JP2020040228A - Metal foil decoration method and metal foil decoration body - Google Patents

Abstract

To provide a metal foil decoration method and a metal foil decoration body having excellent durability.SOLUTION: The metal foil decoration method comprises a step of forming a first primer layer 10 on the surface of an object, a step of forming an adhesive layer 20 on the surface of the first primer layer, a step of forming a metal foil layer 30 on the surface of the adhesive layer, a step of forming a second primer layer 40 made of a material having transparency upon curing on the surface of the metal foil layer, a step of forming a coat layer 50 made of a material having transparency upon curing on the surface of the second primer layer, a step of forming a third primer layer 60 serving as a base for a pattern by UV inkjet printing of a tack-on-curing paint, which is a UV-curable paint that has tack upon curing, on the surface of the coat layer, a step of forming a pattern layer 70 by UV inkjet printing of a UV curable ink on the surface of the third primer layer, and a step of forming a top coat layer 80 made of a material having transparency upon curing on the surfaces of the coat layer and the pattern layer.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a metal foil decoration method and a metal foil decoration body having excellent durability.

As a method for decorating a metal foil, a method using a UV inkjet printer is known.
For example, in the metal foil decoration method of Patent Document 1, first, a primer layer is formed by printing a UV-curable paint (tacky paint at the time of curing) having tack (adhesiveness) at the time of curing on an object by UV inkjet. Next, a metal foil is stuck on the primer layer using a tack to form a metal foil layer. Then, an image based on the same print data as the print data used at the time of forming the primer layer is printed on the metal foil layer with a paint having a tack at the time of curing to form an intermediate layer. Then, an image based on the same print data is printed on the intermediate layer with an ultraviolet curable ink to form a protective layer. Finally, the excess portion (the portion not covered with the protective layer) of the gold foil layer of the object is scraped off using a gauze or the like to which anhydrous alcohol has been applied to finish the metal foil decorative body. According to this method, the accuracy of the decoration is improved and the time until completion can be shortened.

  Further, in the metal foil decoration method of Patent Document 2, a metal foil layer forming step of forming a metal foil layer on the surface of an object and a resist forming step of performing UV inkjet printing of a UV-curable resist solution on a part of the metal foil layer And, by performing an etching process, an etching step of forming a through groove extending through a portion of the metal foil layer that is not covered with the resist to the surface of the object, a resist removing step of removing the resist, A protective layer forming step of protecting the surfaces of the metal foil layer and the through groove; In this method, a resist is formed on the surface of the metal foil by a UV inkjet printer, so that a metal foil decorative body having a sufficient aesthetic appearance as a decoration with the metal foil can be obtained.

JP 2014-30932 A JP 2016-175305 A

However, the techniques disclosed in the above patent documents have the following problems.
In general, it is difficult to adhere and fix an object on the surface of a metal foil, so that the protective layer formed on the surface of the metal foil is peeled off, resulting in a problem of poor durability.
In particular, for example, a prepaid card, a membership card, a credit card, or the like frequently used through a reading machine or the like, or a card-type calendar, a bookmark, and the like which the owner uses and carries on a daily basis, using the above-described conventional technology to form a metal. When a foil decoration is applied, the peeling of the protective layer and the metal foil becomes remarkable, and there is a possibility that the foil cannot be used.

  In view of such a problem, an object of the present invention is to provide a metal foil decoration method and a metal foil decoration body having excellent durability.

The metal foil decoration method of the present invention is a metal foil decoration method for decorating an object using a metal foil, wherein a step of forming a first primer layer on the surface of the object, A step of forming an adhesive layer on the surface, a step of forming a metal foil layer on the surface of the adhesive layer, and a step of forming a second primer layer made of a material having transparency upon curing on the surface of the metal foil layer; Forming a coat layer made of a material having transparency when cured on the surface of the second primer layer, and applying a cured tack-containing paint, which is a UV-curable paint having a tack when cured, on the surface of the coat layer. A step of forming a third primer layer serving as a base of the pattern by UV inkjet printing, and a step of forming a pattern layer by UV inkjet printing of a UV-curable ink on the surface of the third primer layer; and And a step of forming a top coat layer made of a material having transparency upon curing on the surface of the design layer.
The method may further include a step of adding the surface of the coat layer after forming the coat layer.
Further, the metal foil is made of a single metal such as gold, silver, platinum, copper, tin, or aluminum, or an alloy of these metals.
Further, the metal foil is a punched foil.
Further, a step of forming a decorative resin layer is provided between the step of forming the first primer layer and the step of forming the adhesive layer.
Further, a magnetic layer is provided on the back surface of the object.

