JP2000335141A - Calendar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce consumption amount of a sheet and to help save resources by displaying date information of each month of the calendar by sheets of a half of the sheets used for a conventional calendar. SOLUTION: The calendar displays date information 3a of each month on a surface of a base material 2. In this case, a masking layer 4 using a heat- sensitive achromizing ink is formed on a region displayed with the information 3a of each month, and date information 5a of the month before the previous month of the information 3a displayed on the surface of the material 2 is displayed by a heat-sensitive achromizing ink 5 of the color different from that of the layer 4 on the layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a calendar displaying date information for each month, and to a calendar capable of displaying twice the date information on the base material area of the calendar.

[0002]

2. Description of the Related Art Conventionally, a calendar generally displays each date for each day of the week by printing each month, and when each month ends, turns or tears a calendar sheet on which date information of the month is displayed. Then, it is common to use the calendar paper on which the date information of the next month is displayed. In addition, it is necessary to provide a space on the calendar paper for displaying date information of each month of 12 months in one year, and although the size of the calendar paper varies, the date information of January is displayed. I had to prepare 12 times the paper space.

[0003] Therefore, in order to make it easy to see the date information for each month on the calendar, the date display may be enlarged, but naturally the size of the calendar paper is also increased, and the amount of paper used for the entire calendar is increased. And the amount of paper consumption is large, resulting in waste of resources. If the amount of paper is to be reduced, date information for each month of the calendar must also be displayed in a small space, making it inconvenient to view from a distance.

[0004]

SUMMARY OF THE INVENTION The present invention reduces the paper consumption by displaying date information for each month of the calendar on half of the paper used for the conventional calendar. And a calendar capable of saving resources.

[0005]

According to a first aspect of the present invention, there is provided a calendar according to the present invention, wherein a month-based date information is displayed on a substrate surface. A concealing layer using a heat-sensitive decolorable ink erasable by heating is formed on the area where the information is displayed, and the date information of the month before the previous month of the date information displayed on the base material surface on the concealing layer is The image is displayed with a thermosensitive decolorable ink that can be erased by heating a color different from that of the concealing layer.

According to a second aspect of the present invention, there is provided the calendar according to the first aspect, wherein the heat-sensitive decolorable ink comprises an ink composition dispersed in a solvent, and the ink composition comprises a color forming compound. And a developer and an erasing agent,
The color developing compound and the color developer interact with each other to form a color, and the erasing agent preferentially dissolves the color developing compound and the color developing compound when the ink composition is melted. It is an ink having properties.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a plan view showing a first embodiment of the calender of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG. 3 decolorizes the calender of FIG. FIG. 4 is a plan view showing the state of FIG.
5 is a cross-sectional view taken along the line B, FIG. 5 is a plan view showing a second embodiment of the calender of the present invention and a method of using the same, and FIG.
It is each sectional drawing of a line, DD line, and EE line.

The calendar 1 of the present invention has date information 3 for each month on a surface of a calender base material 2 by using a general ink 3.
a, for example, dates corresponding to each day of the week and each day of the month are printed and displayed. Then, in a state where the monthly date information 3a displayed by the general ink 3 is covered, a concealing layer 4 is formed on the display area of the date information 3a using a thermosensitive decolorable ink which can be decolored by heating. Have been. The concealing layer 4 is preferably a single color such as white as much as possible.

On the concealing layer 4, date information 5 a of a month before the month preceding the date information displayed on the surface of the base material is different from the concealing layer 4 and can be decolorized by heating. The color ink 5 is displayed. For example, in FIG.
The date information for January is displayed on the concealing layer 4, but the date information for February is displayed on the base material 2 below the concealing layer 4, as shown in FIG. This is because the concealing layer 4 is turned into the decolored state by heating, so that it can be switched to the date information of a new month in a chronological order.

In the calendar 1 of the present invention, the concealing layer 4 and the date information 5a displayed on the concealing layer 4 are formed by using the heat-sensitive decolorable ink 5 that can be decolored by heating and are displayed by printing.

