JPH08258497A - Three-dimensional stereogram transfer sheet and cubic body decorated with pattern having three-dimensional stereogram - Google Patents

Abstract

PURPOSE: To easily decorate a surface of a cubic body such as an electric appliance and a stationery with a pattern having a three-dimensional stereogram by forming a pattern layer having a three-dimensional stereogram on a base film. CONSTITUTION: A three-dimensional stereogram transfer sheet is formed by sequentially forming, on a base film 1, a peeling layer 2, a pattern layer 3 which contains a three-dimensional stereogram, and an adhesive layer 4. For the base film 1, a resin sheet, a metal foil, a cellulose sheet are used. Although the three-dimensional stereogram is of a pattern having dots arranged irregularly at first glance, it is of a pattern in which a three-dimensional image can be seen depending on viewpoint by perspective control of focus. The pattern layer 3 is normally formed on the peeling layer 2 as a printing layer. For forming the printing layer, offset printing method or gravure printing method is used. The pattern layer 3 may be a layer consisting of the printing layer and a metal thin film layer.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet for painting a pattern including a three-dimensional stereogram on the surface of a three-dimensional object such as an electric product, a cosmetic container, and a stationery.

[0002]

2. Description of the Related Art A pattern including a three-dimensional stereogram is characterized in that a three-dimensional image appears to stand out depending on the viewpoint by a focus operation. This stereoscopic image can be seen or not seen by the viewer, and can be seen by training even the invisible person. Moreover, from such a pattern, it is called stereoscopic vision that a stereoscopic image is raised by a focus operation.

[0003] Conventionally, a pattern including a three-dimensional stereogram has been commercialized by being published in a book or a poster for the purpose of stereoscopically viewing the pattern itself. It was also used as a pattern on telephone cards, neckties, plates, and fans. A pattern including a three-dimensional stereogram was formed by using a normal printing method such as a gravure printing method and a screen printing method.

On the other hand, the patterns of three-dimensional objects such as electric appliances, cosmetics containers, stationery, etc. include, for example, woodgrain patterns and grain patterns.

[0005]

However, designs including three-dimensional stereograms have never been used as patterns for three-dimensional objects such as electric appliances, cosmetic containers, and stationery.

Also, wood grain patterns and grain patterns used as patterns of three-dimensional objects such as electric appliances, cosmetics containers, and stationery do not naturally give rise to three-dimensional images no matter how they are viewed, and they are interesting. It was not there.

An object of the present invention is to provide a three-dimensional object on which a pattern including a three-dimensional stereogram is painted.

[0008]

In order to achieve the above object, the three-dimensional stereogram transfer sheet of the present invention comprises:
A pattern layer including a three-dimensional stereogram was formed on the base film. Further, using the above-mentioned transfer sheet, a three-dimensional object having a pattern including a three-dimensional stereogram painted thereon was constructed by a transfer method.

The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a sectional view showing an embodiment of the basic layer structure of the three-dimensional stereogram transfer sheet of the present invention. FIG. 2 is a cross-sectional view showing how a three-dimensional stereogram transfer sheet of the present invention is used to transfer a three-dimensional object. In the figure, 1 is a base film, 2 is a release layer, 3
Is a design layer, 4 is an adhesive layer, and 5 is a three-dimensional object.

A three-dimensional stereogram transfer sheet is obtained by sequentially forming a transfer layer comprising a release layer 2, a pattern layer 3 containing a three-dimensional stereogram, an adhesive layer 4 and the like on a base film 1.

The material of the base film 1 is a resin sheet of polypropylene resin, polyethylene resin, polyamide resin, polyester resin, acrylic resin, polyvinyl chloride resin, etc., metal foil such as aluminum foil, copper foil, etc. A cellulose sheet such as glassine paper, coated paper, or cellophane, or a composite of the above sheets, which is used as the base film 1 of a normal transfer sheet, can be used.

