REVERSIBLE THERMAL RECORDING MATERIAL

摘要

PURPOSE:To eliminate deterioration of a reversible thermal recording layer by specifying a composition ratio of maleic anhydride for forming copolymer compound of a protective layer arranged on an upper surface of the recording layer and a ratio of polyamide-epichlorohydrin resin to the copolymer compound. CONSTITUTION:A reversible thermal recording material comprises a reversible thermal recording layer mainly containing normally colorless or light-color electron donative dye precursor and reversible developer for reversibly causing color tone change in the precursor according to difference of a cooling velocity after heating arranged on an upper surface of a support. A protective layer containing saponified compound of copolymer compound of maleic anhydride and vinyl acetate and polyamide-epichlorohydrin resin as main ingredients is arranged on an upper surface of the recording layer. With such a configuration, a composition ratio of the maleic anhydride for forming the copolymer compound is set to 1-20mol%. The polyamide-epichlorohydrin resin is set to 1-35wt.% to the copolymer compound.