JPH0367520B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a decorative label having a metallic luster pattern, and an object of the present invention is to produce a beautiful metallic luster pattern rich in variety on a molded product exhibiting a three-dimensional shape. The purpose of the present invention is to provide a method for manufacturing a decorative label that can express the following.

One of the decorative processing methods for the purpose of enhancing the design effect of molded products exhibiting a three-dimensional shape, especially the surface of a molded product exhibiting a three-dimensional curved surface, is a method that uses heat-shrinkable plastic film. However, all conventional methods have the disadvantage that the decorated surface is monotonous.
It has not yet reached the point where it fully satisfies the needs of users. That is, in the conventional method, a decorative label made by simply printing multiple colors on a heat-shrinkable plastic film is attached to the surface of a molded product, and then heated to heat-shrink the decorative label and adhere it tightly. This is because most of the molded products are simply made with monotonous patterns such as letters and designs on the surface of the molded product. In addition, there are some decorative labels that can create a decorative surface with metallic luster by combining the multicolor printing layer and a metal vapor deposition layer. It is similar to the above-mentioned decorative label with multicolor printing in that it only has a uniform metallic luster and its decorated surface is monotonous. Therefore, none of the conventional methods has reached the point where it fully satisfies the needs of users.

In view of the current situation, the present inventors have discovered that it is possible to adhere to the surface of a molded product exhibiting a three-dimensional shape, and to create a beautiful metallic luster pattern with a rich variety of decorations on the surface. As a result of various research and experiments in an attempt to obtain a decorative label, the present invention was completed. That is, the present invention
a step of providing a transparent anchor layer 2 on a heat-shrinkable base sheet 1; a step of providing a water-soluble resin ink layer 3 on the transparent anchor layer 2 in areas where metallic luster is not required; and a step of providing the water-soluble resin ink layer on the transparent anchor layer 2. 3. Before and/or after providing the metal thin film layer 4 on the transparent anchor layer 2, a dye and a solvent are used to dye the part corresponding to the part where the metallic luster pattern colored in an arbitrary color is to appear. A step of printing and applying a dye solution containing no binder (dye solution layer 5);
A metallic luster pattern characterized by the following steps: a step of providing a metal thin film layer 4 on the entire surface, a step of removing the water-soluble resin ink layer 3 and unnecessary matters on the water-soluble resin ink layer 3 by washing, and drying. This is a method for manufacturing a decorative label.

Hereinafter, the present invention will be explained in detail using the drawings.

First, the present invention provides a heat-shrinkable base sheet 1.
A transparent anchor layer 2 is provided on top.

Examples of the heat-shrinkable base sheet 1 that can be used in the present invention include polyethylene film, polypropylene film, polyester film, polyvinyl chloride film, and polystyrene film.

The transparent anchor layer 2 formed on the base sheet 1 is preferably formed using a resin that can be dyed with the dye described below when printing and coating the dye solution layer 5 on the layer 2. When the metal thin film layer 4 is provided directly on the metal thin film layer 2, it is preferable to form the metal thin film layer 4 using a resin that has excellent adhesion to the metal thin film layer 4.

In addition, since the transparent anchor layer 2 will be subjected to a cleaning process later, it is necessary to use a resin having particularly excellent water resistance. Such resins include acrylic resins, rubber resins, and the like.

Further, on the base sheet 1, a transparent anchor layer 2
When providing the transparent anchor layer 2 or/
A printed pattern ink layer 6 may also be provided underneath (see FIG. 3). By doing so, the metallic luster pattern obtained by the present invention can be made even more varied. When providing this printed pattern ink layer 6, it is preferable to take into consideration the heat shrinking process described later.

Next, a water-soluble resin ink layer 3 is provided on the transparent anchor layer 2 in areas where metallic luster is not required.

For the water-soluble resin ink layer 3, a resin that can be easily dissolved and removed by washing in a post-process, such as a water-soluble cellulose resin such as methyl cellulose, or polyvinyl alcohol, can be used.