When the transfer layer can be easily peeled from the base film 1, the transfer layer may be directly provided on the base film 1. In order to improve the releasability of the transfer layer from the base film 1, a release layer (not shown) may be entirely formed before the transfer layer is provided on the base film 1.
The release layer is released from the transfer layer together with the base film 1 when the base film 1 is peeled off after transfer or simultaneous molding transfer, but in some cases, interlayer release occurs, and a part of the release layer is the outermost surface of the transfer layer. May remain. The material of the release layer, melamine resin-based release agent, silicone resin-based release agent, fluororesin-based release agent, cellulose derivative-based release agent, urea resin-based release agent, polyolefin resin-based release agent,
A paraffin-based release agent and a composite release agent of these may be used. Examples of the method for forming the release layer include a coating method such as a roll coating method and a spray coating method, and a printing method such as a gravure printing method and a screen printing method.

The release layer 2 is wholly or partially formed on the base film 1 or the release layer. The release layer 2 is
It is a layer that becomes the outermost surface of the three-dimensional object by peeling from the base film 1 or the release layer when the base film 1 is peeled off after the transfer or the molding simultaneous transfer. When the peeling layer 2 causes delamination, the delaminated surface is the outermost surface. Also, when the release layer causes interlayer release,
The release layer remaining on the surface of the transfer layer becomes the outermost surface of the three-dimensional object. Examples of the material of the release layer 2 include acrylic resin, polyester resin, polyvinyl chloride resin, cellulose resin, rubber resin, polyurethane resin, polyvinyl acetate resin, and vinyl chloride-vinyl acetate copolymer. Copolymers such as a system resin and an ethylene-vinyl acetate copolymer system resin may be used. When the release layer 2 is required to have hardness, a photocurable resin such as an ultraviolet curable resin, a radiation curable resin such as an electron beam curable resin, or a thermosetting resin may be selected and used. The release layer 2 may be colored or uncolored. Examples of the method for forming the release layer 2 include a coating method such as a gravure coating method, a roll coating method, and a comma coating method, and a printing method such as a gravure coating method and a screen printing method.

The pattern layer 3 is a pattern including a three-dimensional stereogram partially or entirely. At first glance, the three-dimensional stereogram is a pattern in which the dots are arranged in a scattered manner, but the stereoscopic image appears to emerge depending on the viewpoint when the focus is moved in and out. There are two types of focusing operations, a method of looking at a design while focusing far (a parallel method) and a method of looking at a design while focusing on a cross-eyed eye (crossing method).

Regarding such a method of creating a three-dimensional stereogram in which the dots are arranged at random at first glance, recently, application software for creation can be easily obtained by computer graphics technology. Yes, and you can easily create them. As a pattern of a three-dimensional image, there are pictures, letters, numbers, symbols, and combinations thereof.

The pattern layer 3 is usually formed as a printed layer on the release layer 2. As the material of the printed layer, polyvinyl resin, polyamide resin, polyester resin, acrylic resin, polyurethane resin, polyvinyl acetal resin, polyester urethane resin, cellulose ester resin, resin such as alkyd resin is used as a binder. It is preferable to use a colored ink containing a pigment or dye of an appropriate color as a colorant. As a method for forming the print layer, a normal printing method such as an offset printing method, a gravure printing method, or a screen printing method may be used. In particular, offset printing and gravure printing are suitable for multicolor printing and gradation expression. Further, in the case of a single color, a coating method such as a gravure coating method, a roll coating method or a comma coating method can be adopted. The print layer may be provided entirely or partially depending on the design to be expressed.

The pattern layer 3 may be a combination of a printed layer and a metal thin film layer. Therefore, in this case, for example, a pattern layer in which the print layer is surrounded by a frame made of a metal thin film layer can be used. The metal thin film layer is for expressing a metallic luster as a pattern layer, and is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method or the like. In this case, depending on the desired metallic luster color, aluminum, nickel, gold, platinum, chromium, iron,
Metals such as copper, tin, indium, silver, titanium, lead and zinc, alloys or compounds thereof are used. As an example of forming a partial metal thin film layer, after forming a solvent-soluble resin layer in a portion that does not require a metal thin film layer, a metal thin film is formed on the entire surface, and solvent cleaning is performed. There is a method of removing an unnecessary metal thin film together with the solvent-soluble resin layer. The solvent often used in this case is water or an aqueous solution. Further, as another example, there is a method of forming a metal thin film on the entire surface, then forming a resist layer on the portion where the metal thin film is to be left, and etching with acid or alkali to remove the resist layer. . When providing the metal thin film layer, a front anchor layer or a rear anchor layer may be provided in order to improve the adhesion between the other transfer layer and the metal thin film layer. The materials of the front anchor layer and the rear anchor layer are two-component curable urethane resin, thermosetting urethane resin, melamine resin, cellulose ester resin, chlorine-containing rubber resin, chlorine-containing vinyl resin, acrylic resin, epoxy. Resins, vinyl copolymer resins, etc. may be used. As a method of forming the front anchor layer and the rear anchor layer, there are a coating method such as a gravure coating method, a roll coating method and a comma coating method, and a printing method such as a gravure coating method and a screen printing method.

