JPH07114340A - Heat-reversible information display label - Google Patents

Abstract

PURPOSE:To increase the contrast to background color and to make a display part sharp by successively forming a protective layer, heat-reversible recording layer, transparent color layer, aluminum vapor deposition layer, polyethylene terephthalate layer, and adhesive layer. CONSTITUTION:The heat-reversible information display label has a laminated structure consisting of a protective layer 11, heat-reversible recording layer 12, transparent color layer 16, aluminum vapor deposition layer 13, polyethylene terephthalate layer 14, and adhesive layer 15 in order from the surface. The transparent color layer 16 is formed between the heat-reversible recording layer 12 and the vapor deposition layer 13. Thus, by forming the transparent color layer 16 on the aluminum vapor deposition layer 13, the hue of the heat- reversible recording layer 12 before display has a metallic color by the additional effect of the hue of the transparent color layer 16 and the silver color of the aluminum vapor deposition. When the surface where the heat-reversible recording layer 12 is formed is printed, the printed part shows white. Thereby, white display on the metallic-colored back ground is obtd. with large contrast to the background color.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-sensitive adhesive label having a thermoreversible recording layer which is rewritable by heat used for a card or the like.

[0002]

2. Description of the Related Art Recently, prepaid cards, which are used as a substitute for cash and can be used until a predetermined amount of money is used up, are widely used as telephonon cards, orange cards, pachinko cards and the like. The card for exchanging prizes used at pachinko parlors has a thermoreversible recording layer on a part of it to visually display information such as date, number of balls, number of prizes, and remaining number. .

In a prize exchange card or the like of a pachinko parlor, as shown in FIG. 1, a protective layer, a thermoreversible recording layer, an aluminum vapor deposition layer, a polyethylene terephthalate layer, and an adhesive layer are laminated in this order from the surface. By attaching the thermoreversible information display label to the card, a heat-sensitive rewrite layer is provided on a part of the card. When the information is printed by printing on the above-mentioned heat-sensitive rewritable label by the thermal printing method, the printed part is whitened and becomes opaque, and the display part can be visually recognized due to the contrast with the silver color of the aluminum vapor deposition layer forming the background. The white letters were not so clear and difficult to see.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to improve the drawback that the display portion of the conventional thermoreversible information display label is difficult to see, and to make the information display portion printed by the thermal printing method easy to see. Is.

[0005]

A thermoreversible information display comprising a protective layer, a thermoreversible recording layer, a transparent colored layer, an aluminum vapor deposition layer, a polyethylene terephthalate layer, and an adhesive layer, which are laminated in this order. It is a label.

[0006]

The thermoreversible information display label has a structure in which a protective layer, a thermoreversible recording layer, a transparent coloring layer, an aluminum vapor deposition layer, a polyethylene terephthalate layer, and an adhesive layer are laminated in this order to form a thermoreversible recording layer. By providing a transparent colored layer between the aluminum vapor-deposited layer and the metallized hue of the background, the contrast between the display portion displayed in white and the background color becomes large and the display portion becomes easy to see.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a laminated structure of a conventional thermoreversible information display label, FIG. 2 is a sectional view showing a laminated structure of a thermoreversible information display label of the present invention, and FIG. 3 is a thermoreversible information display of the present invention. FIG. 4A is a cross-sectional view showing a laminated structure of another embodiment of the label, FIG. 4A is a perspective view showing a printed state on a prepaid card to which the thermoreversible information display label of the present invention is attached, and FIG. 11 is a perspective view showing a state in which the thermoreversible information display label is printed on an ID card, 1 is a thermoreversible information display label, 2 is a prepaid card, 3 is an ID card, 4 is a display unit, 11 Is a protective layer, 12 is a thermoreversible recording layer, 13 is an aluminum vapor deposition layer, 14 is a polyethylene terephthalate layer, 15 is an adhesive layer, 16 is a transparent colored layer, 17 is an adhesive layer, and 18 is a cushion layer.