Thermal decolorable ink 5 that can be decolorized by heating
Are basically three of a coloring compound, a color developer, and an erasing agent.
It consists of components. The color-forming compound here is a precursor compound of a dye, and the color developer is a compound that colors the color-forming compound by an interaction such as transfer of electrons with the color-forming compound, and the erasing agent is It is a compound having the property of preferentially dissolving either a color developing compound or a developer at the time of melting. When these three components coexist, they take two states, a color development state and a color erasing state. In one state, since the coloring compound and the developer are present beyond the equilibrium solubility of the erasing agent, the coloring compound and the developer within the range of the equilibrium solubility are not colored but exceed the equilibrium solubility. This is a color development state as a result of the interaction between the color developing compound and the developer. The other state is a decolored state in which the erasing agent takes up a large amount of the color developing compound or the developer beyond the equilibrium state and the interaction of the color developing compound or the developer is reduced. .

If it is assumed that the erasing agent has a property of preferentially dissolving the color developing agent at the time of melting, at room temperature, each phase of the color developing compound, the color developing agent and the erasing agent is in a state where the phases are separated. Is close to the equilibrium state, and in this state, the color-forming compound and the color developer are brought into a colored state as a result of the interaction. When the material in this state is heated to a temperature equal to or higher than the melting point, the color developer is preferentially dissolved in the molten erasing agent and interacts with the color forming compound, resulting in a decolored state. When the three components in the molten state are quenched, the erasing agent becomes amorphous by taking in a developer in an amount exceeding the equilibrium solubility and becomes colorless at room temperature. Although this colorless state is not an equilibrium state, it has a sufficiently long life if it is lower than the glass transition point, and does not easily transition from an amorphous state to an equilibrium state even at a temperature higher than the glass transition temperature.

Examples of the coloring compound include leuco auramines, diaryl phthalides, polyaryl carbinols, acyl auramines, aryl auramines, rhodamine B lactams, indolines, spiropyrans,
Electron-donating organic compounds such as fluorans.

Specific examples of the color-forming compound include crystal violet lactone, malachite green lactone, 2-anilino-6- (N-cyclohexyl-N-methylamino) -3-methylfluoran, and 2-anilino-
3-methyl-6- (N-propylamino) fluoran,
3- [4- (4-phenylaminophenyl) aminophenyl] amino-6-methyl-7-chlorofluoran, 2
-Anilino-6- (N-methyl-N-isobutylamino) -3-methylfluoran, 2-anilino-6- (dibutylamino) -3-methylfluoran, 3-chloro-
6- (cyclohexylamino) fluoran, 2-chloro-6- (diethylamino) fluoran, 7- (N, N-
Dibenzylamino) -3- (N, N-diethylamino)
Fluoran, 3,6-bis (diethylamino) fluoran-γ- (4′-nitroanilino) lactam, 3-diethylaminobenzo [a] -fluoran, 3-diethylamino-6-methyl-7-aminofluoran, 3-diethylamino- 7-xylidinofluoran, 3- (4-diethylamino-2-ethoxyxenyl) -3- (1-ethyl-2-methylindol-3-yl) -4-azaphthalide, 3- (4-diethylaminophenyl) -3 -(1-
Ethyl-2-methylindol-3-yl) phthalide,
3-diethylamino-7-chloroanilinofluoran,
3-diethylamino-7,8-benzofluoran, 3,
3-bis (1-n-butyl-2-methylindole-3
-Yl) phthalide, 3,6-dimethylethoxyfluoran, 3,6-diethylamino-6-methoxy-7-aminofluoran, DEPM, ATP, ETAC, 2- (2
-Chloroanilino) -6-dibutyldinofluoran, crystal violet carbinol, malachite green carbinol, N- (2,3-dichlorophenyl) leuco auramine, N-benzoyl auramine, rhodamine B lactam, N-acetyl auramine, N-phenyl auramine, 2- (phenyliminoethanedylidene)-
3,3-dimethylindoline, N, 3,3-trimethylindolinobenzosubiropyran, 8'-methoxyN,
3,3-trimethylindolinobenzosubiropyran, 3
-Diethylamino-6-methyl-7-chlorofluoran, 3-diethylamino-7-methoxyfluoran, 3
-Dielamino-6-benzyloxyfluoran, 1,
2-benzo-6-diethylaminofluoran, 3,6-
Di-p-toluidino-5-dimethylfluorane, phenylhydrazide-γ-lactam, 3-amino-5-methyl-fluoran and the like. These can be used alone or as a mixture of two or more kinds.

The color developing agents which are components of the ink composition used in the present invention include phenols, phenol metal salts,
Carboxylic acid metal salts, benzophenones, sulfonic acids,
Acid compounds such as sulfonates, phosphoric acids, metal phosphates, acid phosphates, metal acid phosphates, phosphorous acid, metal phosphites, and the like, and again, alone or in combination of two or more. Then, they can be mixed and used.