The metal foil decorative body of the present invention is a metal foil decorative body in which a surface of an object is decorated with a metal foil, a first primer layer formed on the surface of the object, and the first primer layer. An adhesive layer formed on the surface of the metal foil layer formed on the surface of the adhesive layer, a second primer layer formed of a material having transparency at the time of curing, formed on the surface of the metal foil layer, and cured. A coat layer formed of a material having transparency at the time and formed on the surface of the second primer layer, and formed on the surface of the coat layer using a tack-on-curing paint which is a UV-curable paint having a tack when cured. The third primer layer serving as a base for the design, a design layer formed on the surface of the third primer layer using an ultraviolet curable ink, and the coating layer made of a material having transparency when cured. On the surface of the pattern layer Characterized in that it comprises at least a top coat layer was made.
Further, a resin layer for decoration is provided between the first primer layer and the adhesive layer.

In the present invention, since the first to third primer layers are used, the adhesion between the object and the adhesive layer, the adhesion between the metal foil layer and the coat layer, the adhesion between the coat layer and the design layer are improved, It is possible to obtain a metal foil decoration method and a metal foil decoration body having excellent durability by suppressing peeling.
In addition, since the third primer layer serving as a base of the pattern is formed of a paint having a tack at the time of curing, the ultraviolet curable ink can be firmly adhered to the third primer layer using tack (adhesion).
In addition, if the surface of the coat layer is subjected to a footing treatment, the adhesion between the coat layer and the third primer layer and between the coat layer and the top coat layer can be improved. By adding the surface of the coat layer to the surface of the coat layer, very fine concave portions and convex portions are generated on the surface of the coat layer. The appearance of the coat layer becomes dull due to the extremely minute concave and convex portions, and the metal foil layer becomes difficult to see. However, when the top coat layer is formed on the surface of the coat layer, the resin of the top coat layer enters into the very fine concave portions on the surface of the coat layer and covers the finer convex portions. Therefore, the dull state when viewed from the top coat layer is eliminated, and the metal foil layer can be seen clearly.

Further, if a punched foil is used as the metal foil, the punched foil has many small holes that are invisible to the naked eye as compared with a metal foil formed by a well-known industrial manufacturing method such as vapor deposition. Therefore, the resin of the adhesive layer passes through the inside of the hole, and is cured in a slightly raised convex shape on the surface of the metal foil.
When the second primer layer is formed in this state, the adhesive cured in the convex shape is covered with the resin of the second primer layer, and the convex adhesive functions as a pile or a spike, and the second primer layer is formed of metal foil. Can be firmly fixed to the surface. Thereby, peeling and displacement of the metal foil can be suppressed.
In addition, even when using a single metal such as silver, platinum, copper, tin, and aluminum or an alloy of these metals in addition to gold, fine holes are opened as long as they are obtained by stamping foil. Therefore, the effect of suppressing the above-described separation and displacement can be obtained.
In addition, after the metal foil by the stamped foil is once attached to the surface of the object, the metal foil that has not been adhered is collected with a brush or the like, crushed into a fine powder, and put on the surface of the metal foil and brushed. By tracing from above, a pinhole generated in the metal foil or a chipped end of the metal foil can be filled and repaired. Therefore, the design can be improved as compared with the metal foil obtained by the industrial manufacturing method.
In addition, if a decorative resin layer is provided between the first primer layer and the adhesive layer, the design can be further improved since the metal foil layer and the design layer can be drawn with the resin layer as a background.
If a magnetic layer is formed on the back surface of the object, the metal foil decorative body can be used as a prepaid card or the like.

Vertical sectional views showing a metal foil decoration method and a metal foil decoration body (a) to (h) Longitudinal sectional view showing another configuration example of a metal foil decorative body

An embodiment of a metal foil decoration and a metal foil decoration method of the present invention will be described with reference to the drawings.
First, a first primer layer 10 is formed on the surface of the object 1 as shown in FIG. In each drawing, the thickness of each layer is shown larger than the size of the object 1 for easy understanding, and the ratio of the thickness of each layer is different from the actual one. Further, in FIG. 1, the surface of the object is a flat surface, but may naturally be a curved surface or another surface shape.
The object 1 includes, but is not limited to, resin molded products such as wood, glass, mirrors, and plastics.
The primer used as the material of the first primer layer 10 is not particularly limited, and includes, for example, olefin-based, acrylic-based, urethane-based, ethylene-vinyl acetate-based, polyester-based, vinyl chloride-based, and polyurethane-based. Those containing olefins are preferred.