The structure of the thermoreversible information display label 1 of the present invention is, as shown in FIG. 2, a protective layer 11, a thermoreversible recording layer 12, a transparent coloring layer 16, an aluminum vapor deposition layer 13, and a polyethylene terephthalate layer in order from the surface. 14 and a pressure-sensitive adhesive layer 15 are laminated, and a transparent colored layer 16 is inserted between the thermoreversible recording layer 12 and the vapor deposition layer 13 of the thermoreversible information display label 1. By providing the transparent colored layer 16 on the aluminum vapor-deposited layer 13, the hue of the thermoreversible recording layer 12 before being displayed is colored in a metallic color obtained by multiplying the hue of the transparent colored layer 16 and the silver vapor-deposited aluminum. It becomes a hue. The thermoreversible recording layer 12
Since the printed portion becomes white when printed on the surface, the display portion 4 having a large contrast with the background color printed in white is obtained on the background color colored in metallic.

The thermoreversible recording layer 12 is made of, for example, a resin in which an organic low molecular weight substance is dispersed, and when the particles of the organic low molecular weight substance are polycrystals in the resin, the light transmittance is reduced and the white turbid state occurs. However, when heated to a specific temperature range, the organic low molecular weight substance becomes a semi-molten state and the crystal becomes a single crystal, and the light transmittance becomes the maximum state.The transparent state and the cloudy state are maintained even at room temperature when heat is removed. It has the properties described below. The thermoreversible recording layer 12 is in a transparent state before being printed by the thermal printing method.
When the image is printed at a predetermined temperature by, for example, the thermal printing method, the printed display portion 4 becomes clouded, and the display portion 4 is clearly visible due to the hue contrast with the colored aluminum vapor deposition layer 13 in the background. When the printed display portion is erased, the display portion is made transparent and erased by passing it through a roll heated to a predetermined temperature. Thermoreversible recording layer
As the 12, in addition to the above, consisting of a crystalline polymer in which the particle size of the crystal particles reversibly changes with temperature change,
Heating to a temperature above the melting point of the crystalline polymer, causing a change in the particle size of the crystal particles according to the cooling rate during cooling,
It is possible to use a device having a configuration in which the resulting change in optical characteristics is used for recording.

In the constitution of the thermoreversible information display label 1, the hue of the transparent colored layer 16 provided between the thermoreversible recording layer 12 and the aluminum vapor deposition layer 13 can be set arbitrarily, but Good light colors are suitable. Thermoreversible recording layer 12
However, if the transparent colored layer 16 provided on the surface of the aluminum vapor-deposited layer is made a dark color, the background color cannot be completely hidden by the white display section 4 and the background color cannot be completely hidden. Since the color can be seen through, the contrast between the white display portion 4 and the background color becomes small, making it difficult to see. Transparent colored layer
By making the 16 hues a light color with good transparency, the white display portion 4 completely hides the background color, and the contrast between the white display portion 4 and the background color becomes large, making it easy to see. As the hue of the transparent colored layer 16, yellow, red, blue, and other intermediate colors can be arbitrarily selected. For example, when transparent yellow is used, the white display portion 4 is formed on the gold background color, which is extremely difficult. Easy to see.

The polyethylene terephthalate layer 14 serves as a base material for the thermoreversible information display label 1 and a base film for producing the thermoreversible information display label 1. When the thermoreversible information display label 1 is pasted on the prepaid card 2 and the ID card 3, the aluminum vapor deposition layer 13 and the thermoreversible recording layer 1 are provided in order to make it easy to attach without wrinkles.
2. In order to improve the processability when the protective layer 11 and the pressure-sensitive adhesive layer 15 are provided, a thickness of 25 to 100 μm is suitable.

The transparent colored layer 16 is usually provided on the surface of the aluminum vapor-deposited layer 13 by a gravure printing method, and it is preferable to use a normal temperature two-liquid curing type ink such as urethane. The transparent colored layer 16 is a layer that is interposed between the aluminum vapor deposition layer 13 and the heat-sensitive rewrite layer 12, and can also serve as an anchor coat for improving the adhesiveness when the heat-sensitive rewrite layer 12 is provided on the aluminum vapor deposition layer 13. .

The thermoreversible recording layer 12 is formed by applying a composition composed of a resin in which an organic low molecular weight substance is dispersed onto the surface of the transparent colored layer 16 provided on the polyethylene terephthalate layer 14. The composition constituting the thermoreversible recording layer 12 is usually obtained by applying a solution in which a resin and an organic low-molecular substance are dissolved in a solution and drying the solution.

The purpose of the protective layer 11 is to prevent the thermoreversible recording layer 12 from being physically damaged, and it is necessary to form a film having excellent abrasion resistance and heat resistance. It is preferably thin enough not to hinder the transfer of heat from the thermal head. As the resin used for the protective layer 11, a heat-resistant thermoplastic resin, a thermosetting resin such as a urethane resin or an acrylic resin, or an ultraviolet curable resin can be used.

