JPH0617143Y2 - Three-dimensional pattern structure - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a three-dimensional pattern structure in which a color pattern changes due to a temperature change, for displaying a pattern such as a desired character or pattern on the surface of an article.

[Conventional technology]

Foaming ink forms a thick and porous ink layer (expansion ratio is, for example, 10 to 50 times) that is foamed and expanded by the foaming action of a foaming agent mixed with ink medium. A foamed ink layer is formed on the product and used as a coating film material for articles, which is applied to, for example, a glass bottle to function as a protective film that prevents the damage due to the cushioning effect of the foamed ink layer, or keeps it cool and warm. It is known that the foam ink layer is useful as a cold / heat-retaining film due to the heat insulating effect of the product (can juice, can coffee, etc.), and its practical examples are various.

In addition, instead of the usual printing ink, the pattern such as letters and designs on the surface of the film and other articles is drawn with foam ink,
The swelling / porous ink layer is also used as an embossed pattern.

[Problems to be solved by the invention] The patterns such as letters and patterns drawn with the foamed ink layer are different from those with ordinary printing ink layers, and have a unique design effect and solid feeling with thick and three-dimensional appearance. Have The invention is
While utilizing the characteristics of the foamed ink layer, the foamed ink layer is provided with a new function to enhance the design effect and provide a three-dimensional pattern structure that enables various usage modes.

[Means for Solving the Problems]

According to the three-dimensional pattern structure of the present invention, the foam ink layer is applied on the surface of the base material in a thin and thin layer corresponding to the uneven pattern to be exposed.
An ink layer containing a temperature-sensitive dye is laminated and applied on the surface of the foamed ink layer, or a foamed ink layer containing a temperature-sensitive ink layer is applied in a layer thickness corresponding to the uneven pattern to be exposed. It is characterized by

[Action]

The temperature-sensitive dye-containing ink layer (foaming ink layer) laminated on the foaming ink layer is affected by heat from the atmosphere in contact with the surface and heat from the side of the substrate acting through the foaming ink layer. Since the foamed ink layer is a heat-insulating layer, the thicker the layer thickness, the more the heat effect (cooling or heating action) from the base material side on the color-forming ink layer is suppressed, and the thin layer thickness part from the base material side. It is easily affected by heat. For this reason, the change in the dye reaction (coloring, discoloration, decoloring) temperature of the foamed ink layer differs depending on the thickness of the foamed ink layer, and the colored ink layer partially varies depending on the thickness of the foamed ink layer. A pigment reaction occurs and a color change occurs.

Instead of the above two-layer structure using two kinds of ink of foaming ink and color-forming ink, even when an uneven pattern is formed with a foaming ink layer containing a temperature-sensitive dye, due to the difference in heat insulation effect due to the thickness of the layer, As a result of the partial difference in surface temperature, the surface layer undergoes a color change due to the dye reaction as described above.

That is, in the three-dimensional pattern structure of the present invention, not only the pattern of characters, patterns, etc. appears as an embossed pattern with a thick and three-dimensional effect due to the unevenness of the foamed ink layer, but also the foamed ink layer Partial dye reaction occurs due to the thickness of the layer, and the color change is visually recognized as a change in the color pattern superimposed on the embossed pattern.

The three-dimensional pattern structure of the present invention is a well-known printing that is selected according to the type of ink and the coating layer thickness of the ink, such as gravure printing and screen printing, using a coloring ink and a foaming ink, or a foaming ink containing a temperature-sensitive dye. It can be formed by applying a method.

The material type of the temperature-sensitive dye can be appropriately selected from various organic or inorganic dyes that have been conventionally used as the dye of the temperature-sensitive color-forming ink, depending on the properties of the target article, use conditions, and the like. . If a reversible reactive dye is used as the temperature-sensitive dye, the change in the color pattern due to the temperature change can be repeated.

〔Example〕

Next, the present invention will be described with reference to the drawings showing an embodiment.

FIG. 1 shows a label attached to the surface of a container M of, for example, a beverage (juice, beer, etc.) to be refrigerated and stored.

10 is a plastic film as a base material, 20 is a foaming ink layer, and 30 is a coloring ink layer. Foamed ink layer 20
Is printed on the base material film 10 in a concavo-convex pattern representing characters, patterns, etc., and the coloring ink layer 30 is laminated and printed on the surface thereof. The color-forming ink layer 30 is an ink layer containing a pigment that reversibly changes color (coloring, discoloring, or erasing) between the cold storage temperature of the target article M and the atmospheric temperature.