Next, as shown in FIG. 1 (b), an adhesive layer 20 is formed on the surface of the first primer layer 10.
The adhesive layer 20 is used for fixing and attaching a metal foil described below to the surface of the object 1, and includes coating methods such as spray coating, gravure coating, roll coating, and comma coating, and gravure printing. It is formed by a well-known means such as a screen printing method. Alternatively, the adhesive may be processed in advance into a sheet shape, and the adhesive layer 20 may be formed by attaching the sheet.
The adhesive constituting the adhesive layer 20 is not particularly limited as long as a desired adhesive force can be obtained.For example, in addition to polyolefin resins such as polyethylene and polypropylene, polyester resins, polyurethane resins, and epoxy resins A thermosetting resin such as a resin may be used. These resins may be used in the form of an emulsion. If necessary, the adhesive surface may be subjected to a so-called footing treatment such as a corona discharge treatment, a plasma treatment, a degreasing treatment, and a surface roughening treatment.
The thickness of the adhesive layer 20 depends on the object 1, the metal foil, the type of the adhesive to be used, and the like, and is not particularly limited. You get the power. If the thickness of the adhesive layer 20 is less than 20 μm, the adhesiveness may be insufficient.If the thickness is more than 30 μm, the cost may be high. -There is a possibility that the sticking work may be hindered. The surface of the adhesive layer 20 is preferably smooth.
Note that a decorative resin layer may be provided between the first primer layer 10 and the adhesive layer 20. The decorative resin layer is a layer made of a natural resin such as lacquer or a synthetic resin such as a urethane resin. For example, by applying lacquer to the entire surface of the first primer layer 10, a layer utilizing the black color of lacquer can be formed as a background of the metal foil layer 30 and the design layer 70 described below. Further, the surface of the decorative resin layer may be decorated with a lacquer-like decoration by drawing a picture, a pattern, a character, or the like using a metal powder such as gold or silver, or a powder made of a material other than metal. .

Next, as shown in FIG. 1C, a metal foil layer 30 is formed on the surface of the adhesive layer 20.
The metal foil may be a metal foil manufactured by a traditional foil stamping technique, that is, a stamped foil, or may be a metal foil manufactured by a well-known industrial manufacturing method such as vapor deposition.
The metal foil layer 30 may be formed so as to cover the entire surface of the adhesive layer 20, or may be formed so as to cover a part of the surface of the adhesive layer 20.
When a stamped foil is used as the metal foil, the worker may manually place the metal foil on the surface of the adhesive layer 20.
As the material of the punched foil, a single metal such as gold, silver, platinum, copper, tin, and aluminum, or an alloy of these metals can be used. An example of the alloy is a Western foil (brass foil) made of copper and zinc.
In addition, as the material of the punched foil, any metal material that can be obtained by a traditional foil punching technique, other than flake-shaped metal foil pieces and powders, can be adopted. These metal materials are thinly rolled by a traditional foiling technique, so that a metal foil having a thickness of about 0.1 to 1.5 μm can be produced.
In addition, since the cast foil is made of a single metal such as gold or silver, or an alloy, there is no problem that the base material and the metal material are separated from each other as in the case of a metal foil manufactured by an industrial manufacturing method. . That is, the cast foil is superior in durability as compared with the metal foil manufactured by the industrial manufacturing method.

The punched foil has a calm and elegant luster. On the other hand, a metal foil manufactured by an industrial manufacturing method has an excessive glossiness similar to plating. That is, the cast foil is superior in design in terms of glossiness as compared with the metal foil manufactured by the industrial manufacturing method.
The punched foil has the same degree of gloss on both the front and back surfaces. On the other hand, metal foils manufactured by an industrial manufacturing method have different gloss levels on both sides. That is, the cast foil is superior in design to the metal foil manufactured by an industrial manufacturing method in terms of uniformity of gloss on both sides.
In addition, the cast foil has countless wrinkles generated in the manufacturing process on both the front and back surfaces, and has a unique pattern due to the wrinkles on the front and back surfaces. On the other hand, a metal foil manufactured by an industrial manufacturing method does not have a unique pattern such as a stamped foil on the surface. That is, the cast foil is superior in design in terms of the surface pattern as compared with the metal foil manufactured by the industrial manufacturing method.