The adhesive layer 4 adheres the above layers to a three-dimensional object. The adhesive layer 4 is formed on a portion to be bonded. That is, when the portion to be bonded is entirely, the adhesive layer 4 is entirely formed on the pattern layer 3. If the portion to be bonded is partial, the adhesive layer 4 is partially formed on the pattern layer 3. As the adhesive layer 4, a heat-sensitive or pressure-sensitive resin suitable for the material of the three-dimensional object is appropriately used. For example,
If the three-dimensional object is made of acrylic resin, acrylic resin may be used. When the material of the three-dimensional object is polyphenylene oxide / polystyrene resin, polycarbonate resin, styrene copolymer resin, or polystyrene blend resin, acrylic resin, polystyrene resin, polyamide resin having affinity with these resins. A resin or the like may be used. Further, when the material of the three-dimensional object is polypropylene resin, chlorinated polyolefin resin, chlorinated ethylene-vinyl acetate copolymer resin, cyclized rubber and coumarone indene resin can be used. As a method for forming the adhesive layer 4, there are a coating method such as a gravure coating method, a roll coating method, and a comma coating method, and a printing method such as a gravure coating method and a screen printing method.

The structure of the transfer layer is not limited to the above-mentioned embodiment. For example, when the material for the pattern layer 3 has excellent adhesiveness to a three-dimensional object, the adhesive layer 4 is omitted. can do.

Examples of the three-dimensional object 5 include electric products, cosmetic containers, stationery, in-vehicle products, general miscellaneous goods, and parts thereof. In terms of material, the three-dimensional object 5 may be a resin molded product, a rubber product, a metal product, a woodwork product, a glass product, a ceramic product, or a composite product made of various materials. These are transparent,
It may be translucent or opaque. Also, the three-dimensional object 5 is
It may or may not be colored. As the resin, polystyrene resin, polyolefin resin,
General purpose resins such as ABS resin, AS resin and AN resin can be mentioned. In addition, general-purpose engineering resins such as polyphenylene oxide / polystyrene resin, polycarbonate resin, polyacetal resin, acrylic resin, polycarbonate-modified polyphenylene ether resin, polybutylene terephthalate resin, polybutylene terephthalate resin, ultra-high molecular weight polyethylene resin and polysulfone resin. , Polyphenylene sulfide resin,
Polyphenylene oxide resin, polyarylate resin,
Super engineering resins such as polyetherimide resin, polyimide resin, liquid crystal polyester resin, and polyallyl heat-resistant resin can also be used. Furthermore, a composite resin to which a reinforcing material such as glass fiber or an inorganic filler is added can also be used.

A method of painting a three-dimensional object using the transfer method using the transfer sheet having the above-mentioned layer structure will be described. First, the adhesive layer 4 side of the transfer sheet is brought into close contact with the surface of the three-dimensional object. Next, using a transfer machine such as a roll transfer machine or an up-down transfer machine equipped with a heat-resistant rubber-like elastic material such as silicon rubber, a temperature of about 80 to 260 ° C and a pressure of 50 to 200 kg / m ²
Heat and pressure are applied from the side of the base film 1 of the transfer sheet through the heat-resistant rubber-like elastic body set under the conditions of a certain degree. By doing so, the adhesive layer 4 adheres to the surface of the three-dimensional object. Finally, when the base film 1 is peeled off after cooling, peeling occurs at the interface between the base film 1 and the peeling layer 2,
The transfer is completed. When the release layer is provided on the base film 1, when the base film 1 is peeled off, peeling occurs at the boundary surface between the release layer and the peeling layer 2, and the transfer is completed.
In these cases, the release layer 2 causes delamination,
Further, the release layer may cause interlayer release.

