Reversible thermosensitive recording medium
A reversible thermosensitive recording medium including an electronic information recording sheet having at least an electronic information recording element projecting from a surface thereof, a first sheet having a through hole into which the electronic information recording element can be inserted, and a second sheet having a cut-out portion capable of housing the entire electronic information recording sheet, wherein the second sheet houses in the cut-out portion the entire electronic information recording sheet, with being laid over the first sheet, and the electronic information recording element inserted into the through hole.
1. A reversible thermosensitive recording medium comprising:
an electronic information recording sheet having at least an electronic information recording element projecting from a surface thereof,
a first sheet having a through hole into which the electronic information recording element can be inserted,
a second sheet having a cut-out portion capable of housing the entire electronic information recording sheet,
a base sheet,
a reversible thermosensitive recording sheet and
a third sheet disposed between the second sheet and the reversible thermosensitive recording sheet,
wherein the second sheet houses in the cut-out portion the entire electronic information recording sheet, with being laid over the first sheet, and the electronic information recording element is inserted into the through hole,
wherein the first sheet, the second sheet housing the entire electronic information recording sheet, and the reversible thermosensitive recording sheet are laid over the base sheet in this order; and the electronic information recording element projects toward the base sheet and is inserted into the through hole and
wherein a thickness A of the second sheet, a maximum thickness B of the electronic information recording sheet, excluding a thickness of the electronic information recording element, and a thickness C of the third sheet satisfy the relation 0.00≦an absolute value of (A−B)/C≦0.15.
2. The reversible thermosensitive recording medium according to claim 1 , wherein the first, second and third sheets are formed of polyethylene terephthalate.
3. The reversible thermosensitive recording medium according to claim 1 , wherein the third sheet has the same surface area as the base sheet and as the reversible thermosensitive recording sheet.
4. The reversible thermosensitive recording medium according to claim 1 , wherein the reversible thermosensitive recording layer contains a leuco dye and at least one selected from compounds represented by the following General Formulas (1) and (2):
where X and Y each represent a hetero atom-containing divalent organic group, R 1 represents a substituted or unsubstituted divalent hydrocarbon group, R 2 represents a substituted or unsubstituted monovalent hydrocarbon group, a is an integer of 1 to 3, b is an integer of 1 to 20, and c is an integer of 0 to 3,
where Z represents a hetero atom-containing divalent organic group, R 3 represents a substituted or unsubstituted divalent hydrocarbon group, R 4 represents a substituted or unsubstituted monovalent hydrocarbon group, and d is an integer of 1 to 3.
5. The reversible thermosensitive recording medium according to claim 1 , wherein a gap between a periphery of the electronic information recording sheet and a periphery of the cut-out portion is 0.0 mm to 0.1 mm.
6. The reversible thermosensitive recording medium according to claim 1 , wherein a thickness of the second sheet falls within a range of ±10 μm of a maximum thickness of the electronic information recording sheet, excluding a thickness of the electronic information recording element.
7. The reversible thermosensitive recording medium according to claim 1 , further comprising an adhesive layer disposed between the first sheet and the second sheet housing in the cut-out portion the entire electronic information recording sheet,
wherein a difference obtained by subtracting a height of the electronic information recording element from a total thickness of the first sheet and the adhesive layer is 0 μm to 25 μm.