When the beverage container M with the label attached and cooled and stored is taken out from the cold atmosphere, the outer surface of the label (coloring ink layer 3
The heat effect of the atmospheric atmosphere in contact with 0) is
However, the cooling action applied from the beverage container M to the coloring ink layer 30 through the foaming ink layer 20 differs depending on the thickness of the foaming ink layer 20. The thicker the foamed ink layer 20 is, the more the cooling action from the container M to the color-forming ink layer 30 is suppressed. Therefore, the color-forming ink layer in that portion is quickly heated by the contact with the atmosphere, and its temperature is changed. In contrast to the above, a coloring reaction occurs, but the coloring ink layer 30 in the thin layer portion has a strong cooling action, and thus the temperature change and the coloring reaction due to the temperature change hardly occur. This partial pigment reaction causes a color change in the uneven pattern. When the container is left for a long time, the temperature difference on the surface of each part is relaxed and equalized, and the uneven pattern becomes the same color due to the dye reaction over the entire surface, but it is also visible as a change in the color pattern. It

When the label 1 is attached to the surface of the cup M in place of the beverage container and a cold beverage is poured into the cup M, the difficulty of the color reaction of the color forming ink layer 30 to occur is opposite to the above, and the foaming ink layer 20. The color-forming ink layer 30 in the thin portion, which has a small heat insulating effect, is strongly subjected to the cooling action and causes a dye reaction in accordance with the temperature change thereof, whereas in the thick portion, the heat insulating effect is strong and the temperature change and the dye reaction accompanying it are caused. Hard to happen. Due to the occurrence of this partial pigment reaction, a change in the color pattern superimposed on the uneven pattern is visually recognized.

A label is produced by replacing the color-forming ink layer 30 of the label 1 with a color-forming ink layer in which a dye reaction reversibly occurs between the air atmosphere and the heating storage temperature, and the label is used for a heated beverage container (coffee can or the like). When it is mounted on the surface, when it is taken out from the warm atmosphere, the color-forming ink layer 30 has a portion where the heat influence from the beverage container is small (a portion where the foam ink layer 20 is thick),
While a dye reaction is likely to occur due to the influence of the atmospheric temperature, the coloring ink layer 30 in the thin portion of the foam ink layer 20 is strongly affected by the heat from the base material 10 side, and the heat influence from the atmosphere is reduced. Therefore, a dye reaction is unlikely to occur. The color pattern changes due to the dye reaction that partially occurs.

When this label is attached to the surface of a cup and the heated beverage is poured into it, the pigment reaction occurs in the opposite manner to the above, and the thin portion of the foamed ink layer 20 changes in temperature due to the heat effect of the injected heated beverage. And a dye reaction accompanying it easily occurs, and is suppressed in a portion where the foamed ink layer 20 is thick. The color pattern changes due to the partial occurrence of the pigment reaction.

FIG. 2 shows another embodiment of the present invention in which a foam ink layer 40 containing a temperature-sensitive dye is used instead of the structure of FIG. 1 in which two kinds of ink, a foam ink layer and a coloring ink layer, are used. The label printed on the material 10 to form a three-dimensional pattern is shown.

In this label, the temperature change on the surface side (skin layer) 41 of the dye-containing foamed ink layer 40 is different between the thick portion a and the thin portion b due to the difference in heat insulating effect.

Therefore, when this label is used by being attached to the surface of a beverage container that is kept cold or kept warm, or is attached to the surface of a cup that pours out a beverage that has been kept cold or warm, the temperature change of the skin layer 41 and the As in the case of the label shown in FIG. 1, the color reaction of the epidermis layer 41 changes due to the difference in the occurrence of the dye reaction in each of the thick and thin portions.

The label 1 shown in FIGS. 1 and 2 can be attached to the target article M by, for example, applying an adhesive or the like to the back surface of the base material 10 and sticking the same.
When a heat-shrinkable plastic film is used as the film, the label 1 is manufactured in a tube shape (the label in the figure has a three-dimensional pattern consisting of the letter F and a circular mark surrounding it). As shown in FIG. 3, by externally fitting the target article M (the figure shows an example of a bottle) and applying heat treatment, the heat shrinkage force of the base film can be brought into close contact with the article surface Ms as a tightening force. .

Further, in place of the structure for forming a three-dimensional pattern of the present invention as a label, the use of a film is omitted, and the surface of the target article is used as the base material surface, which is directly printed to form a desired three-dimensional pattern. Good.

It should be noted that it is free to combine printing of normal color ink with the three-dimensional pattern structure of the present invention, and depending on the design of the pattern to be formed, printing this on the convex portion or the concave portion of the foamed ink layer, There is no obstacle to forming a pattern including a color scheme that does not cause a color change due to a temperature change.

[Effect of device]

According to the present invention, a thick ink layer with a foam ink layer is formed on the surface of an article.
It is possible to form a three-dimensional effect and a three-dimensional pattern in which the color pattern changes in a superimposed manner, and due to this novel design effect, the product value of the article can be increased and the customer's attraction can be strengthened.

The three-dimensional pattern of the present invention enables a wide range of articles to be applied and various usage modes thereof by virtue of the function of changing the color pattern, which is not present in conventional three-dimensional patterns.

[Brief description of drawings]

1 and 2 are sectional views schematically showing an embodiment of a three-dimensional pattern structure of the present invention, and FIG. 3 is a partially cutaway perspective view showing an example of attaching a label having a three-dimensional pattern of the present invention to an article. It is a figure. 10: substrate, 20: foam ink layer, 30: temperature-sensitive dye-containing ink layer, 40: temperature-sensitive dye-containing foam ink layer, 41: skin layer, M: label-attached article.

Claims (1)

[Scope of utility model registration request] 1. A foam ink layer is applied on the surface of a base material so as to have a thickness corresponding to an uneven pattern to be exposed, and a temperature-sensitive dye-containing ink layer is formed on the surface of the foam ink layer. Or a foamed ink layer containing a temperature-sensitive ink layer is applied in a thin and thin layer thickness corresponding to the uneven pattern to be exposed.