The erasing agent used in the present invention is preferably as amorphous and colorless and transparent. For this reason, the molecular weight is large, the melting enthalpy change of the crystal per weight is small,
It is desirable that the compound has a small maximum crystal growth rate. Those having a nearly spherical and bulky molecular skeleton such as a steroid skeleton are preferred. The higher the affinity of the developer for the erasing agent is, the higher the solubility of the developer is. For example, a compound having an alcoholic hydroxyl group is suitable. From the viewpoint of the stability of the three components in the decolored state, the glass transition temperature of the erasing agent is preferably room temperature (25 ° C.) or higher, and more preferably 50 ° C. or higher. Preferably, the transition temperature is 150 ° C. or less. Erasers that satisfy these are (a) sterol processed products, (b) cholic acid, lithocholic acid, testosterone, and cortisone, and derivatives thereof, and (c) 5- or more-membered rings having one or more hydroxyl groups. It is a non-aromatic cyclic compound.

Specific examples of the sterol processed product (a) include cholesterol, stigmasterol, pregnenolone, methylandrostenediol, estradiol benzoate, epiandrostene, stenolone, β
-Sitosterol, pregnenolone acetate, β-cholestenol, 5,16-pregnadien-3β-ol-20-one, 5α-pregnene-3β-ol-2
0-one, 5-pregnene-3β, 17-diol-2
0-one 21-acetate, 5-pregnene-3β,
17-diol-20-one 17-acetate, 5-
Pregnene-3β, 21-diol-20-one 21
-Acetate, 5-pregnene-3β, 17-diol diacetate, locogenin, tigogenin, esmilagenin, hecogenin, diosgenin and derivatives thereof. These can be used alone or as a mixture of two or more kinds. Among them, those suitable for obtaining a stable decolored state include methylandrostenediol, hecogenin, locogenin, tigogenin, diosgenin, and esmilagenin.

(B) Specific examples of cholic acid, lithocholic acid, testosterone, and cortisone, and derivatives thereof, include cholic acid, cholic acid methyl ester,
Examples include lithocholic acid, lithocholic acid methyl ester, hydroxycholic acid, hydroxycholic acid methyl ester, testosterone, methyltestosterone, 11α-hydroxymethyltestosterone, and hydrocortisone. Among them, those having two or more hydroxyl groups are particularly preferable.

(C) Examples of the non-aromatic cyclic compound having five or more rings having one or more hydroxyl groups include alicyclic monohydric alcohols (for example, cyclododecanol) and alicyclic monohydric alcohols. Dihydric alcohols (for example, 1,4-cyclohexanediol, 1,2-cyclohexanediol,
1,2-cyclododecanediol), saccharides and derivatives thereof (for example, glucose and saccharose), and alcohols having a cyclic structure (for example, 1,2,5,6-diisopropylidene-D-mannitol).

In the above, the erasing agent of (b) has a very high compatibility with the color developer at the time of melting as compared with the erasing agent of (a), and it is difficult to cause phase separation even if the three components are separated. (C)
The erasing agent of (a) has a high affinity with the erasing agent of (a), and hardly causes phase separation even after solidification.

A thermosensitive decolorizable ink composition is obtained by dispersing the above three components of a color former, a color developer and an erasing agent in a solvent in a color-developed state. The compounding ratio of each component is such that the color former is 1 part by weight, the developer is 0.1 to 10 parts by weight,
More preferably, it is 1 to 2 parts by weight. When the amount of the developer is less than 0.1 part by weight, color development is insufficient, and when the amount exceeds 10 parts by weight, it is difficult to sufficiently reduce the interaction between the two. The erasing agent is added to 1 part by weight of the coloring compound.
To 200 parts by weight, more preferably 10 to 100 parts by weight. If the amount is less than 1 part by weight, it is difficult to cause a state change between the color-developed state and the decolored state, and if it exceeds 200 parts by weight, the coloration of the ink is sufficient.