When the three-dimensional object is a resin molded product,
A molding simultaneous transfer method is a more rational method of transfer. The molding simultaneous transfer method will be described. First,
The transfer sheet is fed into a molding die including a movable die and a fixed die. At this time, the transfer sheets of each leaf may be fed one by one, or necessary portions of the long transfer sheet may be fed intermittently. When using a long transfer sheet,
It is preferable to use a feeder having a positioning mechanism so that the pattern layer 3 of the transfer sheet and the molding die are in register. Further, when the transfer sheet is intermittently fed, if the position of the transfer sheet is detected by the sensor and then the transfer sheet is fixed by the movable mold and the fixed mold, the transfer sheet is always fixed at the same position. This is convenient because the pattern layer 3 is not displaced. After closing the molding die,
Molten resin is injected and filled into the cavity from a gate provided in the fixed mold to form a three-dimensional object, and at the same time, a transfer sheet is adhered to the surface. After cooling the resin molded product, the molding die is opened and the resin molded product is taken out. Finally, the transfer is completed by peeling off the base film 1.

[0023]

[Function] When you look at the three-dimensional stereogram formed on the surface of a three-dimensional object with the focus in the distance (parallel method) or with the focus in front of you (crossing method), A three-dimensional image consisting of letters, numbers, and symbols emerges.

[0024]

【Example】

Example 1 On a base film made of polyethylene terephthalate, a peeling layer made of an acrylic resin, a pattern layer designed to make a three-dimensional picture stand out by a perspective operation of a focus, and an adhesive layer made of an acrylic resin were sequentially formed. Then, a three-dimensional stereogram transfer sheet was obtained. Using this three-dimensional stereogram transfer sheet, a pattern was transferred onto the door surface of the refrigerator by a transfer method. At first glance, the design of the refrigerator thus obtained looked like a grain pattern in which the dots were arranged in a scattered manner, but a three-dimensional picture emerged by operating the perspective of the focus.

Example 2 On a base film made of polyethylene terephthalate, a release layer made of an acrylic resin, a pattern layer designed so that three-dimensional letters and numbers can be seen by a perspective operation of a focus, and an acrylic resin are used. The following adhesive layers were sequentially formed to obtain a three-dimensional stereogram transfer sheet.
The three-dimensional letters and numbers are specifically the production date and production number of the product. Using this three-dimensional stereogram transfer sheet, a pattern was transferred onto the door surface of the refrigerator by a transfer method. At first glance, the design of the refrigerator obtained in this way looked like a grained pattern with scattered dots, but by operating the perspective of the focus, the manufacturing date and serial number of the product are three-dimensionally displayed. Seemed to emerge.

[0026]

The three-dimensional object on which the pattern including the three-dimensional stereogram obtained according to the present invention is painted seems to be a pattern in which the dots are arranged at random, but with the perspective operation of the focus, Depending on how you look at it, a stereoscopic image will appear, which adds to the fun of a game. In addition, a person who does not know that the three-dimensional image is hidden recognizes that the pattern is the dots arranged in pieces, so that information other than the manufacturer need not be hidden as a three-dimensional stereogram. I can now keep it.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a basic layer structure of a three-dimensional stereogram transfer sheet of the present invention.

FIG. 2 is a cross-sectional view showing a state in which transfer is performed on a three-dimensional object using the three-dimensional stereogram transfer sheet of the present invention.

[Explanation of symbols]

 1 Base film 2 Release layer 3 Design layer 4 Adhesive layer 5 Three-dimensional object

Claims (2)

[Claims] 1. A transfer sheet, wherein a pattern layer including a three-dimensional stereogram is formed on a base film. 2. A three-dimensional object characterized in that a pattern including a three-dimensional stereogram is painted by a transfer method using the transfer sheet according to claim 1.