Next, as shown in FIG. 1D, a second primer layer 40 made of a material having transparency upon curing is formed on the surface of the metal foil layer 30.
The primer used as the material of the second primer layer 40 is one that becomes transparent or translucent when cured. The primer may be colored. By using a primer that becomes transparent or translucent when cured, the lower metal foil layer 30 can be seen through.
The primer used as the material of the second primer layer 40 is not particularly limited, and may be, for example, olefin-based, acrylic-based, urethane-based, ethylene-vinyl acetate-based, polyester-based, vinyl chloride-based, or polyurethane, as in the first primer layer 10. And the like, among which those containing an olefin are preferred.
Next, as shown in FIG. 1E, a coat layer 50 made of a material having transparency at the time of curing is formed on the surface of the second primer layer 40.
The material of the coat layer 50 may be any material that becomes transparent or translucent at the time of curing, such as a two-component cured urethane resin, a thermosetting urethane resin, a melamine resin, a cellulose ester resin, a chlorine-containing rubber resin, and chlorine. Examples include vinyl-based resin, acrylic resin, epoxy-based resin, and vinyl-based copolymer resin.
The coat layer 50 is formed on the surface of the second primer layer 40 by a known method such as a spray coating, a gravure coating method, a roll coating method, a coating method such as a comma coating method, a gravure printing method, and a screen printing method. Alternatively, the coat layer 50 may be formed by processing the resin material into a sheet shape in advance and attaching the sheet to the second primer layer 40.
After the formation of the coat layer 50, the surface of the coat layer 50 may be subjected to a footing treatment.
Examples of the adding treatment include, but are not limited to, polishing, corona discharge treatment, plasma treatment, degreasing treatment, and surface roughening treatment.

Next, a third primer layer 60 is formed on the surface of the coat layer 50 as shown in FIG.
The third primer layer 60 serves as a base for the design. The third primer layer 60 is formed by performing UV inkjet printing on the surface of the coat layer 50 with an ultraviolet-curing paint having a tack at the time of curing (a paint having a tack at the time of curing).
The UV inkjet printer used in the step of forming the third primer layer 60 is a well-known technique and is not shown in the drawings, but a table on which the object 1 is placed, and at least relative to the object 1 within the XY plane. It is roughly composed of a movable carriage. The carriage is equipped with a recording head that discharges the tacky paint when cured toward the table, and an LED for ultraviolet irradiation that cures the tacky paint that has been ejected by the recording head.
The paint with tack when cured is a colorless and transparent paint that can be discharged from the recording head. Examples of the paint having a tack at the time of curing include acrylate as a binder resin.
The object having been formed up to the coat layer 50 is fixed at a predetermined position on the table of the inkjet printer. Then, the paint with curing tack is discharged from the recording head toward the surface of the coat layer 50 so as to draw a pattern (image) based on arbitrary print data, and an LED for ultraviolet irradiation is directed toward the paint with tack when curing. Irradiate with ultraviolet light. The third primer layer 60 is formed by performing UV inkjet printing on the coat layer 50 with a tack-on-curing paint on the coat layer 50 with a pattern based on print data using an inkjet printer.

Next, a pattern layer 70 is formed on the surface of the third primer layer 60 as shown in FIG.
The pattern layer 70 is formed on the surface of the third primer layer 60 by UV inkjet printing using an ultraviolet curable ink based on the same print data as the print data used in forming the third primer layer 60 described above. Is done. The pattern layer 70 may be formed by dispersing and fixing a metal powder such as gold or silver or a powder made of a material other than metal on the surface of the ultraviolet curable ink.
Next, as shown in FIG. 1 (h), a top coat layer 80 made of a material having transparency upon curing is formed on the surfaces of the coat layer 50 and the design layer 70.
The top coat layer 80 is a resin layer provided to protect the surfaces of the coat layer 50 and the design layer 70. The top coat layer 80 is formed on the surface of the coat layer 50 and the pattern layer 70 by a known method such as spray coating, a gravure coating method, a roll coating method, a coating method such as a comma coating method, a gravure printing method, or a screen printing method. . Alternatively, the resin material may be processed into a sheet shape in advance, and the sheet may be attached to the coat layer 50 and the design layer 70 to form the top coat layer 80.
The top coat layer 80 is preferably composed of a material that is transparent or translucent when cured and has excellent scratch resistance and stain resistance (stain resistance). Specifically, a two-part cured urethane resin, a thermosetting urethane resin, Melamine resins, cellulose ester resins, chlorine-containing rubber resins, chlorine-containing vinyl resins, acrylic resins, epoxy resins, vinyl copolymer resins, and the like. In addition, lacquer may be used as the top coat layer 80, and a deep luster can be obtained by performing so-called wiping lacquer work. In addition, scratch resistance and the like may be increased by containing a ceramic powder such as silica, alumina, zirconia, and silicon carbide.
The thickness of the top coat layer 80 is not particularly limited, but is preferably about 30 to 40 μm. If the thickness of the top coat layer 80 is less than 30 μm, it may be difficult to secure the function of preventing trauma. If the thickness exceeds 40 μm, it is not preferable in terms of cost and securing transparency. Further, the surface of the top coat layer 80 is preferably smooth.

