Colorful erasable thermo-sensitive paper and preparation method thereof

By designing the color development temperature difference and adding a co-solvent in the thermal coating of colored thermal paper, the problem that existing colorless thermal paper can only be used once is solved, and repeatable rewritable and high-color density printing of colored thermal paper is realized.

CN119824719APending Publication Date: 2025-04-15HUNAN DINGYIYUAN TECH DEV CO LTD +1
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Patent Information

Application Number
CN202510075833.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-17
Publication Date
2025-04-15

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Abstract

The invention relates to color erasable thermal sensitive paper and a preparation method thereof.The color erasable thermal sensitive paper comprises a protective layer, a thermal sensitive coating and a base material layer, and the thermal sensitive coating comprises a yellow thermal sensitive coating, a first middle layer, a magenta thermal sensitive coating, a second middle layer and a cyan thermal sensitive coating which are sequentially arranged from top to bottom; the protective layer is arranged on the yellow thermosensitive coating, and the cyan thermosensitive coating is arranged on the base material layer; the color developing temperature difference among the yellow thermosensitive coating, the magenta thermosensitive coating and the cyan thermosensitive coating is not less than 15 DEG C. According to the color erasable thermo-sensitive paper, the phenomenon of three-color overlapping and bleeding cannot occur after repeated erasing, the color erasable thermo-sensitive paper can be completely erased, repeated erasing is achieved, and the problems that in the prior art, color irreversible thermo-sensitive paper can only be used once, and serious environmental pollution and resource waste are caused are solved.
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Citation Information

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