When printing the water-soluble resin ink layer 3, it is more preferable to add an extender pigment to the resin to improve ease of dissolution and removal during the washing process and printability.

In addition, this water-soluble resin ink layer 3 is required to function as a dye resisting layer when the transparent anchor layer 2 is dyed with a dye solution as described later. Depending on the composition of the dye solution, it is necessary to appropriately select and use dyes that are difficult to dye.

Next, before and/or after providing the metal thin film layer 4 on the water-soluble resin ink layer 3 and the transparent anchor layer 2, a portion corresponding to a portion where a metallic luster pattern colored in an arbitrary color will appear is dyed. To do this, a dye solution is applied by printing.

The dye solution used in the present invention consists of a dye and a solvent and does not contain a binder. This is because when the dye solution layer 5 is applied using a general ink or dye, the registration of the dye solution layer 5 of the dye ink and the water-soluble resin ink layer 3 is completely matched so that the two layers do not overlap. This is because if printing is not done in this way, the following problems will occur. That is, since general inks and paints contain a binder, this binder prevents the dissolution of the water-soluble resin when washed later, leaving the water-soluble resin ink layer 3 and the unnecessary metal thin film layer 4. This is because, even if it does not remain, the remaining water-soluble resin ink layer 3 impairs the transparency of that part, causing a problem that a metallic luster pattern colored in an arbitrary color cannot be formed. . In order to solve this problem, the present invention selectively uses a dye solution that is made up of a dye and a solvent and does not contain a binder. As a result, even if the dye solution layer 5 is formed to overlap the water-soluble resin ink layer 3, in extreme cases, the dye solution layer 5 may overlap the water-soluble resin ink layer 3.
Even if the dye solution layer 5 and the water-soluble resin ink layer 3 are printed on the entire surface, the dissolution of the water-soluble resin ink layer 3 is not hindered by subsequent washing, so the above-mentioned problem is completely solved, and the dye solution layer 5 and the water-soluble resin ink layer 3 are completely separated. This allows printing work to be carried out without having to worry about registration problems at all. As a result, in the decorative label obtained by the present invention, unnecessary metal thin film layer 4 may remain.
The water-soluble resin ink layer 3 remains and the transparency is not impaired.

In addition, the dye used in the dye solution has excellent dyeability for the resin constituting the transparent anchor layer 2,
Alternatively, a dye that has excellent adsorption to the metal thin film layer 4 and has low solubility in water so as not to dissolve in water and contaminate the non-dyed area of the transparent anchor layer 2 when the water-soluble resin ink layer 3 is dissolved and removed. It is preferable to use In particular, when using a water-insoluble dye, the transparent anchor layer 2 is not contaminated at all, which is preferable. For example, when the transparent anchor layer 2 is made of acrylic resin and the water-soluble resin ink layer 3 is made of polyvinyl alcohol, it is preferable to use an oil-soluble dye.

Furthermore, the solvent used in the dye solution has the property of dissolving the dye, dissolving or swelling the transparent anchor layer 2, and the water-soluble resin ink layer 3.
For example, when the transparent anchor layer and the water-soluble resin ink layer have the compositions described above, toluene and ethyl acetate may be used.

Note that depending on whether the dye solution layer 2 is formed on the metal thin film layer 4, below it, or on both the top and bottom, decorative labels having different metallic luster patterns can be obtained. It is something that can be done. That is, (a) when the dye solution layer 5 is provided on the water-soluble resin ink layer 3 and the metal thin film layer 4 is provided thereon (see Figure 1-a), the dye solution is applied to the water-soluble resin ink layer. By dyeing the transparent anchor layer 2 in the area where 3 is not present, a decorative label using the base sheet 1 side as the surface can be obtained, and (b) a metal thin film layer 4 is provided on the water-soluble resin ink layer 3. , when a dye solution layer 5 is provided on this (first
-b), the dye solution dyes (adsorbs) the metal thin film layer 4, making it possible to obtain a decorative label using the base sheet 1 side as the back side.
(c) When the dye solution layer 5 is provided on the water-soluble resin ink layer 3, the metal thin film layer 4 is provided on top of that, and the dye solution layer 5 is further provided on top of that (Figure 1-c), the dye The solution dyes the transparent anchor layer 2 in the area where the water-soluble resin ink layer 3 is not present, and also dyes the metal thin film layer 4.

