printing thermal paper of the utility model includes a paper base layer, two sides of the paper base layer are respectively attached with thermal layers, and the outer side of each thermal layer is respectively covered with a thin film protective layer. When heated, the thin film intermediate layer of the corresponding thermal layer will melt, and the colorless dye layer of the thermal layer will contact with the color developing agent layer and produce a color developing reaction, so as to display the corresponding trace (content to be printed), Therefore, both sides of the thermal paper can be printed; In addition, the formula of the colorless dye layer of the thermosensitive layer on both sides of the paper base layer (which determines the color displayed by the color reaction) is different, and the color of the trace displayed by the color reaction is also different, which can achieve the purpose of multi-color printing.

This double-sided printing thermal paper, which can be printed on both sides and show different color traces on both sides, includes a paper base layer. On both sides of the base layer, there are heat sensitive layers that can produce color reaction and show traces. The outer side of each heat sensitive layer is covered with a transparent film protective layer. Each heat sensitive layer includes a colorless dye layer and a color developing agent layer, and a film intermediate layer that separates the colorless dye layer and the color developing agent layer, The colorant layer, film intermediate layer and colorless dye layer of each thermosensitive layer are sequentially stacked together from the outside to the inside. The colorless dye layer of the thermosensitive layer on one side reacts with the colorant layer to display one color trace, and the other side reacts to display another color trace. Under the condition of heating, the film intermediate layer in the printing area melts, and the developer layer in this area contacts with the colorless dye layer and undergoes color reaction, showing the printing trace. Therefore, the effect of double-sided multi-color printing can be achieved.