The solvent of the thermal decoloring ink composition is preferably water, but an organic solvent can be used. When using an organic solvent, a color former, a developer, and an erasing agent may be dispersed using a surfactant,
It is more preferable that these are microencapsulated and dispersed. The ratio of the coloring compound, the color developer and the erasing agent in the ink composition is preferably from 0.1 to 10% by weight, and if it is less than 0.1% by weight, a sufficient print density can be obtained. If the content is more than 10% by weight, the viscosity of the ink composition becomes excessive and printing may be difficult. Further, it is preferable that the color-forming compound, the color developer, and the erasing agent dispersed in the solvent are submicron-order particles that do not include particles of 10 μm or more.

[0023]

Next, an embodiment of the calendar according to the present invention will be described. FIGS. 1 to 4 show a first embodiment of the calendar 1 of the present invention, in which date information for one month is displayed on the appearance of one piece of calendar paper. This is printed and displayed with the date information for months superimposed. By heating the surface when the month changes, the upper layer of the thermal decoloring inks 4 and 5 can be made transparent so that the date information of the next month printed and displayed on the calendar paper base material can be viewed. It is intended to be. Therefore, in the calendar of the first embodiment, it is sufficient to use six calendar sheets for one year.

Next, as shown in FIGS. 5 (a) and 6 (a), a second embodiment of the calender of the present invention is shown in FIG. The date information is displayed side by side, but the date information is printed and displayed under the respective date information in a superimposed state. Date information is displayed. Therefore, in the calendar 1a of the second embodiment, it is sufficient to use three calendar sheets for one year.

For example, in FIGS. 5 and 6, date information from January to April is displayed on one piece of calendar paper. First, as shown in FIG. As described above, the March date information 7 and the April date information 8 are printed and displayed side by side using ordinary general printing ink. A concealing layer 10 of erasable ink is formed on the upper layer so as to cover the respective date information 7 and 8. Also, as shown in FIGS. 5A and 6A, the January date information 11 is provided above the concealing layer 10 and above the area where the March date information 7 is displayed. Printed and displayed with an ink that is a heat-sensitive decolorable ink and the color of the ink is different from the color of the concealing layer 10. Similarly, on the upper side of the concealing layer 10 and above the area where the April date information 8 is displayed, the February date information 12 is a heat-sensitive decolorable ink and the color of the ink is Printed and displayed with ink different from the color.

The method of using the calendar 1a according to the second embodiment will be described. First, the date information of January and February is printed on the base material 6 of the first calendar paper in a side-by-side state using the thermosensitive decoloring ink. First, when the area in which the date information 11 of January is displayed is heated by a heater or the like when it is March, as shown in FIGS. 5B and 6B, Then, the portion printed with the thermal decoloring ink is erased, and the March date information 7 printed below the portion becomes visible. Next, when the area where the February date information 12 is displayed is heated by a heater or the like in April, as shown in FIG. 5C and FIG. The portion printed with the ink is erased, and the date information 8 of April printed below the portion becomes visible. As described above, by using the date information of each month displayed in two layers, the date information on the lower side can be made visible as necessary, so that the date information of a normal calendar can be reduced to half paper. It can be configured by using the area.

[0027]

As described above in detail, the calendar of the present invention can display date information for each month of the calendar on half of the paper used for the conventional calendar. Therefore, the amount of paper consumption can be reduced by half, and resource saving can be achieved.

[0028]

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a calendar according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a plan view showing a state in which the heat-decolorable ink has been erased by heating the calender of FIG. 1;

FIG. 4 is a sectional view taken along line BB of FIG. 3;

FIG. 5 is a plan view showing a second embodiment of the calendar of the present invention and a method of using the same.

FIG. 6 is a sectional view taken along line CC, DD, and EE in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Calendar 2,6 Base material 3,5 Thermal decoloring ink 4,10 Concealment layer 3a, 5a, 7,8,11,12 Date information

Claims (2)

[Claims] In a calendar in which monthly date information is displayed on a surface of a base material, a concealing layer using a thermosensitive decolorable ink is formed on an area where the monthly date information is displayed, wherein the concealing layer is formed. A calendar, wherein date information of a month before the previous month of the date information displayed on the surface of the base material is displayed by a thermosensitive decoloring ink of a color different from that of the concealing layer. 2. The calender according to claim 1, wherein the thermosensitive decolorable ink comprises an ink composition dispersed in a solvent, and the ink composition comprises a color former, a developer, and an erasing agent. Wherein the color former and the color developer interact with each other to form a color, and the erasing agent preferentially prefers one of the color developer and the color former when the ink composition is melted. A calender, which is an ink having a dissolving property.