The metal thin film layer 4 formed above, below, or between the dye solution layer 5 can be provided with a metal such as aluminum, silver, or antimony by a vacuum evaporation method. In particular, when depositing aluminum, Since the aluminum vapor deposited layer is chemically active, it has excellent ability to adsorb dyes in post-processing, and as a result, a beautiful metallic luster can be obtained.

The next cleaning step is to remove the water-soluble resin ink layer 3, the unnecessary metal thin film layer 4 on the water-soluble resin ink layer 3, and the unnecessary dye (Figure 2-a,
(See Figures 2-b and 2-c). That is, the metal thin film layer 4 and the dye solution layer 5 that are unnecessary for an arbitrary pattern are removed and separated together with the water-soluble resin ink layer 3, and that area is made up of only the transparent anchor layer 2 and the base sheet 1. The portion necessary as a pattern remains on the transparent anchor layer 2, and a decorative label having a metallic luster pattern colored in an arbitrary color is obtained.

Note that the decorative label according to the present invention may be provided with a protective layer 7 for protecting the metal thin film layer 4 after the cleaning step and after drying (see FIG. 3).

The decorative label according to the present invention has the configuration described above, and can be used by a known method. For example, the decorative label is formed into a cylindrical shape, and then the label is attached to a molded product. attached to the surface,
If necessary, after preheating, the label may be heated to about 35° C. to 220° C. to heat shrink the label and bring it into close contact with the surface of the molded product.

Since the present invention has the configuration described above, it has the following effects. That is, it is possible to easily create a beautiful metallic luster pattern rich in variation on the surface of a molded product exhibiting a three-dimensional shape. In addition, in manufacturing it, there is no need for very complicated registration at all in terms of printing work, and it can be easily manufactured.

Therefore, the present invention has extremely great utility value industrially.

[Brief explanation of drawings]

Figure 1-a, Figure 1-b, and Figure 1-c show enlarged cross-sectional views of the decorative label before the cleaning process;
Figure a, Figure 2-b, and Figure 2-c show an enlarged cross-sectional view of the decorative label according to the present invention, and Figure 3 shows an enlarged cross-sectional view of another embodiment of the decorative label according to the present invention. Each is shown. In the figure, 1...Base sheet, 2...Transparent anchor layer, 3...Water-soluble resin ink layer, 4...Metal thin film layer, 5...Dye solution layer, 6...Printed pattern ink layer, 7... protective layer.

Claims (1)

[Claims] 1. A step of providing a transparent anchor layer on a heat-shrinkable base sheet, a step of providing a water-soluble resin ink layer on the transparent anchor layer in areas where metallic luster is not required, and the water-soluble resin ink layer. Before and/or after providing the metal thin film layer on the resin ink layer and the transparent anchor layer, a dye and a solvent are used to dye the part corresponding to the part where a metallic luster pattern colored in an arbitrary color is to appear. A process of printing and applying a dye solvent that does not contain a binder, a process of providing a metal thin film layer on the entire surface, a process of removing the water-soluble resin ink layer and unnecessary substances on the water-soluble resin ink layer by washing, and drying. A method for producing a decorative label having a metallic luster pattern. 2. The metal according to claim 1, characterized in that when a transparent anchor layer is provided on a heat-shrinkable base sheet, a printed pattern ink layer is provided above and/or below the transparent anchor layer. A method for producing a decorative label having a glossy pattern. 3. The method for producing a decorative label with a metallic luster pattern according to claim 1, which comprises providing a protective layer for protecting the metal thin film layer after drying.