In the laminated structure of the thermoreversible information display label 1 shown in FIG. 2, the cushion layer 18 may be inserted between the polyethylene terephthalate layer 14 and the adhesive layer 15 to form the structure shown in FIG. The cushion layer 18 is laminated on the surface of the polyethylene terephthalate layer 14 with the adhesive layer 17.
With the above-mentioned structure, the thermoreversible information display label 1 is attached to the surface having a little unevenness like the ID card 3 which is made of a plastic molded product and has an IC, a coil and the like housed therein. Even in this case, printing can be performed accurately without uneven printing due to unevenness. As the cushion layer 17, a biaxially stretched film having micro voids (voids) made of polyethylene, polypropylene, polyester or the like is suitable. The thickness of the cushion layer 17 is determined in relation to the total thickness of the heat-sensitive rewritable label 1, but is preferably 30 to 150 microns.

In the method of manufacturing the thermoreversible information display label 1 shown in FIG. 2, a vapor deposition layer 13 made of aluminum vapor deposition is provided on one surface of the polyethylene terephthalate layer 14, and a transparent coloring layer 16 is printed or coated on the vapor deposition layer 13 surface. The thermoreversible recording layer 12 is provided on the transparent colored layer 16 surface by coating, and the protective layer 11 is provided on the thermoreversible recording layer 12 surface. layer
15 is provided and a release paper is laminated on the surface of the adhesive layer 15 to complete the thermoreversible information display label.

In the method for producing the thermoreversible information display label 1 shown in FIG. 3, first, the cushion layer 18 is laminated on the polyethylene terephthalate layer 14 by using a urethane adhesive, and then the laminated polyethylene of the laminate is prepared. On the terephthalate layer 14 surface, in the same manner as above, the vapor deposition layer 13, the transparent coloring layer 16, the thermoreversible recording layer.
12, after providing the protective layer 11, the adhesive layer on the cushion layer 18 surface
15 is provided and a release paper is laminated on the surface of the adhesive layer 15 to complete the thermoreversible information display label.

The thermoreversible information display label described with reference to FIGS. 2 to 3 is a state in which a release paper is laminated on the surface of the adhesive layer 15 and cut into a predetermined size, or the thermoreversible information display label 1 is formed. After the release paper was laminated on the surface of the adhesive layer 15, half-cutting was performed by leaving only the release paper and unnecessary parts were removed from the release paper. The thermoreversible information display labels 1 were evenly spaced like islands on the release paper surface. Figure 4
It is attached to the prepaid card or IC card shown in (a) and (b). The latter is superior in terms of workability when used.

[0019]

The thermoreversible information display label is a thermoreversible recording layer in which a protective layer, a thermoreversible recording layer, a transparent coloring layer, an aluminum vapor deposition layer, a polyethylene terephthalate layer and an adhesive layer are laminated in this order from the surface. The thermoreversible recording layer before printing becomes a metallic coloring layer by forming a transparent coloring layer between the aluminum vapor deposition layers. When printing is performed on the thermoreversible recording layer by the thermal printing method, the printed display portion becomes white, so that the contrast with the background color becomes large and the display portion becomes clear.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a laminated structure of a conventional thermoreversible information display label.

FIG. 2 is a sectional view showing a laminated structure of the thermoreversible information display label of the present invention.

FIG. 3 is a cross-sectional view showing a laminated structure of another embodiment of the thermoreversible information display label of the present invention.

FIG. 4A is a perspective view showing a state of printing on a prepaid card to which the thermoreversible information display label of the present invention is attached,
(B) is I to which the thermoreversible information display label of the present invention is attached
The perspective view which shows the state printed on the D card.

[Explanation of symbols]

 1 thermoreversible information display label 2 prepaid card 3 ID card 4 display section 11 protective layer 12 thermoreversible recording layer 13 aluminum vapor deposition layer 14 polyethylene terephthalate layer 15 adhesive layer 16 transparent colored layer 17 adhesive layer 18 cushion layer

Claims (1)

[Claims] 1. A protective layer, a thermoreversible recording layer, a transparent colored layer,
A thermoreversible information display label comprising a structure in which an aluminum vapor deposition layer, a polyethylene terephthalate layer, and an adhesive layer are sequentially laminated.