Thus, the decoration of the metal foil is completed, and the metal foil decorative body 100 is completed.
As shown in FIG. 2, by forming a magnetic material layer 90 on the back surface of the object, the metal foil decorative body 100 is read and used frequently as a prepaid card, a membership card, a credit card, etc. You can also. Since the metal foil decorative body 100 uses a metal foil, it blocks ultraviolet rays, electromagnetic waves, and the like. However, if the magnetic layer 90 is formed on the back surface of the object, various data recorded on the magnetic layer 90 can be read and rewritten.
Alternatively, the front and back surfaces of the metal foil decorative body 100 may be laminated and used as a card type calendar, a bookmark, or the like.

  The present invention is a metal foil decoration method and a metal foil decoration body having excellent durability, and has industrial applicability.

1 Object
10 First primer layer
20 Adhesive layer
30 Metal foil layer
40 Second primer layer
50 coat layer
60 Third primer layer
70 design layer
80 Topcoat layer
90 Magnetic layer
100 Metal foil decoration

Claims (8)

A metal foil decoration method for decorating an object using a metal foil,
Forming a first primer layer on the surface of the object,
Forming an adhesive layer on the surface of the first primer layer,
Forming a metal foil layer on the surface of the adhesive layer,
A step of forming a second primer layer made of a material having transparency when cured on the surface of the metal foil layer,
Forming a coat layer made of a material having transparency upon curing on the surface of the second primer layer,
A step of forming a third primer layer serving as a base for a pattern by performing UV inkjet printing on the surface of the coat layer with a cured tack-containing paint that is a UV-curable paint having a tack when cured,
A step of forming a design layer by UV inkjet printing the surface of the third primer layer with an ultraviolet curable ink,
A method for decorating a metal foil, comprising at least a step of forming a top coat layer made of a material having transparency upon curing on the surfaces of the coat layer and the design layer.
2. The metal foil decoration method according to claim 1, further comprising a step of adding a surface of the coat layer after forming the coat layer.
3. The metal foil decoration method according to claim 1, wherein the metal foil is made of a single metal such as gold, silver, platinum, copper, tin, or aluminum, or an alloy of these metals.
The metal foil decoration method according to any one of claims 1 to 3, wherein the metal foil is a punched foil.
The method according to any one of claims 1 to 4, further comprising a step of forming a decorative resin layer between the step of forming the first primer layer and the step of forming the adhesive layer. Metal foil decoration method.

The metal foil decoration method according to any one of claims 1 to 5, wherein a magnetic layer is provided on a back surface of the object.
A metal foil decorative body in which the surface of the object is decorated with metal foil,
A first primer layer formed on the surface of the object,
An adhesive layer formed on the surface of the first primer layer,
A metal foil layer formed on the surface of the adhesive layer,
A second primer layer made of a material having transparency upon curing and formed on the surface of the metal foil layer,
A coat layer formed of a material having transparency at the time of curing and formed on the surface of the second primer layer,
A third primer layer, which is formed on the surface of the coat layer using a tack-on-curable paint that is a UV-curable paint having a tack when cured, and serves as a base for the design,
A pattern layer formed on the surface of the third primer layer using an ultraviolet curable ink,
A metal foil decorative body comprising at least a top coat layer made of a material having transparency upon curing and formed on the surface of the coat layer and the design layer.
8. The decorative metal foil body according to claim 7, wherein a decorative resin layer is provided between the first primer layer and the adhesive layer.

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