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Can thermal paper be printed on both sides?

Time : 2022-09-27 Hits : 6

The utility model relates to a heat sensitive paper, in particular to a heat sensitive paper which 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, such as the thermal bills and tickets of sales terminals (POS), banks, ticketing and self-service systems at this stage, but they usually can only meet the requirements of single-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, Undoubtedly, it will cause loss and cost increase in the printing process.

In view of the above shortcomings, we provide a double-sided printing thermal paper that can be printed on both sides, and shows different color traces on both sides. It includes a paper base, one side of the base is attached with a thermal layer, the outer side of the thermal layer is covered with a film protective layer, and the other side of the base 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 film interlayer that separates the colorless dye layer from the developer layer. The chromogenic agent layer, the film intermediate layer and the colorless dye layer of each thermal sensitive layer are sequentially overlapped from the outside to the inside. The colorless dye layer of the thermal sensitive layer on one side of the base layer reacts with the developer layer to show a color trace, while the colorless dye layer of the thermal sensitive 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 thermosensitive paper of the utility model comprises a paper base layer, two sides of the paper base layer are respectively attached with a thermosensitive layer, and the outer side of each thermosensitive layer is respectively covered with a film protective layer. When heated, the film intermediate layer corresponding to the thermosensitive layer will melt, the colorless dye layer of the thermosensitive layer contacts with the chromogenic agent layer, and produces a color 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 thermal sensitive layer on both sides of the paper substrate (the formula 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 thermosensitive paper that 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 are attached thermosensitive layers that can produce color reaction and show traces, on the outside of each thermosensitive layer is covered with a transparent film protective layer, each thermosensitive layer includes a colorless dye layer and a developer layer, and a film intermediate layer that separates the colorless dye layer and the developer layer, The chromogenic agent layer, film interlayer and colorless dye layer of each thermosensitive layer are sequentially stacked from the outside to the inside. The colorless dye layer of the thermosensitive layer on one side reacts with the chromogenic agent layer to show one color trace, and the chromogenic reaction on the other side shows another color trace. Under the heating condition, the middle layer of the film in the printing area melts, and the developer layer in this area contacts the colorless dye layer and develops color reaction, showing the printing trace, so it can play a double-sided multi-color printing effect.

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